Low-carbon hydraulic composition with additives - premixes and processes for its preparation - processes using

Abstract

Low-carbon adjuvanted hydraulic composition - premixes and processes for its preparation - processes using it. The invention aims to provide an adjuvanted hydraulic composition (ABCD), the low-carbon binder (A) of which comprises clinker and at least one mineral addition, and whose viscosity is suitable for its handling, in particular its shaping, while having an appropriate setting time, and whose mechanical properties at all ages and durability, in hardened form, are satisfactory. This aim is achieved by the adjuvanted hydraulic composition according to the invention, which comprises: (A) a hydraulic binder composition comprising: (A.1) between 1% and 55% by dry mass of lime, at least one source of clinker or a mixture thereof; (A.2) and at least one mineral addition; (B) an adjuvant composition comprising, relative to the total dry mass of active materials of the adjuvant composition: (B.1)(B.2.) 35% to 60% by mass of at least one water-reducing or high-strength water-reducing adjuvant selected from polyalkoxylated polycarboxylates, (B.3.) 25% to 45% by mass of at least one water-reducing or high-strength water-reducing adjuvant selected from polyalkoxylated phosphonates, (B.4.) 0.01% to 15% by mass of at least one rheological agent, (B.5.) 0.1% to 15% by mass of a calcium salt, (B.6.) 0.1% to 3% by mass of at least one antifoaming agent and / or at least one air-entraining agent, and (B.7.) 0.05% to 1% by mass of biocidal agent(s); (C) water; (D) at least one aggregate.

Description

Title of the invention: Low-carbon adjuvanted hydraulic composition - premixes and processes for its preparation - processes using technical field

[0001] The present invention relates to the field of hydraulic compositions with additives based on low-carbon hydraulic mineral binders, in particular due to a low clinker content.

[0002] In the wet state, these compositions comprise hydraulic binder (A), admixtures (or additives) (B), free water (C) and aggregates (D), are capable of setting and hardening (products in the process of hardening formed from the wet compositions) to form hardened products, such as ready-mix concrete, prefabricated concrete, hardened concrete structures, screeds, repair mortars, floor coverings, tile adhesives, joints, technical mortars....

[0003] More specifically, the invention relates to adjuvanted hydraulic compositions, dry or wet, premixes or kits for the preparation of these compositions, as well as methods for manufacturing these compositions and for producing hardened or curing products.

[0004] The present invention also relates to the use of an adjuvant composition to reduce the viscosity of wet hydraulic compositions, based on hydraulic mineral binders and with low carbon content, without affecting the mechanical properties of the hardened or hardening products obtained from said compositions. Previous art - Technical problem

[0005] The production of Portland cement has a significant negative impact on the environment due to the large quantities of carbon dioxide it generates. CO2 is released during the calcination of raw materials at very high temperatures (1450°C) in a kiln by decarbonation of limestone [Eq. (1)]: CaCO3 (s) → CaO (s) + CO2 (g) (Eq. (1))

[0006] In addition, the combustion of fossil fuels needed to heat the cement kiln releases carbon dioxide. Adding the additional emissions from grinding, this amounts to nearly one tonne of CO2 per tonne of Portland cement. Overall, the cement industry is responsible for approximately 7 to 9% of global carbon dioxide emissions.

[0007] In addition, handling Portland cement can lead to health problems (such as allergies), particularly due to its high alkalinity (pH greater than 13) and the presence in its composition of hazardous elements such as hexavalent chromium [Cr (VI)] which can be released during kneading (toxicity by skin contact).

[0008] Most current research on new binders aims to replace cement in various applications with binders that have a lower environmental impact. One solution is to use resources that do not require costly processing, such as co-products and by-products from other industries (waste for one industry, but a primary resource for others). This is the case with blast furnace slag, a co-product of the steel industry. By grinding this product into a fine powder (GGBS), a cementitious material is obtained that can be used as a partial substitute for Portland cement or used alone by adding chemical activators (such as alkalis or sulfates).

[0009] It is important to note that the use of GGBS, as defined in standard EN 197-1:2011 paragraph 5.2.2, is not only environmentally friendly, but also allows for several improved properties, excellent durability in general such as high resistance to sulfate attack, low permeability, good resistance in a chemically aggressive environment, low heat of hydration (necessary in massive structures), the ability to immobilize heavy metals or radionuclides, etc.

[0010] Another advantage of GGBS-based products is the possibility of preparing hydraulic compositions with lower water requirements to obtain the appropriate final properties of the hardened products. This aspect is also important from an environmental and societal point of view. Indeed, there is a dramatic reduction in water resources worldwide, and not only in arid regions, which leads to geopolitical tensions and wars. In this respect, the advantages of reducing the amount of mixing water used in cementitious materials are not insignificant when one considers the enormous quantity of cementitious materials consumed worldwide.

[0011] In addition, the presence of slag in a cementitious binder is known to limit the amount of Cr(VI), which is irritating on contact with the skin.

[0012] The treatment of these environmental and toxicological issues must not adversely affect the appropriate rheology of the wet hydraulic compositions for construction during hardening and shaping, nor the final properties of the hardened products obtained, namely mechanical strength and durability, which are directly related to the final porosity of the hardened products.

[0013] However, replacing clinker with mineral additives can significantly lower the water / binder ratio of these hydraulic compositions, thereby promoting the development of strength at all ages, particularly in the short term, and without impacting the durability of the hardened products. This reduction in the water / binder ratio directly results in an increase in the viscosity of the hydraulic composition. The intrinsic properties of the mineral additives can also affect the viscosity of the hydraulic composition, as their physical and chemical properties differ from those of clinker.

[0014] In order for these hydraulic compositions (ABCD) to be manageable, in particular shaped, it is therefore important to reduce their viscosity, without additional water, by means of viscosity-reducing additives.

[0015] These hydraulic compositions (ABCD), whose low-carbon binder (A) comprises clinker and at least one mineral addition, preferably have a cement paste volume, i.e. hydraulic composition (ABC) without aggregates (D), less than or equal to -in kg / m3 of hydraulic composition (ABCD) in an increasing order of preference-900; 800; 700; 600; 500 and greater than or equal to -in kg / m3 of hydraulic composition (ABCD) in an increasing order of preference-50; 100; 200; 250; 300. It is indeed for such volumes of cement paste that the problem of the rheology of the wet carbon composition is expressed in a more acute way.

[0016] Most of the adjuvants known to lower the viscosity of a hydraulic composition with a usual clinker content are not efficient enough to reduce the viscosity of a hydraulic composition with a reduced clinker content, or need to be introduced at levels that are too high to be economically viable and, moreover, cause instability problems.

[0017] In this context, the invention aims to satisfy at least one of the following objectives.

[0018] -01- provide an adjuvanted hydraulic composition (ABCD), of which the binder (A) low carbon comprises clinker and at least one mineral addition and whose viscosity is suitable for its handling in particular its shaping, while having an appropriate setting time, and whose mechanical properties at any age and durability, in hardened form, are satisfactory.

[0019] -02- provide an adjuvanted hydraulic composition (ABCD), of which the binder (A) low carbon includes clinker and at least one mineral addition, and is low carbon, eco-compatible and more health-acceptable than Portland cement clinker-rich hydraulic compositions.

[0020] -03- provide an adjuvanted hydraulic composition (ABCD), of which the binder (A) is low carbon includes clinker and at least mineral addition, and can be easily implemented in multiple and varied concrete or mortar applications for different applications.

[0021] -04- provide an adjuvanted hydraulic composition (ABCD), of which the binder (A) is low carbon includes clinker and at least mineral addition, and which can be obtained easily and economically by the usual production techniques.

[0022] -05- to provide dry or wet premixes for the preparation of a composition adjuvanted hydraulics (ABCD) satisfying at least one of the above objectives 01 to 04.

[0023] -06- provide kits for the preparation of an adjuvanted hydraulic composition (ABCD) satisfying at least one of the above objectives 01 to 04.

[0024] -07- provide a simple and economical method for manufacturing a composition adjuvanted hydraulics (ABCD) satisfying at least one of the above objectives 01 to 04.

[0025] -08- to provide a simple and economical process for producing hardened products starting from an adjuvanted hydraulic composition (ABCD) satisfying at least one of the above objectives 01 to 04.

[0026] -09- to provide hardened products from an adjuvanted hydraulic composition (ABCD) satisfying at least one of the above objectives 01 to 04, hardened products exhibiting an appropriate setting time, a rheology before hardening suitable for the handling / shaping required by the applications, and finally mechanical properties at any age, particularly at a young age, and durability meeting current standards.

[0027] -O10- provide the use of additives B for a hydraulic composition adjuvanted (ABCD) satisfying at least one of the above objectives 01 to 04. Brief description of the invention

[0028] At least one of the above objectives, among others, is satisfied by the invention which relates, firstly:

[0029] an additive hydraulic composition comprising: (A) a hydraulic binder composition comprising: (.Al) between 1% and 55% by mass on a dry basis of at least one source of clinker, lime, or a mixture thereof; (.A.2.) and at least one mineral addition; (B) an adjuvant composition comprising; relative to the total dry mass of active ingredients in the adjuvant composition: (.B. 1.) 35% to 60% by dry mass of at least one water-reducing or high-water-reducing adjuvant chosen from polycarboxylate polyalkoxylated adjuvants, (.B.2.) 25% to 45% by mass on a dry basis of at least one water-reducing or high-strength water-reducing adjuvant chosen from polyalkoxylated phosphonates, (.B.3.) 0.01% to 15% by mass on a dry basis of at least one rheological agent, (.B.4.) of 0.1% to 15% by mass on a dry basis of a calcium salt, with the condition that (.B.4.) is different from (.A.2.), (.B.5.) of 0.1% to 3% by dry mass of at least one antifoaming agent and / or at least one air-entraining agent, and (.B.6.) of 0.05% to 1% by mass on a dry basis of biocidal agent(s); (C) water; (D) at least one aggregate.

[0030] The inventors have thus discovered, surprisingly, that the addition, in appropriate proportions, of a rheological agent, known in principle to increase the viscosity of hydraulic compositions, makes it possible to decrease their viscosity when it is associated with at least one water-reducing or high water-reducing adjuvant chosen from polyalkoxylated polycarboxylates and at least one water-reducing or high water-reducing adjuvant chosen from polyalkoxylated phosphonates.

[0031] These low carbon wet hydraulic compositions according to the invention have a rheology adapted to their handling / shaping in many varied applications of concretes and mortars, while respecting the specifications during hardening and in the hardened state.

[0032] The invention also derives part of its uniqueness from the implementation of a judiciously selected low-carbon hydraulic binder composition (A) which, in addition to (.Al) and (.A.2.), comprises at least one of the following components: (A.3.) at least one filler in a concentration of at least 15% by mass on a dry basis relative to the hydraulic binder composition, (.A.4.) and at least one activator comprising a sulfate source and / or a sulfite ion source and / or at least one activator other than those consisting of a sulfate source of sulfate ions and / or sulfite ions, in a concentration preferably of no more than 10%, and, more preferably still of no more than 5%, by mass on a dry basis relative to the hydraulic binder composition, with the condition that (.A.4.) is different from (.A.2.) and (.B.4).

[0033] Furthermore, it is advantageous that the hydraulic admixture composition (ABCD) according to the invention, particularly when it is a fluid formulation of concrete or mortar, has a ratio (C) / (A) of less than 0.5 and possibly within the following ranges in increasing order of preference: 0.15 < (C) / (A) < 0.5; 0.2 < (C) / (A) < 0.48; 0.25 < (C) / (A) < 0.45.

[0034] The low carbon wet hydraulic composition according to the invention can also be characterized by a volume of cement paste (ABC), i.e. hydraulic composition (ABC) without aggregates (D), less than or equal to -in kg / m3 of hydraulic composition comprising (ABCD), in an increasing order of preference- 900; 800; 700; 600; 500 and greater or equal to -in kg / m3 of hydraulic composition comprising (ABCD) in ascending order of preference- 50; 100; 200; 250; 300.

[0035] The mass of binder (A) relative to the volume V of the hydraulic composition (ABCD) according to the invention can also be a parameter to be taken into consideration in defining this composition according to the invention. Thus, this binder density A / V is within the following ranges – in kg / m³ and in ascending order of preference: - in the case where the hydraulic admixture composition comprising (ABCD) according to the invention is a ready-mix concrete preparation for prefabrication, a concrete preparation for the manufacture of hardened concrete structures, a screed preparation or a repair mortar preparation: 100 < A / V < 900; 200 < A / V < 650; 280 < A / V < 500.

[0036] The mass of binder (A) relative to the total dry mass Mst of the components, in particular (ABD) of the hydraulic additive composition comprising (ABCD) according to the invention, may be another parameter to be taken into consideration in defining this composition according to the invention. Thus, this mass of binder A / Mst is within the following ranges – as a percentage by mass on a dry basis relative to the total mass Mst and in ascending order of preference: - in the case where the hydraulic additive composition comprising (ABCD) according to the invention is an industrial mortar preparation: 10 < A / Mst< 70; 15 < A / Mst< 60; 20 < A / Mst < 50.

[0037] Advantageously, the hydraulic adjuvant composition according to the invention comprises functional additives (E) qualitatively and / or quantitatively different from those of the adjuvant composition (B).

[0038] According to one possibility, the low carbon hydraulic composition according to the invention is a concrete composition.

[0039] According to another possibility, the low carbon hydraulic composition according to the invention is a mortar composition.

[0040] According to another aspect of it, the invention relates to a premix for the preparation of the hydraulic adjuvant composition according to the invention comprising: -Pmi- an adjuvant composition (B) comprising; relative to the total dry mass of active ingredients in the adjuvant composition: (.B. 1.) 35% to 60% by mass of at least one water-reducing or high-water-reducing adjuvant chosen from polycarboxylate polyalkoxylated adjuvants, (.B.2.) 25% to 45% by mass of at least one water-reducing or high-strength water-reducing adjuvant chosen from polyalkoxylated phosphonates, (.B.3.) from 0.01% to 15% by mass of at least one rheological agent, (.B.4.) from 0.1% to 15% by mass of a calcium salt, (.B.5.) of 0.1% to 3% by mass of at least one antifoaming agent and / or at least one air-entraining agent, and (.B.6.) 0.05% to 1% by mass of biocidal agent(s); and at least one of the following ingredients: -Pm2- and at least one of the following ingredients: (.Al) at least one source of clinker, lime, or a mixture of these; (A.2.) at least one mineral addition, (A.3.) at least one filler in a concentration of at least 15% by mass on a dry basis relative to the hydraulic binder composition, (.A.4.) and at least one activator comprising a sulfate source and / or a sulfite ion source and / or at least one activator other than those consisting of a sulfate source of sulfate ions and / or sulfite ions, in a concentration preferably of not more than 10%, and, more preferably still of not more than 5%, by mass on a dry basis relative to the hydraulic binder composition, with the condition that (.A.4.) is different from (.A.2.) and (.B.4); (.E.) at least one additive (E) qualitatively and / or quantitatively different from (.A.2.), from (.A.4.) and from those of the composition (B) of adjuvants, (C) of water; (D) at least one aggregate.

[0041] Indeed, according to the invention, the adjuvant composition (B) can be premixed with the binder composition (A) and / or with at least one of the other components (C), (D), (E),...of the low carbon hydraulic composition considered.

[0042] According to another aspect of the invention, the invention relates to a kit comprising at least some of the components of the hydraulic composition with admixture, in particular when the latter is a fluid concrete or mortar, according to the invention and / or the premix according to the invention, as well as instructions for the preparation of the hydraulic composition with admixture according to the invention, preferably with a ratio C) / (A) of less than 0.5 and possibly within the following ranges in ascending order of preference: 0.15 < (C) / (A) < 0.5; 0.2 < (C) / (A) < 0.48; 0.25 < (C) / (A) < 0.45.

[0043] According to another aspect of it, the invention relates to a method of manufacturing the hydraulic adjuvant composition (A) according to the invention consisting essentially of mixing (A) (B) (C) & (D) and possibly at least one other component, for example at least one additive (E) qualitatively and / or quantitatively different from (B) and / or the premix according to the invention with (A) (B) (C) and / or (D) and possibly at least one other component, for example at least one additive (E) qualitatively and / or quantitatively different from (B).

[0044] Preferably, this method of manufacturing the adjuvanted hydraulic composition (A) is characterized in that it includes a prior protocol P for determining the required dosage of rheological agent (B.3.) in the adjuvanted hydraulic composition (A).

[0045] According to another aspect of it, the invention relates to a process for producing ready-mix concrete or concrete for prefabrication, with the hydraulic composition admixed according to the invention, and / or with the premix according to the invention.

[0046] According to another aspect of it, the invention relates to a process for producing screeds, repair mortars, floor coverings, tile adhesives, joints, or technical mortars, with the hydraulic composition admixed according to the invention and / or with the premix according to the invention.

[0047] According to another aspect of the invention, the invention relates to hardened or partially hardened products derived from the hydraulic composition enhanced according to the invention, these hardened products comprising and / or being obtained from: -Pdl- a hydraulic binder composition (A) comprising: (.Al) at least one source of clinker, lime, or a mixture of these; (A.2.) at least one mineral addition, and, possibly, at least one of the following components: (A.3.) at least one filler in a concentration of at least 15% by mass on a dry basis relative to the hydraulic binder composition, (.A.4.) and at least one activator comprising a sulfate source and / or a sulfite ion source and / or at least one activator other than those consisting of a sulfate source of sulfate ions and / or sulfite ions, in a concentration preferably of no more than 10%, and, more preferably still of no more than 5%, by mass on a dry basis relative to the hydraulic binder composition, with the condition that (.A.4.) is different from (.A.2.) and (.B.4); -Pd2- an adjuvant composition (B) comprising; relative to the total dry mass of active ingredients in the adjuvant composition: (.B. 1.) 35% to 60% by dry mass of at least one water-reducing or high-water-reducing adjuvant chosen from polycarboxylate polyalkoxylated adjuvants, (.B.2.) 25% to 45% by mass on a dry basis of at least one water-reducing or high-strength water-reducing adjuvant chosen from among the polyalkoxylated phosphonates, (B.3.) from 0.01% to 15% by mass on a dry basis of at least one rheological agent, (B.4.) from 0.1% to 15% by mass on a dry basis of a calcium salt, (.B.5.) of 0.1% to 3% by dry mass of at least one antifoaming agent and / or at least one air-entraining agent, and (.B.6.) of 0.05% to 1% by mass on a dry basis of biocidal agent(s); -Pd3- and possibly at least one of the following ingredients: (.E.) at least one additive (E) qualitatively and / or quantitatively different from (.A.2.), from (.A.4.) and from those of the composition (B) of adjuvants, (C) of water; (D) at least one aggregate.

[0048] According to another aspect of it, the invention relates to the use of the adjuvant composition (B) according to the invention, and / or the premix according to the invention, to reduce the viscosity of hydraulic compositions based on low carbon hydraulic mineral binders. Definitions

[0049] The definitions below are given by way of example to facilitate the interpretation of this statement: * any singular can refer to a plural and vice versa. * “approximately”; “about”; “in the order of”: + / - 10% of the relevant unit of measurement in the International System of Units. * The term "cement" refers to a powdered substance intended for the manufacture of mortar or concrete. It consists of mineral binders, possibly free from any organic compounds. This includes all ordinary cements, including ordinary Portland cement, mixtures of ordinary Portland cement, according to standards EN 197-1, EN 197-5, EN 197-6, natural hydraulic limes, hydraulic limes, and alkali-based cements. * By "clinker" we mean the main constituent phase of ordinary Portland cement obtained by co-calcination of limestone and an aluminosilicate source. * The term "slag" refers to a stony by-product separated from metals during the smelting or refining of ore. * "GGBS" or "GGBFS": "Ground Granulated Blast Slag" or "Ground Granulated Blast Furnace Slag", that is to say in French "ground granulated blast furnace slag" or "ground granulated blast furnace slag" or "blast furnace slag" or "ground blast furnace slag powder". * The term "pozzolanic material" or "pozzolana" refers to a powdery substance that hardens by the addition of a mixture of water and a source of CaO, of natural origin or derived from a natural resource, to which a temperature-controlled treatment has been applied. * By "wet hydraulic composition" we mean a material composed of binder(s), aggregates such as sand and gravel and other components, such as admixtures and water. * By "dry hydraulic composition," we mean a material composed of binder(s), aggregates such as sand and gravel, and other components, such as admixtures. Such a composition is in powder form and ready to be mixed with water. In other words, the dry concrete composition or the dry industrial mortar composition of the invention may contain some moisture, but it essentially contains solid components which are intended to be mixed with water before application. * By “hardened product”, we mean a solid object obtained by hardening a wet hydraulic composition after reaction and evaporation of the water. * The term “mortar” refers to a material composed of binder(s), aggregates such as sand and other components, such as additives. Detailed description

[0050] Additive hydraulic composition

[0051] This composition according to the invention comprises a composition (A) of hydraulic binder, a composition (B) of adjuvant, water (C), at least one aggregate (D), optionally other ingredients including other functional additives (E) different from those of composition (B).

[0052] This composition ABCD(E) is a wet hydraulic composition which hardens in a given time (setting time) after mixing of water (C) with the other components ABD(E).

[0053] Composition (A) of hydraulic binder

[0054] The binder composition (A) according to the invention comprises - in % by mass on dry basis, relative to composition (A), and in ascending order of preference - between 1 and 55, 5 and 49, 10 and 40, (.AL) of at least one source of clinker, lime or a mixture thereof.

[0055] (.AL) Source of clinker and / or lime

[0056] In preferred embodiments, the clinker source is Portland clinker, in particular as defined in the book "Cernent Chemistry" (Harry FW Taylor, 2nd edition, Academy Press, 1990) or, according to standard NF EN 197-1 §5.2.1, Portland cement, or a mixture thereof.

[0057] Lime may include, in particular: hydraulic lime, calcium hydroxide, quicklime, milk of lime, or a mixture of these.

[0058] Preferably, the hydraulic binder composition (A) has a quantity of lime and / or clinker source (QC) less than or equal to 55% by mass relative to the total mass of the hydraulic binder composition, this quantity of clinker being, for example, - as a % by mass relative to the total mass of the hydraulic binder composition and in ascending order of preference: 0.01 < (QC) < 49; 1 < (QC) < 48; 5 < (QC) < 45; 5 < (QC) < 40; 10 < (QC) < 35.

[0059] The clinker is in particular Portland or aluminous or sulfo-aluminous clinker, preferably Portland clinker as defined in the book "Cernent Chemistry". Harry FW Taylor. Edition, 2nd, Academy Press, 1990).

[0060] (.A, 10.) Components of the hydraulic binder composition (A) other than the source of clinker and / or lime from (AL)

[0061] The hydraulic binder composition (A) comprises at least one compound or mixture of compounds having the property of hydrating in the presence of water and whose hydration makes it possible to obtain a solid having mechanical characteristics.

[0062] The hydraulic binder composition may include, in particular, in addition to the clinker source and / or lime (AL), aluminous or sulfo-aluminous clinker, a cement according to standard EN 197-1 (2012), in particular a CEM I, CEM II, CEM III, CEM IV or CEM V cement; a cement according to standard EN 197-5 (2021), in particular a CEM ILC / M or CEM VI cement; a cement according to standard EN 197-6 (2023), a super-sulfated cement according to standard EN 15743+A1 (2015).

[0063] (.A.2.) Mineral addition

[0064] The concentration in (.A.2.) - expressed as % by mass on a dry basis, relative to the composition (A), and in an increasing order of preference - is, for example: 5 < (A2) < 80; 10 < (A2) < 75; 15 < (A2) < 50.

[0065] The mineral addition (.A.2.) is chosen from the group comprising -preferably composed of-: Granulated blast furnace slag (as defined in EN 197-1:2011, paragraph 5.2.2) (GGBS), crystallized, expanded, vitrified blast furnace slag (granulated or pelletized), conversion steelmaking slag, electric arc furnace carbon steelmaking slag, ladle slag, natural or artificial pozzolanic materials (as defined in EN 197-1:2011, paragraph 5.2.3), fly ash (as defined in EN 197-1:2011, paragraph 5.2.4), calcined shale (as defined in EN 197-1:2011, paragraph 5.2.5), crushed shale, quartz, silica fume (as defined in EN 197-1:2011, paragraph 5.2.5). 5.2.7 or EN 197-5:2021 paragraph 5), calcined clays, recycled glass, zeolites, diatomaceous earth, recycled concrete fines from deconstruction, or any mixture thereof.

[0066] Preferably, the mineral addition (.A.2.) is chosen from the group comprising -preferably composed of-: calcium sulfates, calcined clays, limestones, natural or artificial pozzolans, fly ash and blast furnace slags, and even more particularly among calcium sulfates, calcined clays, limestones, natural or artificial pozzolans, blast furnace slags, and any mixtures thereof.

[0067] More preferably, the mineral addition (.A.2.) is chosen from the group comprising -preferably composed of-: calcium sulfates, pozzolanic materials such as calcined clays, limestones, blast furnace slags, and any mixtures thereof.

[0068] A pozzolanic material is a material capable of reacting with lime or cement, in the presence of water, to produce hydrates. In other words, a pozzolanic material is a material that improves the hydraulic behavior of Portland cement and lime, hydraulic behavior being the setting and hardening capacity in the presence of water.

[0069] Preferably, the pozzolanic material is chosen from the group comprising, preferably, silica fumes, natural pozzolana, volcanic ash, pumice stone, zeolitized tuff, argillated tuff, fly ash, calcined shale, metakaolin, calcined clays, in particular illite, bentonite, montmorillonite, smectite, used glass powder, calcined clays, in particular illite, bentonite, montmorillonite, smectite, biomass ash, rice husk ash, diatomaceous earth, used glass powder, crushed opal, basic carbonate oxygen converter slag, carbonized olivine, carbonized wollastonite and mixtures thereof.

[0070] The mineral addition (.A.2.) other than clinker may be any material capable of forming part of the composition of a hydraulic binder.

[0071] In a particular embodiment, the hydraulic binder composition (A) comprises, in addition to (.Al) (.A.2.) & possibly (A. 10.), at least one of the following components: (A.3.) at least one filler in a concentration of at least 15% by mass on a dry basis relative to the composition (A) of hydraulic binder, (.A.4.) and a source of sulfate ions and / or sulfite ions and / or at least one activator different from those consisting of a source of sulfate ions and / or sulfite ions, in a concentration of not more than 10% by mass on a dry basis relative to the hydraulic binder composition, with the condition that (.A.4.) is different from (.A.2.) and (.B.4.).

[0072] (.A.3.) Filler

[0073] * The term “filler” or “filler” refers to a material whose main role in a The binder's action is more physical than chemical. The filler is a finely granulated inorganic material that generally does not exhibit high hydraulic reactivity. Fillers occupy the interstitial spaces and are used to replace hydraulic binders and additional cementitious materials, as they consume less energy. The term "filler" here refers to crushed limestone, crushed dolomite, marble powder, silica sands, fine aggregates of recycled concrete or a mixture thereof.

[0074] The concentration of filler (.A.3.) - expressed as % by mass on a dry basis, relative to the composition (A), and in ascending order of preference - is for example between 15% and 75%, 20% and 70%, 25% and 65%, 35% and 60%.

[0075] Preferably, the filler (.A.3.) is a calcareous filler, more preferably, the filler is a natural material from a stone quarry, and, even more preferably, chosen from the group comprising - better still composed of calcite and its polymorphs, such as aragonite or vaterite, dolomite, precipitated calcium carbonates, quartz and their mixtures.

[0076] (.A.4.) SO3 / SO4 / Activator

[0077] The concentration in (.A.4.) - expressed as % by mass on a dry basis, relative to the mass of the components (.Al) -or even (.A. 10.)- (.A.2.) and (.A.3.) of the composition (A), and in ascending order of preference - is for example between 0.1 and 10, 0.5 and 8, 0.8 and 6, 1 and 5.

[0078] Preferably, the SO3 / SO4 source is sodium sulfate, potassium sulfate, calcium sulfate, lithium sulfate, anhydride sulfate, recycled gypsum or a mixture of at least two of these.

[0079] Preferably, the activator, other than those consisting of a source of sulfate ions and / or sulfite ions, is an alkali metal salt, an alkanolamine or a mixture thereof, preferably said alkali metal salt is chosen from the group comprising, more preferably consisting of, sodium chloride, potassium chloride, lithium chloride, sodium carbonate, potassium carbonate, lithium carbonate, sodium nitrate, potassium nitrate, lithium nitrate, sodium nitrite, potassium nitrite, lithium nitrite, calcium nitrate, calcium nitrite, sodium thiocyanate, potassium thiocyanate, lithium thiocyanate and mixtures thereof, preferably said alkanolamine is chosen from the group comprising, more preferably consisting of, triethanolamine (TEA), triisopropanolamine (TIPA), diethanolamine (DEA) or mixtures thereof.

[0080] In a particularly preferred embodiment, the activator is chosen from the group comprising sodium sulfate, TIPA and their mixtures.

[0081] Advantageously, the activator (.A.4.) can be premixed, in particular during grinding, with all or part of the constituents of (A) other than (.A.4.).

[0082] Premixtures of the activator (.A.4.) with at least one of the constituents of (A) other than (.A.4.), may be other subjects of this presentation.

[0083] Examples of hydraulic binder composition (A)

[0084] The hydraulic binder composition may in particular be such as those described, in particular, in the examples of patent applications EP4330206A1, EP4330208A1, WO2024023065A1 or WO2024023066A1.

[0085] Composition (B) of adjuvant

[0086] (.B. 1.) Water-reducing admixture or high water reducer selected from the polyalkoxylated polycarboxylates

[0087] The adjuvant composition (B) of the invention comprises at least one water-reducing or high-water-reducing adjuvant (.Bl) selected from polycarboxylate polyalkoxylated polymers.

[0088] Preferably, the polycarboxylate polyalkoxylated polymers comprise units of formulas (I) and (II), and optionally units of formula (III), as follows: in which - “R2” and “R3” each independently represent a hydrogen or a methyl group, - "M" each independently represents H+ or a valence cation v chosen from an alkali metal cation, an alkaline earth metal cation, a divalent or trivalent metal cation, an ammonium cation or an organic ammonium cation, - when "M" represents H+, "v" represents 1, and when "M" represents a cation as defined above, "v" is the valence of the cation M, - “R7” and “R8” each independently represent a hydrogen, a methyl, or a group of formula -CO00(M)i / v with M and v as defined above, - "m" represents 0, 1 or 2, - "p" represents 0 or 1, - "X" is O or NR9, "R9" representing H, a C1-C20 alkyl group, a cycloalkyl group, or an alkylaryl group, and - "RI" represents a C1-C20 alkyl group, a cycloalkyl group, an alkylaryl group, or -[Alkyl-O]z-R6, in which the "Alkyl" of each [Alkyl-O] unit independently represents a linear or branched alkylene comprising from 2 to 4 carbon atoms, and "R6" represents H, an alkyl group in Cl to C2O, a cyclohexyl group or an alkylaryl group, and "z" is an integer from 2 to 250, - "a" is a number from 0.05 to 0.95, "a" being the mole fraction of formula (I) units in the polymer, - "b" is a number ranging from 0.05 to 0.95, "b" being the mole fraction of formula (II) units in the polymer, - “L” represents a bonding group to the main chain of the polymer, and is in particular chosen from a direct bond (no atom between the main chain and the W group or the carbon bearing the RI 1 group), an oxygen atom, an -NR12- ​​group, R12 being a hydrogen or an alkyl group in Cl to C6, and an alkylene group in C1-C6, preferably L is an oxygen atom or an -NR12- ​​group, advantageously L is an oxygen atom, - n = 0 or 1, and if n = 1, "W" is a spacer group, in particular a C20 Cl alkylene group preferably in C1-C6, possibly substituted, or a group of formula -[Alkyl-O]t- in which the "Alkyl" of each [Alkyl-O] unit independently represents an alkylene group comprising 2 to 4 carbon atoms, and "t" is an integer ranging from 1 to 500, preferably W is a C6 Cl alkylene group, - "RIO" each independently represents a monovalent group, in particular chosen from a hydrogen, a C6 Cl alkyl group, and a group of formula -[Alkyl-O]t-R13 in the "Alkyl" of each unit [Alkyl-O] each independently represents an alkylene group of 2 to 4 carbon atoms, "t" is an integer ranging from 1 to 500 and "R13" is chosen from a hydrogen and a C3 Cl alkyl, or "RIO" is a cation, in particular an alkali, alkaline earth or ammonium cation (and then the last O of the -[Alkyl-O]t group is O); - "RI 1" is a monovalent group, in particular is chosen from a hydrogen atom, a hydroxyl group and an alkyl group in Cl to CIO, preferably "RI 1" is a hydroxyl group; and - "c" is a number from 0 to 0.15, "c" being the mole fraction of formula (III) units in the polymer.

[0089] An atom or group of atoms defined as "representing independently" or "each representing independently" means that each of these atoms or groups of atoms can each be different from one unit of the polymer to another.

[0090] Preferably, polycarboxylate polyalkoxylated polymers have a comb-like structure.

[0091] The following embodiments for the formulas (I), (II) and (III) of the polycarboxylate polyalkoxylated polymer units can be considered independently or combined with each other in any combination: - “R2” represents H, and / or - “R7” represents H, and / or - "R3" each independently represents a hydrogen or a methyl, and / or - "R8" each independently represents a hydrogen or a methyl, and / or - either p = 0 and m = 1 or 2, preferably 1, or p = 1 and m = 0, and / or - X = O, and / or - RI = -[Alkyl-O]z-R6, preferably with: - “Alkyl” represents -CH2-CH2-, -CH2-CH2-CH2-, -CH2-CH2-CH2-CH2-, -CH2-CHMe-, -CHMe-CH2-, and / or - at least 80% of the Alkyls in the -[Alkyl-O]z- group represent -CH2-CH2-, or even all the Alkyls in the -[Alkyl-O]z- group represent -CH2-CH2-, and / or - "z" represents an integer from 5 to 200, specifically from 10 to 100, preferably from 25 to 75, and / or - “R6” represents H or Me, and / or - “M” represents H or a monovalent or divalent cation, “m” then representing 1 or 2, the monovalent cation preferably being chosen from an ammonium salt NH4+, a primary, secondary, tertiary or quaternary ammonium cation and an alkali metal cation, such as a sodium, lithium or potassium ion, and the divalent cation preferably being an alkaline earth metal cation, such as a magnesium or calcium ion, and / or - "a" is a number from 0.20 to 0.90, preferably "a" is a number from 0.40 to 0.85, and / or - "b" is a number from 0.10 to 0.80, preferably "b" is a number from 0.15 to 0.60, and / or - n = 0, and / or - L is an oxygen atom, and / or - "RIO" is a hydrogen, and / or - “RI 1” is a hydroxyl group, and / or - "c" is a number ranging from 0 to 0.12, preferably from 0 to 0.10.

[0092] Preferably, in units of formula (I): - “R2” represents H, - "R3" each independently represents a hydrogen or a methyl group, - "M" is H, sodium or calcium, preferably H, - "a" is a number ranging from 0.20 to 0.90, preferably "a" is a number ranging from 0.40 to 0.85.

[0093] Preferably, in units of formula (II): - “R7” represents H, - "R8" each independently represents a hydrogen or a methyl group, -X = 0, - RI = -[Alkyl-O]z-R6, preferably with: - “Alkyl” represents -CH2-CH2-, -CH2-CH2-CH2-, -CH2-CH2-CH2-CH2-, -CH2-CHMe-, -CHMe-CH2-, and / or - at least 80% of the "Alkyl" in the group -[Alkyl-O]z- represent -CH2-CH2-, or even all the "Alkyl" in the group -[Alkyl-O]z- represent -CH2-CH2-, and / or - "z" represents an integer from 5 to 200, specifically from 10 to 100, preferably from 25 to 75, and / or - “R6” represents H or Me, - either p = 0 and m = 1 or 2, preferably 1, or p = 1 and m = 0, and - "b" is a number from 0.10 to 0.80, preferably "b" is a number from 0.15 to 0.60.

[0094] Preferably, in the units of formula (III) (if present): -n = 0, - L is an oxygen atom or an -NR12- ​​group, advantageously L is an oxygen atom, - "RIO" each independently represents a hydrogen, a C1-C6 alkyl group, or "RIO" is a cation, in particular an alkali, alkaline earth or ammonium cation, preferably RIO is a hydrogen, - “RI 1” is a hydroxyl group, and - "c" is a number ranging from 0 to 0.12, preferably from 0 to 0.10.

[0095] According to one embodiment, “c” = 0. In other words, the polymer does not comprise formula units (III).

[0096] According to one embodiment (Ml), the formula units (II) of the polycarboxylate polyalkoxylated polymers are such that p = 0 and m = 1 or 2, preferably 1, and "c" = 0.

[0097] Preferably, according to this embodiment (Ml): - “R2” represents H, and / or - “R7” represents H, and / or - "R3" each independently represents a hydrogen or a methyl group, of preference R3 = H and / or - "R8" each independently represents a hydrogen or a methyl group, preferably R8 = Me, and / or - X = O, and / or - RI = -[Alkyl-O]z-R6, preferably with: - “Alkyl” represents -CH2-CH2-, -CH2-CH2-CH2-, -CH2-CH2-CH2-CH2-, -CH2-CHMe-, -CHMe-CH2-, and / or - at least 80% of the Alkyls in the -[Alkyl-O]z- group represent -CH2-CH2-, or even all the Alkyls in the -[Alkyl-O]z- group represent -CH2-CH2-, and / or - "z" represents an integer from 5 to 200, specifically from 10 to 100, preferably from 25 to 75, and / or - "R6" represents H or Me, preferably "R6" represents H, and / or - “M” represents H or a monovalent or divalent cation, “m” then representing 1 or 2, the monovalent cation preferably being chosen from an ammonium salt NH4+, a primary, secondary, tertiary or quaternary ammonium cation and an alkali metal cation, such as a sodium, lithium or potassium ion, and the divalent cation preferably being an alkaline earth metal cation, such as a magnesium or calcium ion, and / or - "a" is a number from 0.30 to 0.95, preferably a is a number from 0.50 to 0.90, and / or - "b" is a number from 0.05 to 0.70, preferably b is a number from 0.10 to 0.50.

[0098] Preferably, according to (M1): - “R2” represents H, - "R3" represents each independently H or a methyl group, advantageously H, - "M" is H, sodium or calcium, preferably H, - “R7” represents H, - "R8" represents each independently H or a methyl, advantageously is a methyl, -X = O, - RI = -[Alkyl-O]z-R6, preferably with: - “Alkyl” represents -CH2-CH2-, -CH2-CH2-CH2-, -CH2-CH2-CH2-CH2-, -CH2-CHMe-, -CHMe-CH2-, and / or - at least 80% of the "Alkyl" in the group -[Alkyl-O]z- represent -CH2-CH2-, or even all the Alkyl in the group -[Alkyl-O]z- represent -CH2-CH2-, and / or - "z" represents an integer from 5 to 200, specifically from 10 to 100, preferably from 25 to 75, and / or - "R6" represents H or Me, preferably "R6" represents H. - "a" is a number from 0.30 to 0.95, preferably "a" is a number from 0.50 to 0.90, and - "b" is a number from 0.05 to 0.70, preferably "b" is a number from 0.10 to 0.50.

[0099] According to another embodiment (M2), the formula units (II) of the polycarboxylate polyalkoxylated polymers are such that p = 1 and m = 0.

[0100] Preferably, according to this embodiment (M2): - “R2” represents H, and / or - “R7” represents H, and / or - "R3" each independently represents a hydrogen or a methyl, and / or - "R8" each independently represents a hydrogen or a methyl, and / or - X = O, and / or - RI = -[Alkyl-O]z-R6, preferably with: - “Alkyl” represents -CH2-CH2-, -CH2-CH2-CH2-, -CH2-CH2-CH2-CH2-, -CH2-CHMe-, -CHMe-CH2-, and / or - at least 80% of the Alkyls in the -[Alkyl-O]z- group represent -CH2-CH2-, or even all the Alkyls in the -[Alkyl-O]z- group represent -CH2-CH2-, and / or - "z" represents an integer from 5 to 200, specifically from 10 to 100, preferably from 15 to 50, and / or - "R6" represents H or Me, preferably R6 represents Me, and / or - “M” represents H or a monovalent or divalent cation, “m” then representing 1 or 2, the monovalent cation preferably being chosen from an ammonium salt NH4+, a primary, secondary, tertiary or quaternary ammonium cation and an alkali metal cation, such as a sodium, lithium or potassium ion, and the divalent cation preferably being an alkaline earth metal cation, such as a magnesium or calcium ion, and / or - "a" is a number from 0.30 to 0.80, preferably "a" is a number from 0.40 to 0.70, and / or - "b" is a number from 0.20 to 0.70, preferably "b" is a number from 0.30 to 0.60, and / or - n = 0, and / or - L is an oxygen atom or an -NR12- ​​group, advantageously L is an oxygen atom, - "RIO" each independently represents a hydrogen, a C1-C6 alkyl group, or "RIO" is a cation, in particular an alkali, alkaline earth or ammonium cation, preferably RIO is a hydrogen, - “RI 1” is a hydroxyl group, and - "c" is a number ranging from 0 to 0.12, preferably from 0 to 0.10.

[0101] Preferably, according to (M2) - “R2” represents H, - "R3" represents each independently either an H or a methyl group, - "M" is H, sodium or calcium, preferably H, - “R7” represents H, - "R8" represents each independently H or a methyl group, -X = 0, - RI = -[Alkyl-O]z-R6, preferably with: - “Alkyl” represents -CH2-CH2-, -CH2-CH2-CH2-, -CH2-CH2-CH2-CH2-, -CH2-CHMe-, -CHMe-CH2-, and / or - at least 80% of the Alkyls in the -[Alkyl-O]z- group represent -CH2-CH2-, or even all the Alkyls in the -[Alkyl-O]z- group represent -CH2-CH2-, and / or - "z" represents an integer from 5 to 200, specifically from 10 to 100, preferably from 15 to 50, and / or - "R6" represents H or Me, preferably "R6" represents Me. - "a" is a number from 0.30 to 0.80, preferably "a" is a number from 0.40 to 0.70, - "b" is a number from 0.20 to 0.70, preferably "b" is a number from 0.30 to 0.60, - L is an oxygen atom, - "RIO" is hydrogen, - “RI 1” is a hydroxyl group, - "c" is a number ranging from 0 to 0.12, preferably from 0 to 0.10.

[0102] According to a particular embodiment (M2-1) of the embodiment in which the formula units (II) of the polycarboxylate polyalkoxylated polymers are such that p = 1 and m = 0, the polymer comprises units (III).

[0103] Thus, "c" is preferably strictly greater than 0. Preferably, "c" is a number from 0.005 to 0.15, preferably from 0.01 to 0.12, preferably from 0.02 to 0.010, preferably from 0.04 to 0.08.

[0104] According to this alternative (M2-1), - “R2” represents H, and / or - “R7” represents H, and / or - "R3" each independently represents a hydrogen or a methyl group, preferably a methyl group, and / or - "R8" each independently represents a hydrogen or a methyl group, preferably a methyl group, and / or - X = O, and / or - RI = -[Alkyl-O]z-R6, preferably with: - “Alkyl” represents -CH2-CH2-, -CH2-CH2-CH2-, -CH2-CH2-CH2-CH2-, -CH2-CHMe-, -CHMe-CH2-, and / or - at least 80% of the Alkyls in the -[Alkyl-O]z- group represent -CH2-CH2-, or even all the Alkyls in the -[Alkyl-O]z- group represent -CH2-CH2-, and / or - "z" represents an integer from 5 to 200, specifically from 10 to 100, preferably from 15 to 50, and / or - "R6" represents H or Me, preferably R6 represents Me, and / or - “M” represents H or a monovalent or divalent cation, “m” then representing 1 or 2, the monovalent cation preferably being chosen from an ammonium salt NH4+, a primary, secondary, tertiary or quaternary ammonium cation and an alkali metal cation, such as a sodium, lithium or potassium ion, and the divalent cation preferably being an alkaline earth metal cation, such as a magnesium or calcium ion, and / or - "a" is a number from 0.30 to 0.80, preferably "a" is a number from 0.40 to 0.70, and / or - "b" is a number from 0.20 to 0.70, preferably "b" is a number from 0.30 to 0.60, and / or - n = 0, and / or - L is an oxygen atom or an -NR12- ​​group, advantageously L is an oxygen atom, - "RIO" each independently represents a hydrogen, a C1-C6 alkyl group, or "RIO" is a cation, in particular an alkali, alkaline earth or ammonium cation, preferably RIO is a hydrogen, - “RI 1” is a hydroxyl group, and - "c" is a number ranging from 0.005 to 0.15, preferably from 0.01 to 0.12, preferably from 0.02 to 0.010, preferably from 0.04 to 0.08.

[0105] According to another embodiment (M3), the formula units (II) are present in the form of two distinct subunits (Ilb') and (Ilb”). Both subunits (Ilb') and (Ilb”) are of formula (II), according to any embodiment of the formula units (II) defined above, but are different from each other. The units (I) and (III), if present, are of formula (II), according to any embodiment defined above.

[0106] Preferably, according to this embodiment, “a” is a number from 0.30 to 0.80, preferably from 0.40 to 0.70, alternatively from 0.25 to 0.50, “a” being the mole fraction of formula units (I) in the polymer, “b’” is a number from 0.10 to 0.35, preferably from 0.15 to 0.30, alternatively from 0.10 to 0.25, “b’” being the mole fraction of units (Ilb’) in the polymer, and “b”” is a number from 0.10 to 0.35, preferably from 0.15 to 0.30, alternatively from 0.25 to 0.50, where "b" is the mole fraction of units (Ilb") in the polymer.

[0107] Preferably, according to this embodiment, “c” = 0. Preferably, the polymer therefore does not comprise (III) units.

[0108] Preferably, in units (Ilb'): - “R7” represents H, - "R8" each independently represents a hydrogen or a methyl, preferably R8 = Me, - either p = 0 and m = 1 or 2, preferably 1, or p = 1 and m = 0, preferably p = 1 and m = 0, -X = 0, - RI = -[Alkyl-O]z-R6, preferably with: - “Alkyl” represents -CH2-CH2-, -CH2-CH2-CH2-, -CH2-CH2-CH2-CH2-, -CH2-CHMe-, -CHMe-CH2-, and / or - at least 80% of the Alkyls in the -[Alkyl-O]z- group represent -CH2-CH2-, or even all the Alkyls in the -[Alkyl-O]z- group represent -CH2-CH2-, and / or - "z" represents an integer from 5 to 200, specifically from 10 to 100, preferably from 15 to 50, preferably R8 = Me, and / or - "R6" represents H or Me, preferably "R6" represents H. - "b'" is a number from 0.10 to 0.35, preferably from 0.15 to 0.30, alternatively from 0.10 to 0.25, where "b'" is the mole fraction of formula units (Ilb') in the polymer.

[0109] Preferably, in units (Ilb”): - “R7” represents H, - "R8" each independently represents a hydrogen or a methyl, preferably R8 = Me, - either p = 0 and m = 1 or 2, preferably 1, or p = 1 and m = 0, preferably p = 1 and m = 0, -X = 0, - RI = -[Alkyl-O]z-R6, preferably with: - “Alkyl” represents -CH2-CH2-, -CH2-CH2-CH2-, -CH2-CH2-CH2-CH2-, -CH2-CHMe-, -CHMe-CH2-, and / or - at least 80% of the Alkyls in the -[Alkyl-O]z- group represent -CH2-CH2-, or even all the Alkyls in the -[Alkyl-O]z- group represent -CH2-CH2-, and / or - "z" represents an integer from 5 to 200, specifically from 10 to 100, preferably from 15 to 30, alternatively from 5 to 15, and / or - "R6" represents H or Me, preferably "R6" represents Me. - "b" is a number from 0.10 to 0.35, preferably from 0.15 to 0.30, alternatively from 0.25 to 0.50, "b" being the mole fraction of formula units (Ilb") in the polymer.

[0110] Preferably, the water-reducing or high-water-reducing adjuvant chosen from polyalkyl polycarboxylates is a mixture of at least two, or even at least three, polyalkyl polycarboxylate polymers as defined above.

[0111] More preferably, the water-reducing or high-reducing adjuvant chosen from polyalkyl polycarboxylates comprises a mixture: - of at least one polycarboxylate polyalkoxylated polymer comprising units of formulas (I) and (II) in which p = 0, m = λtc = 0 according to any corresponding embodiment defined above, preferably according to embodiment (M1) as described above, - of at least one polycarboxylate polyalkoxylated polymer comprising units of formulas (I) and (II) and (III) in which p = 1, m = 0 and c is strictly greater than 0, according to any corresponding embodiment defined above, preferably according to embodiment (M2-1) as described above. Advantageously, the water-reducing or high-reducing adjuvant chosen from among the polyalkyl polycarboxylates comprises a mixture: - of a first polycarboxylate polyalkoxylated polymer comprising units of formulas (I) and (II) in which p = 0, m = 1 and c = 0, preferably according to embodiment (Ml) as described above, - of a second polycarboxylate polyalkoxylated polymer comprising units of formulas (I) and (II) in which p = 0, m = 1 and c = 0, and different from the first polycarboxylate polyalkoxylated polymer, and - of a third polycarboxylate polyalkoxylated polymer comprising units of formulas (I) and (II) and (III) in which p = 1, m = 0 and c is strictly greater than 0, according to any corresponding embodiment defined above, preferably according to embodiment (M2-1) as described above.

[0112] Even more advantageously: - the first polycarboxylate polyalkoxylated polymer is such that "a" is a number from 0.30 to 0.70, preferably "a" is a number from 0.50 to 0.70, and "b" is a number from 0.25 to 0.70, preferably "b" is a number from 0.30 to 0.60, - the second polycarboxylate polyalkoxylated polymer is such that "a" is a number from 0.70 to 0.95, preferably "a" is a number from 0.75 to 0.90, and "b" is a number from 0.05 to 0.25, preferably "b" is a number from 0.10 to 0.20.

[0113] Preferably, the first and second polycarboxylate polyalkoxylated polymers differ only in the value of "a" and "b".

[0114] Thus, preferably, in the first and second polycarboxylate polyalkoxylated polymers: - “R2” represents H, - "R3" represents each independently H or a methyl group, advantageously H, - "M" is H, sodium or calcium, preferably H, - “R7” represents H, - "R8" represents each independently H or a methyl group, advantageously a methyl group, -X = 0, - RI = -[Alkyl-O]z-R6, preferably with: - “Alkyl” represents -CH2-CH2-, -CH2-CH2-CH2-, -CH2-CH2-CH2-CH2-, -CH2-CHMe-, -CHMe-CH2-, and / or - at least 80% of the "Alkyl" in the group -[Alkyl-O]z- represent -CH2-CH2-, or even all the Alkyl in the group -[Alkyl-O]z- represent -CH2-CH2-, and / or - "z" represents an integer from 5 to 200, specifically from 10 to 100, preferably from 25 to 75, and / or - "R6" represents H or Me, preferably "R6" represents H.

[0115] Preferably, in the third polycarboxylate polyalkoxylated polymer: - “R2” represents H, and / or - “R7” represents H, and / or - "R3" each independently represents a hydrogen or a methyl group, preferably a methyl group, and / or - "R8" each independently represents a hydrogen or a methyl group, preferably a methyl group, and / or - X = O, and / or - RI = -[Alkyl-O]z-R6, preferably with: - “Alkyl” represents -CH2-CH2-, -CH2-CH2-CH2-, -CH2-CH2-CH2-CH2-, -CH2-CHMe-, -CHMe-CH2-, and / or - at least 80% of the Alkyls in the -[Alkyl-O]z- group represent -CH2-CH2-, or even all the Alkyls in the -[Alkyl-O]z- group represent -CH2-CH2-, and / or - "z" represents an integer from 5 to 200, specifically from 10 to 100, preferably from 15 to 50, and / or - "R6" represents H or Me, preferably R6 represents Me, and / or - "M" represents H or a monovalent or divalent cation, "m" then representing 1 or 2, the monovalent cation preferably being chosen from an ammonium salt NH4+, a primary, secondary, tertiary or quaternary ammonium cation and a cation of an alkali metal, such as a sodium, lithium or potassium ion, and the divalent cation preferably being a cation of an alkaline earth metal, such as a magnesium or calcium ion, and / or - "a" is a number from 0.30 to 0.80, preferably "a" is a number from 0.40 to 0.70, and / or - "b" is a number from 0.20 to 0.70, preferably "b" is a number from 0.30 to 0.60, and / or - n = 0, and / or - L is an oxygen atom or an -NR12- ​​group, advantageously L is an oxygen atom, - "RIO" each independently represents a hydrogen, a C1-C6 alkyl group, or "RIO" is a cation, in particular an alkali, alkaline earth or ammonium cation, preferably RIO is a hydrogen, - “RI 1” is a hydroxyl group, and - "c" is a number ranging from 0.005 to 0.15, preferably from 0.01 to 0.12, preferably from 0.02 to 0.010, preferably from 0.04 to 0.08.

[0116] Alternatively, the second polyalkyloxylated polycarboxylate polymer may be according to embodiment (M3) as described above, in which the formula units (II) are present in the form of two distinct subunits (Ilb') and (Ilb”). The first and third polyalkyloxylated polycarboxylate polymers remain as defined above.

[0117] Preferably, the total mass content of water-reducing adjuvant or high water reducer chosen from polyalkylated polycarboxylates ranges from 40% to 60% by mass, preferably from 44% to 55% by mass, relative to the total dry mass (in active materials) of the adjuvant composition.

[0118] If the adjuvant composition includes several (at least two) water-reducing or high-water-reducing adjuvants selected from polyalkyl polycarboxylates, the above content ranges therefore refer to the total content of all the water-reducing or high-water-reducing adjuvants selected from polyalkyl polycarboxylates, relative to the total dry mass (of active materials) of the adjuvant composition.

[0119] In particular, the mass content of first polycarboxylate polyalkoxylated polymer ranges from 15% to 35% by mass, preferably from 20% to 30% by mass, relative to the total dry mass (in active materials) of the adjuvant composition.

[0120] In particular, the mass content of the second polycarboxylate polyalkoxylated polymer ranges from 5% to 20% by mass, preferably from 8% to 12% by mass, relative to the total dry mass (in active materials) of the adjuvant composition.

[0121]

[0122]

[0123]

[0124] In particular, the mass content of the third polycarboxylate polyalkoxylated polymer ranges from 5% to 20% by mass, preferably from 8% to 20% by mass, relative to the total dry mass (of active materials) of the adjuvant composition. (.B.2.) Water-reducing admixture or high water-reducing agent selected from polyalkoxylated phosphonates The adjuvant composition (B) of the invention comprises at least one water-reducing or high-water-reducing adjuvant (.B.2.) selected from polyalkoxylated phosphonates. Preferably, the polyalkoxylated phosphonate polymers have the following formula (IV):

[0125] in which - "R5" is a hydrogen atom or a monovalent hydrocarbon group comprising 1 to 18 carbon atoms and possibly one or more heteroatoms; - the "Ri" are similar or different from each other and represent an alkylene such as ethylene, propylene, butylene, amylene, octylene or cyclohexene, or an arylene such as styrene or methylstyrene, the "Ri" possibly containing one or more heteroatoms; - “Q” is a hydrocarbon group comprising 2 to 18 carbon atoms and possibly one or more heteroatoms; - "A" is an alkylene group consisting of 1 to 5 carbon atoms; - The "Rj" values ​​are similar or different from each other and can be chosen from: - the group A-PO3H2, A having the aforementioned meaning, - an alkyl group comprising from 1 to 18 carbon atoms and capable of bearing [R5-O(Ri-O)m] groups, R5 and Ri having the aforementioned meanings, - "m" is a number greater than or equal to 0, - "r" is the number of [R5-O(Ri-O)m] groups carried by the set of Rj, - "q" is the number of [R5-O(Ri-O)m] groups carried by Q, the sum - "r+q" is between 1 and 10, - "y" is an integer between 1 and 3, - “Q”, “N” and the “Rj” can together form one or more rings, this or these rings may in addition contain one or more other heteroatoms. In a particularly preferred manner, polyalkoxylated phosphonates consist of a water-soluble or water-dispersible organic compound comprising at least one amino-di-(alkylene-phosphonic) group and at least one polyoxyalkylated chain or at least one of its salts.

[0126] Preferably, the polyalkoxylated phosphonate is a compound of formula (IV) in which: "R5" is a hydrogen atom or a monovalent hydrocarbon group, saturated or unsaturated, comprising 1 to 8 carbon atoms and possibly one or more heteroatoms; the "Ri" represent ethylene or propylene or a mixture of ethylene or propylene, preferably from 60% to 100% of the "Ri" are ethylene groups; “Q” is a hydrocarbon group consisting of 2 to 8 carbon atoms and, possibly, one or more heteroatoms; "A" is the methylene group; Each of the "Rj"s represents the CH2-PO3H2 group; "m" is an integer between 10 and 250; "q" is an integer equal to 1 or 2; "y" is an integer equal to 1 or 2, preferably equal to 1.

[0127] In particular, the polyalkoxylated phosphonate may be a polyalkoxylated phosphonate of formula (IV) in which "R5" is a methyl group, the "Ri" are ethylene and propylene groups, "m" being between 30 and 50, "r+q" is 1, "Q" is a propylene group, "A" is a methylene group, "y" is 1 and "Rj" corresponds to the CH2-PO3H2 group.

[0128] Preferably, the total mass content of water-reducing adjuvant or high water reducer chosen from polyalkoxylated phosphonates is between 30 and 40% by mass, preferably between 35% and 40% by mass on a dry basis, relative to the total dry mass (in active materials) of the adjuvant composition.

[0129] Preferably, the ratio between the total mass content of water-reducing adjuvant or high water reducer selected from polyalkoxylated polycarboxylates and the total mass content of water-reducing adjuvant or high water reducer selected from polyalkoxylated phosphonates is strictly greater than 1, preferably between 1.05 and 2.0, preferably between 1.05 and 1.9.

[0130] (.B.3.) Rheological agent

[0131] The adjuvant composition (B) according to the invention comprises at least one rheological agent.

[0132] The rheological agents of the invention are preferably compounds capable of increasing the yield stress of the paste of a hydraulic composition and / or the viscosity of the paste of a hydraulic composition. These agents are therefore compounds that, in particular, increase the flow rate of a hydraulic composition comprising them.

[0133] It should be noted that the range of content of rheological agent(s) (.B.3.) in the composition (B) of adjuvant of the invention is wide, as it depends on the nature of the rheological agent.

[0134] For a given hydraulic composition (A), in particular a hydraulic composition already treated with one or more reducing agents or high-strength water reducers, the dosage of rheological agent(s) can be adjusted on a case-by-case basis depending on the nature of the rheological agent(s). This dosage is ultimately reflected in the rheological agent(s) content of the additive composition (B).

[0135] This dosage of rheological agent(s) in composition (A) is obtained by implementing a protocol P prior to manufacturing the adjuvanted hydraulic composition (A).

[0136] Protocol P for determining the dosage of rheological agent(s) in composition (A)

[0137] Preferably, the rheological agent(s) and the dosages associated with each rheological agent in a hydraulic composition A already modified, in particular with one or more reducing agents or high water reducers and any other additives (excluding rheological agents) (referred to as the "admixed hydraulic composition under study" in the remainder of Protocol A), is or are determined by means of a series of smear measurements on a Schmidt ring (cylinder with an internal diameter of 60 mm and a height of 50 mm) of a 141 mL volume of paste. The idea is to perform this series of measurements on the paste of the hydraulic composition under study to which one or more rheological agents are to be added, this paste containing an increasingly higher proportion of rheological agent(s), until the appropriate concentration is found.This test is carried out according to the following protocol (protocol P) in a room maintained at a temperature of 20±2°C and a relative humidity of 65+5%: . -1- Preparation of an additive paste by mixing, using a Rayneri mixer equipped with a 350mm shaft length, 8mm shaft diameter, and 80mm disc diameter, at 500 rpm for T0+4 minutes: water, a hydraulic binder composition, one or more reducing agents or high-reducing water agents, and any other additives in the hydraulic binder composition under study. The hydraulic binder composition, the water / binder ratio, the reducing agents or high-reducing water agents and any other additives, and the quantity of reducing agents or high-reducing water agents and any other additives are those of the hydraulic binder composition under study. This additive paste is named Po; T0 corresponds to the first contact between the water and the hydraulic binder composition. -2- Filling the Schmidt ring with a volume of 141 mL of adjuvanted paste Po; -3- At T0+5min: Measurement of the spread over two perpendicular diameters after lifting the cone; -4- The initial spreading value of the paste Po corresponds to the reference value without rheological agent (So); -5- Carry out the same test on other pastes Sb S2, .. .Sx with different dosages of rheological agent than paste So, all other things being equal. The dosage increment can for example be 0.001% of active material of rheological agent relative to the mass of hydraulic binder; -6- Each spread obtained is noted Si, S2,... Sx, x being the last dosage evaluated. -7- The required dosage is obtained when a measured spreading value is between 50 and 93% of So, preferably between 60 and 90% of So, preferably between 60 and 80% of So, preferably between 50 and 93% of So, or alternatively preferably between 80% and 90% of So.

[0138] Preferably, the rheological agent (.B.3.) is chosen from: - polysaccharide gums, for example diutan gums, xanthan gums, welan gums, guar gums and guar ethers, including hydroxyethyl guar, hydroxypropyl guar and carboxymethyl guar, gellan gums, starch and starch ethers, - celluloses and cellulose ethers, including the alkyl, hydroxyalkyl and carboxyalkyl families, - high molar mass polycarboxylates, preferably with a molar mass greater than 100,000 g / mol, preferably with a molar mass greater than 200,000 g / mol, - polyethylene glycol (PEG) and polyethylene glycol monomethyl ether (MPEG), preferably with a molar mass greater than 100,000 g / mol, - latexes, for example those of the methacrylic copolymer and ethyl acrylate ester type, - polyacrylamides, - polyvinyl alcohols, - clays, for example sepiolite and bentonite type clays, - sodium alginates, and - any one of their mixtures.

[0139] Preferably, the rheological agent is chosen from: - polysaccharide gums, for example diutan gums, xanthan gums, welan gums, guar gums and guar ethers, including hydroxyethyl guar, hydroxypropyl guar and carboxymethyl guar, gellan gums, starch and starch ethers, - celluloses and cellulose ethers, including the alkyl, hydroxyalkyl and carboxyalkyl families, - high molar mass polycarboxylates, preferably with a molar mass greater than 100,000 g / mol, preferably with a molar mass greater than 200,000 g / mol, and - any one of their mixtures.

[0140] Preferably, the latexes comprise (or are made of) at least one polymer and / or copolymer selected from the group consisting of homopolymers of (meth)acrylic acid, and esters of these acids having the ester group in Cl to Cl2, such as methyl, ethyl, propyl, butyl, pentyl, hexyl, octyl, 2-ethylhexyl, 2-ethylbutyl, 2-heptylhexyl, copolymers of (meth)acrylic acid and / or esters of these acids having the ester group in Cl to C12, vinyl and (meth)acrylic acid copolymers, vinyl and Cl to C12 ester copolymers, (meth)acrylic acid copolymers, (meth)acrylic acid and (meth)acrylic ester copolymers, styrene-(meth)acrylic copolymers, ethylene-vinyl acetate copolymers, ethylene-(meth)acrylic acid copolymers, acrylic / urethane copolymers, styrene-butadiene copolymers.

[0141] Preferably, the total mass content of rheological agent ranges from 0.01% to 12% by mass, preferably from 0.02% to 10% by mass, preferably from 0.03% to 10% by mass, preferably from 0.04% to 10% by mass, relative to the total dry mass (of active materials) of the adjuvant composition.

[0142] If the adjuvant composition (B) includes several (at least two) rheological agents, the above content ranges therefore refer to the total content of all the rheological agents, relative to the total dry mass (in active materials) of the adjuvant composition (B).

[0143] (.B.4.) Calcium Salt

[0144] Preferably, the calcium salt is different from (.A.2.) and (.A.4) as defined above.

[0145] The adjuvant composition comprises a calcium salt in a mass content ranging from 0.1% to 15% by mass relative to the total dry mass (of active materials) of the adjuvant composition.

[0146] Preferably, the calcium salt is chosen from calcium chloride, calcium nitrate, calcium dihydroxide, calcium oxalate, calcium acetate, calcium thiocyanate, preferably the calcium salt is calcium nitrate or calcium dihydroxide.

[0147] (.B.5.) Antifoaming agent and / or air-entraining agent

[0148] The additive composition comprises at least one antifoaming agent and / or at least one air-entraining agent. Examples of antifoaming agents include, for example, ethoxylated fatty alcohols or amines, and allow modification of the air entrainment provided by the additive composition in the hydraulic composition. These antifoaming and / or air-entraining agents are preferably chosen from among the commonly used antifoaming and / or air-entraining agents known to those skilled in the art.

[0149] Preferably, the adjuvant composition includes at least one antifoaming agent, and optionally at least one air-entraining agent.

[0150] Preferably, the mass content of antifoaming agent and / or air-entraining agent is from 0.3% to 2% by mass, preferably from 0.5% to 1% by mass, relative to the total dry mass of active materials of the adjuvant composition.

[0151] (.B.6.) Biocidal agent(s)

[0152] The adjuvant composition includes at least one biocidal agent, for example isothiazolinones. These molecules help to protect the adjuvant composition from bacterial contamination over time. These biocidal agents are preferably chosen from among the commonly used biocidal agents known to those skilled in the art.

[0153] Preferably, the mass content of biocidal agents is from 0.1% to 0.7% by mass, preferably from 0.2% to 0.5% by mass, relative to the total dry mass of active materials of the adjuvant composition.

[0154] (.B.7.) additional adjuvants

[0155] Other additional additives may be used within the scope of the present invention in addition to the water-reducing agent(s) or high water-reducing agent(s) and the rheological agent(s). These additional additives may be selected by those skilled in the art from among the typical additives found in hydraulic binder compositions and hydraulic compositions.Examples include: carboxylic acids or their salts such as acetic, adipic, gluconic, oxalic, citric, maleic, lactic, tartaric, malonic acids and mixtures thereof; milling agents (including ethylene glycol oligomers or propylene glycol oligomers or mixtures thereof); setting retarders; hardening and setting accelerators such as glycerols, formic acid, lithium salts, aluminum salts, magnesium salts, sodium salts; alkanolamines and mixtures thereof; alkali-earth or aluminum salts; inorganic nanoparticles, for example silica or alumina nanoparticles, calcium carbonate nanoparticles, calcium hydrosilicate (HSC) nanoparticles, and mixtures thereof.

[0156] Preferably, the adjuvant composition further comprises 0 to 2% by mass, preferably 0.1% to 1% by mass of additional adjuvants, relative to the total dry mass of active materials of the adjuvant composition.

[0157] Preferably, the adjuvant composition further comprises an alkanolamine, preferably selected from diethanolisopropanolamine (DEIPA), triisopropanolamine (TIPA), N,N-bis(2-hydroxypropyl)-N-(hydroxyethyl)amine (EDIPA), triethanolamine (TEA), N,N,N',N'-tetrakis(2-hydroxyethyl)ethylenediamine (THEED) and methyldiethanolamine (MDEA), bis-(2-hydroxypropyl)-amine (DIPA) and diethanolamine (DEA), preferably the alkanolamine is diethanolisopropanolamine (DEIPA).

[0158] Form of the adjuvant composition (B)

[0159] Preferably, the adjuvant composition is in the form of a liquid solution, a suspension, preferably aqueous, or a powder, and preferably is in the form of a liquid solution.

[0160] When the admixture composition is in powder form, it may further comprise an additional compound in powder form. This additional compound is preferably selected from ground calcium carbonate, precipitated calcium carbonate, silica, precipitated silica, calcium sulfate (anhydrous or hemihydrate or dihydrate), barium sulfate, granulated blast furnace slag, ground calcined or uncalcined clays, ground zeolite, silicates and aluminosilicates, talc, chalk, ground dolomite, ground expanded perlite, ground diatomite, ground calcined diatomite, ground recycled hardened cementitious materials (including foam concrete) and mixtures thereof. The composition may also comprise colorants.

[0161] When the adjuvant composition is in the form of a suspension or a liquid solution, it further comprises water. The suspension or liquid solution may also comprise dyes.

[0162] Quantitative data on the composition (B) of adjuvant

[0163] Throughout this description, the contents of the additive composition are given relative to the total dry mass of active ingredients in the additive composition. "Active ingredients" means that only those compounds that have an effect on a property of a hydraulic composition containing them are taken into account. Active ingredients or active compounds are to be distinguished from materials (powder or liquid) that are present in the additive composition solely as a diluent, but do not have a significant effect on a rheological property of a hydraulic composition containing them; according to the present invention, they are therefore inert compounds.In particular, a content relative to the total dry mass of active ingredients means that water is not taken into account in the case of a composition in the form of a suspension or liquid solution, and that the additional compound(s) in powder form are not taken into account in the case of a powder composition. Advantageously, the contents are expressed relative to the content. total mass of water reducing agents or high water reducing agents chosen from polyalkyl polycarboxylates, water reducing agents or high water reducing agents chosen from polyalkyl phosphonates, rheological agent(s), calcium salt(s), antifoaming agent(s) and / or air-entraining agent(s), biocidal agent(s), and any additional colorants and / or additives.

[0164] Water (C)

[0165] The water incorporated into the mixture of binder (A), additive (B), and aggregates (D) initiates setting and gives the wet composition its plasticity, and therefore its workability. The quality of the mixing water advantageously conforms to the relevant standards.

[0166] The ratio (C) / (A) of the hydraulic admixture composition (ABCD) according to the invention, in particular when it is a fluid formulation of concrete or mortar, is less than 0.5 and possibly within the following ranges in increasing order of preference: 0.1 < (C) / (A) < 0.45; 0.2 < (C) / (A) < 0.42; 0.25 < (C) / (A) < 0.40, for example 0.30 < (C) / (A) < 0.40.

[0167] Granulate (D) The aggregate(s) differ depending on whether the admixed hydraulic composition ABCD(E) is, in general, a concrete, a specific concrete, such as, for example, ready-mix concrete or concrete for prefabrication, or in general, a mortar, a specific mortar, such as, for example, a screed, a repair mortar, a floor covering, a tile adhesive, a joint, or a technical mortar.

[0168] Aggregates constitute a broad category of particulate materials used in construction, including sands, gravels, crushed stone, slag (non-granulated), recycled concrete, and geosynthetic aggregates. They serve as reinforcement to add strength to the overall products obtained from the admixed hydraulic composition comprising ABCD(E) according to the invention.

[0169] The term "aggregates" refers to a collection of mineral grains with an average diameter of between 0 and 125 mm. According to their diameter, aggregates are classified into one of the following six categories: fine sands, coarse sands, gravels, crushed stone, and ballast (standards EN 12620 and EN 13242+A1). The most commonly used aggregates are: - sands with a diameter of between 0 and 6.3 mm, - coarse sands with a diameter greater than 6.3 mm, - crushed stone with a diameter of between 2 mm and 63 mm.

[0170] Sands are therefore included in the definition of the aggregate(s) (D) of the adjuvanted hydraulic composition ABCD(E) according to the invention.

[0171] Additives (E) qualitatively different from those in the composition (B) of adjuvants

[0172] This (or these) additive(s) (E) may preferably be chosen from the following list:

[0173] - Water retention additive.

[0174] A water-retention additive has the property of retaining mixing water before setting. The water is thus trapped in the wet formulation paste, which improves its adhesion. To a certain extent, less water is absorbed by the substrate.

[0175] The water retention additive is preferably selected from the group comprising: modified celluloses, modified guars, modified cellulose ethers and / or guar ether and mixtures thereof, more preferably consisting of: methylcelluloses, methylhydroxypropylcelluloses, methylhydroxyethylcelluloses and mixtures thereof.

[0176] - Thickener

[0177] The thickener is preferably chosen from the group comprising, preferably consisting of: starch ethers, cellulose ethers and / or gums (for example Welan guar xanthan gum, succinoglycans), modified polysaccharides -preferably among modified starch ethers-, polyvinyl alcohols, polyacrylamides, sepiolites, and mixtures thereof.

[0178] - Pigment

[0179] The possible pigment is preferably chosen from the group comprising, more preferably consisting of: TiO2, iron oxide and mixtures thereof.

[0180] - Flame retardant

[0181] The flame retardant (or flame retardant) increases the fire resistance and / or reduces the flame propagation speed of the composition.

[0182] - Air-entraining additive

[0183] Air-entraining additives (surfactants) are advantageously chosen from the group comprising, more preferably consisting of natural resins, sulfated or sulfonated compounds, synthetic detergents, organic fatty acids and mixtures thereof, preferably from the group comprising, more preferably consisting of lignosulfonates, basic fatty acid soaps and mixtures thereof, and, more preferably from the group comprising, more preferably consisting of sulfonated olefins, sodium lauryl sulfate and mixtures thereof.

[0184] - Delayers

[0185] The retarders are advantageously chosen from the group comprising, preferably, tartaric acid and its salts: sodium or potassium salts, citric acid and its salts: sodium (trisodium citrate) and their mixtures.

[0186] -Other additives (E)

[0187] These other additives (E) [qualitatively and / or quantitatively different from (A.2), (A.4) and those in the composition (B) of adjuvants] may be: plasticizers, fibers, dispersion powders, polymer resins, complexing agents, and / or drying shrinkage reducing agents based on polyols.

[0188] The total content of these other optional additives in the ABCD(E) hydraulic adjuvant composition according to the invention is preferably between 0.1% and 10% by mass of the total dry mass of the composition.

[0189] Applications of the hydraulic adjuvant composition (A)

[0190] The hydraulic composition (A) with added adjuvant according to the invention may be a preparation for: - concrete, e.g. ready-mix concrete or concrete for prefabrication; - a mortar, e.g. a screed, a repair mortar, a floor covering, a tile adhesive, a joint or a technical mortar. For the definition of these terms, reference is made, for example, to the following work: Grand Dicobat - The general dictionary of building - 10th edition.

[0191] Premix for the preparation of the hydraulic composition with additive

[0192] This premix comprises Pmi & Pm2 as defined above.

[0193] The preferred premix can be Pmi & Pm2 with Pm2 corresponding to (.Al) & (.A.2.), or even (.A.3.) and / or (.A.4.).

[0194] Kit comprising at least some of the components of the adjuvanted hydraulic composition and instructions for preparing the adjuvanted hydraulic composition according to the invention

[0195] This is a packaging assembly comprising all or part of the components of the water-free adjuvanted hydraulic composition (C), together with instructions (notice) for the preparation of a wet adjuvanted hydraulic composition according to the invention, with a ratio C) / (A) less than 0.5 and possibly within the following ranges in ascending order of preference: 0.1 < (C) / (A) < 0.45; 0.2 < (C) / (A) < 0.42; 0.25 < (C) / (A) < 0.40.

[0196] Process for manufacturing the adjuvanted hydraulic composition (A)

[0197] The invention also relates to a method for preparing the wet concrete or wet industrial mortar composition described above comprising a mixing step with water of at least one aggregate and the binder composition described above, the binder composition being prepared before the mixing step or in situ during the mixing step from at least some of the different components of the binder composition taken separately and / or in the form of premix(s).

[0198] First, the prior protocol P for determining the required dosage of rheological agent (.B.3.) in the adjuvanted hydraulic composition (A) is implemented.

[0199] In other words, the wet concrete composition or the wet industrial mortar composition can be prepared by two distinct methods.

[0200] In a first method, the binder composition is prepared and then mixed with at least one aggregate. The dry concrete or dry mortar composition is then mixed with water.

[0201] In a second method, the wet concrete composition or the wet industrial mortar composition is prepared by mixing each component of the binder composition and the aggregates in water.

[0202] According to this disclosure, the term "mixture" should be understood as any form of mixture.

[0203] In a preferred embodiment, a portion of the binder composition and at least a portion of the water are mixed together before mixing with the aggregates.

[0204] In a preferred embodiment in which the hydraulic admixture composition (ABCD) according to the invention, in particular when this is a fluid formulation of concrete or mortar, the ratio C) / (A) less than 0.5 and possibly within the following ranges in increasing order of preference: 0.1 < (C) / (A) < 0.45; 0.2 < (C) / (A) < 0.42; 0.25 < (C) / (A) < 0.40, for example 0.25 < (C) / (A) < 0.40.

[0205] This manufacturing process is a simple and inexpensive method for preparing the adjuvanted hydraulic composition according to the invention, comprising the mixture ABCD(E) and water (C) in an amount such that the ratio C) / (A) is as defined above; a part of the binder and at least a part of the water being preferably mixed together before mixing with the aggregate.

[0206] The present invention also includes:

[0207] A method for producing ready-mix concrete or concrete for prefabrication, with the hydraulic composition modified according to the invention

[0208] A method for producing screeds, repair mortars, floor coverings, tile adhesives, joints, or technical mortars, with the hydraulic composition modified according to the invention

[0209] These production processes are simple and economical processes which are integrated into building construction processes or civil engineering works or elements thereof, coatings, sealants, screeds, tile adhesives and / or interior or exterior insulation systems, from the wet formulation according to the invention as defined herein, which hardens in particular by being exposed to air.

[0210] They are characterized in that the wet formulation ABCD(E) according to the invention as defined herein is shaped or applied to a support and is then subjected to a curing step at a temperature between (in increasing order of preference), -5 and 95°C; 20 and 65°C, 25 and 50°C, for 1 to 48 h, preferably for 5 to 36 h.

[0211] It is also possible that the curing step includes cycles of increasing and decreasing temperatures, at a relative humidity greater than or equal to 40%, preferably at 80% and, more preferably, equal to 100%, under a pressure between 8 and 12 Atm or a pressure of 1 Atm.

[0212] The present invention also includes:

[0213] hardened or partially hardened products resulting from the admixtured hydraulic composition according to the invention

[0214] the hardened concrete composition or the hardened industrial mortar composition obtained from the wet concrete composition or the wet industrial mortar composition described above.

[0215] the use of the adjuvant composition (B) according to the invention, to reduce the viscosity of hydraulic compositions based on low-carbon hydraulic mineral binders

[0216] The invention also relates to the use of the binder composition described above to improve (decrease) the fresh rheology, for example the fresh yield strength and the fresh viscosity, of a wet concrete composition or a wet industrial mortar composition, in particular a tile adhesive, a coating, a bonding mortar, a repair mortar, a plaster, a technical mortar and a floor covering mortar.

[0217] The invention also relates to the use of the binder composition described above for the preparation of prefabricated concrete or ready-mix concrete.

[0218] The expressions "from ... to ...", "between ... and ...", "ranging from ... to ...", "varies from ... to ...", and "less than ..." should be understood inclusive of limits, unless otherwise specified. EXAMPLES

[0219] Example 1

[0220] Evaluation of the performance of the adjuvant composition on a low-carbon hydraulic composition, with a specific ternary binder:

[0221] [Tables 1] Component Hydraulic Composition 0 / 4 mm crushed (kg / m3) 970 4 / 10 mm crushed (kg / m3) 399 10 / 20 mm crushed (kg / m3) 636 Binder (kg / m3) 360 Effective Water (kg / m3) 130 Combination of Admixtures (kg / m3) 3.8 (0.280 polymer B1.1, 0.093 polymer B1.2, 0.117 polymer B1.3, 0.459 polymer B2, 0.120 Qa nitrate, 0.009 antifoam, 0.003 biocide, 2.719 water) Effective Water / Binder Ratio 0.36

[0222] The detailed composition of the binder is as follows:

[0223] [Tables2] Phaser!: Proportions^ Cünksm 19.5» Sulfate below tdüms 2s nuLé'mouiu® 29.5 s Calctes 49s

[0224] The combination of adjuvants used has the following composition (the contents are expressed by mass relative to the total dry mass of the active compounds in the combination of adjuvants): - 25.9% of polymer B 1.1: with a = 65, b = 35 and z = 53, -8.6% of polymer B 1.2: with a = 49, b = 45, c = 6 and z = 17, - 10.8% of polymer B 1.3: with a = 82.3, b = 17.7 and z = 53, - 42.5% of polymer B2: HO OH ■.....P “O R HO OH with n=6, m=35, R = H or CH3 and the molar ratio PO / OE = 10 / 31, - 11.1% calcium nitrate, - 0.8% antifoams, of which 50% are alkyldimethylamine type and 50% are ethoxylated fatty alcohols, and - 0.3% biocide, (ethylendioxy) dimethanol type.

[0225] Various rheological agents are added to the hydraulic composition of Table 1 and inverted cone measurements were carried out according to standard NF PI8-462 (2023) with filling in one go, without application of blows distributed on the surface of concrete.

[0226] The slump measurement was carried out according to standard NF EN 12350-2 (2019). The compressive strength measurement was carried out according to standard NF EN 12390-3 (2019) on 15x15x15cm3 cubic specimens after 24h wet curing (RH = 100%) in a mold in a room maintained at 20°C.

[0227] Determination of the dosage of rheological agent: Protocol P.

[0228] To determine the dosage of rheological agent required for the low carbon type hydraulic composition defined in Table 1, spread tests on the paste scale of the adjuvanted hydraulic composition were carried out.

[0229] The results of the spreading tests according to protocol A defined in the description are summarized in the following table (the dosages indicated in rheological agent correspond to the dosages of active material relative to the total mass of ternary binder): [Tables 3] Rheological agent used NT spreading Rheological agent dosage (%sec > BUlemeA. imm) High molar mass polycarboxylate Sc- 0.000% 41G 100% St 0.022% 3.00 73% Sa 0.028% 0.270 ss% Ss 0.032% 255 82% Si 0.074% 235 57% Ss 0.134% 225 55% Cellulose gum 0.0000% 410 100% Si 0.000580 380 93% Sa G.0023% 350 85% Ss 0.034¾ 290 71% St 0.0054% 290 71% Ss 0.0000% 410 100% St 0.0025% 410 100% Sa 0.0050% 395 98% Ss G0100¾ 375 91% Si 0.0200¾ 345 84%

[0230] It has been observed that the use of a high molecular weight polycarboxylate results in a reduction in spreadability, which is dependent on the dosage of the rheological agent. A dosage of 0.032% of a high molecular weight polycarboxylate thus reduces the spreadability of the paste in the adjuvanted hydraulic composition by 38%. Similarly, the use of diutan gum or methyl hydroxyethylcellulose results in a reduction in spreadability, which is dependent on their dosage.

[0231] The dosages indicated in rheological agent correspond to the dosages relative to the total mass of ternary binder ACT.

[0232] The results are summarized in the following table:

[0233] [Tables4] QWQsà tests Test D ESSat E Test F PuiycafbsxylHte high mass - 032¾ (0.1152 faÿhf) - - - - Gemme < : - 0.05% (33018 kgorn} 0.0010% (0 6036 0.0820% (0.0072 - WW cellulose - - - - — 0.010% (0.036 fegW) 5 min slump (mm) 225 230 235 235 230 220 30 mm slump 230 230 230 230 230 220 5 min slump (m) 210 220 210 210 210 215 90 mm slump 205 220 i 95 195 185 175 Slump 120 min (mm) 200 215 180 155 155 160 Inverted cone spacing 5 min (s) 115 53 9.7 6.5 9.6 8.1 Inverted cone flow 3 min (s) 103 53 105 6.9 9.3 73 Inverted cone spacing 5 min (s) 143 5.5 8.9 7.3 9.8 83 Inverted cone flow 90 min (s) 10.6 4.9 6.1 9.0 7.8 Inverted cone flow 120 min (s) 7 7 9.1 6.4 9.2 6 7 Compressive strength 24ff ■(MPaj 63 6.5 6.6 63 6.7 7.1 : comparison

[0234] Test G: same hydraulic composition as in Table 1 without polymers A to D + 0.032% (dry mass) of high-mass polycarboxylate. Results: Slump at 5 min: 40 mm, Inverted cone flow at 5 min: not measurable.

[0235] It is observed that the use of a high molar mass polycarboxylate (Test B) reduces the flow time in the inverted cone by half compared to the reference concrete (Test A). The addition of Diutan gum or Methyl- Hydroxyethylcellulose also allows this reduction in flow time at the inverted cone.

[0236] This result is surprising since the rheological agent alone drastically increases the viscosity of the hydraulic composition, making the flow of concrete through the cone impossible (test G). The rheological agent and the superplasticizers therefore act synergistically to improve the viscosity of the hydraulic composition over two hours of workability.

[0237] The addition of rheological agents has no impact on the compressive strengths measured at 24h and 20°C.

[0238] Example 2:

[0239] Evaluation of the performance of the adjuvant composition on two low-carbon hydraulic compositions, with a specific ternary binder, with the difference between the two compositions being the W / C ratio and the content of the specific ternary binder:

[0240] [Tables5] lllli^ composai 0 / 1 mm rolled (kg / nf) 215 250 0 / 4 mm crushed (kg W*) 840 885 4 / 22.4 mm crushed (kg / m3) 905 950 Binder (kg / m3) 03 CTi .O. 280 Effective Water (kg / ms) 148 126 2.975 4.118 (0.230 of polymer Bt.t (0.319 of polymer 811. 0.199 of polymer. 81 2, 0.295 of polymer: 0.276 of polymer 81 2, 0.408 of polymer Combination of adjuvants SI .3, 0.110 of -polymer 81 3, 0.152 of polymer 81.4, 81.4, 0.080 of C& nitrate 0.111 of nitrate of 0.008 of antifoam, 0.009 of antifoam, 0.003 of btadde. 0.004 of biocide, 2.051 of water) 2.838 of water) Effective Water / Binder Ratio 0.42 0.45

[0241] The details of the composition of the specific binder are presented in Table 2 a.

[0242] [Tableauxô] Proportion (%) Clinker 24.5 Calcium content 2 Granulated ground blast furnace slag 29.5 Calcium content 44

[0243] The combination of adjuvants used has the following composition (the contents are expressed by mass relative to the total dry mass of the active compounds in the combination of adjuvants): - 24.9% of polymer B 1.1: with a = 65, b = 35 and z = 53, -21.55% of polymer B 1.2: with a = 49, b = 45, c = 6 and z = 17, - 31.9% of polymer B 2: OH ;.....¥-0 R HQ OH with n=6, m=35, R = H or CH3 and the molar ratio PO / OE = 10 / 31, - 11.9% of polymer B 1.4: - with a = 43, b' = 16, b”= 41, z' = 53 and z” = 8. - 8.7% calcium nitrate, - 0.7% antifoams, of which 50% are alkyldimethylamine type and 50% are ethoxylated fatty alcohols, and - 0.35% biocide, (ethylendioxy) dimethanol type.

[0244] In the same way as for the previous example, a high molar mass polycarboxylate type rheological agent was added to the two hydraulic compositions in Table 5 and inverted cone measurements were carried out according to standard NF P18-462 (2023) with filling in one pass, without application of blows distributed on the concrete surface.

[0245] The slump measurement was carried out according to standard NF EN 12350-2 (2019).

[0246] Determination of the dosage of rheological agent:

[0247] To determine the dosage of rheological agent required for the two low-carbon hydraulic compositions (No. 2 and No. 3) defined in Table 5, spread tests on the paste scale of the adjuvanted hydraulic composition were carried out.

[0248] The results of the spreading tests according to protocol A defined in the description are summarized in the following table (the dosages indicated in rheological agent correspond to the dosages of active material relative to the total mass of ternary binder):

[0249] [Tables7] Hydraulic spreading compound Bosaqe in rheological agent (%$ee) Spread (mm) Sj / Ss Hydraulic composition no. 2 Sa 0.000% 390 100% S, 0.022% 280 72% s2 0.031% 230 62% s3 0.068% 230 59% Hydraulic composition no. 3 Sa 0.0000% 420 100% Si 0.022% 310 74% S-.- 0.054% 280 67% s3 0.068% 275 66%

[0250] In the case of hydraulic composition No. 2, a dosage of 0.031% rheological agent reduces the spread of the paste of hydraulic composition No. 2 by 38%. Conversely, a higher dosage of rheological agent (0.054%) is required to achieve a 33% reduction in the spread of the paste of hydraulic composition No. 3.

[0251] The dosages indicated in rheological agent correspond to the dosages relative to the total mass of ternary binder.

[0252] The results are summarized in the following table

[0253] [Tables8] |||||||^^^^^ Test H* Test l Test K Hydraulic composition N'2 NC N;i3 N'3 High bulk polycarboxylate 0% 0.031% (0.1 w Wtrf) 0% 0.054% (0.15-2 kg(rn-) 5 min slump (mm) 250 240 2.50 220 EœiE&merd inverted cone 5 min (s) Not measurable Total segregation 1.2 Not measurable Total segregation 3.0 * : comparison

Claims

Demands

1. Hydraulic composition with admixture comprising: (A) a hydraulic binder composition comprising: (A1) between 1% and 55% by mass on a dry basis, of at least one source of clinker, lime, or a mixture thereof; (A2) and at least one mineral addition; (B) an admixture composition comprising; relative to the total dry mass of active ingredients in the adjuvant composition: (.B1) 35% to 60% by mass of at least one water-reducing or high-reducing adjuvant selected from polyalkoxylated polycarboxylates, (.B1) 25% to 45% by mass of at least one water-reducing or high-reducing adjuvant selected from polyalkoxylated phosphonates, (.B3) 0.01% to 15% by mass of at least one rheological agent, (.B4) 0.1% to 15% by mass of a calcium salt, provided that (.B4) is different from (.A2), (.B5) 0.1% to 3% by mass of at least one antifoaming agent and / or at least one air-entraining agent, and (.B.6.(C) 0.05% to 1% by mass of biocidal agent(s); (D) water; (C) at least one granule.

2. An adjuvanted hydraulic composition according to claim 1, wherein the hydraulic binder composition (A) comprises in addition to (.A1) & (.A.2.), at least one of the following components: (.A.3.) at least one filler in a concentration of at least 15% by mass on a dry basis relative to the hydraulic binder composition, (.A.4.) and at least one activator comprising a sulfate source and / or a sulfite ion source and / or at least one activator other than those consisting of a sulfate source of sulfate ions and / or sulfite ions, in a concentration preferably of not more than 10%, and, more preferably still of not more than 5%, by mass on a dry basis relative to the hydraulic binder composition, with the condition that (.A.4.) is different from (.A.2.) and (.B.4).

3. Hydraulic composition with additives according to claim 1 or 2 characterized in that it comprises additives (E) qualitatively and / or quantitatively different from those of the composition (B) of additives.

4. Hydraulic composition with admixture according to at least one of the preceding claims, which is a fluid preparation of concrete or mortar in which: the ratio (C) / (A) in concrete or mortar is less than 0.5 and possibly within the following ranges in ascending order of preference: 0.1 < (C) / (A) < 0.45; 0.2 < (C) / (A) < 0.42; 0.25 < (C) / (A) < 0.

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5. Hydraulic composition with admixture according to at least one of the preceding claims characterized in that it is a concrete composition.

6. Hydraulic composition with admixture according to at least one of claims 1 to 4 characterized in that it is a mortar composition.

7. Premix for the preparation of the hydraulic composition with additive according to at least one of claims 1 to 6 comprising: -Pmi- an additive composition (B) comprising; relative to the total dry mass of active ingredients in the adjuvant composition: (B1) 35% to 60% by mass of at least one water-reducing or high-strength water-reducing adjuvant selected from polyalkyl polycarboxylates, (B2) 25% to 45% by mass of at least one water-reducing or high-strength water-reducing adjuvant selected from polyalkyl phosphonates, (B3) 0.01% to 15% by mass of at least one rheological agent, (B4) 0.1% to 15% by mass of a calcium salt, (B5) 0.1% to 3% by mass of at least one antifoaming agent and / or at least one air-entraining agent, and (B6) 0.05% to 1% by mass of biocidal agent(s); -Pm2- and at least one of the following ingredients: (.Al) lime, at least one source of clinker or a mixture thereof; (.A.2.) at least one mineral addition,. (.A.3.) at least one filler in a concentration of at least 15% by mass on a dry basis relative to the hydraulic binder composition, (.A.4.) and at least one activator comprising a sulfate source and / or a sulfite ion source and / or at least one activator different from those consisting of a sulfate source of sulfate ions and / or sulfite ions, in a concentration preferably of no more than 10%, and, more preferably still of no more than 5%, by mass on a dry basis relative to the hydraulic binder composition, with the condition that (.A.4.) is different from (.A.2.) and (.B.4); (.E.) at least one additive (E) qualitatively and / or quantitatively different from (.A.2.), (.A.4.) and those of the composition (B) of admixtures, (C) water; (D) at least one aggregate.

8. Kit comprising at least some of the components of the hydraulic composition with admixture according to at least one of claims 1 to 4 and / or the premix according to claim 6, together with instructions for the preparation of the hydraulic composition with admixture according to at least one of claims 1 to 4, preferably, when this hydraulic composition with admixture is a concrete preparation, with a ratio C) / (A) less than 0.5 and possibly within the following ranges in ascending order of preference: 0.1 < (C) / (A) < 0.45; 0.2 < (C) / (A) < 0.42; 0.25 < (C) / (A) < 0.

40.

9. A method for manufacturing the hydraulic composition (A) with adjuvant according to at least one of claims 1 to 4, consisting essentially of mixing (A) (B) (C) & (D) or even at least one other component, and / or the premix according to claim 7 with (A) (B) (C) and / or (D), or even at least one other component, possibly at least one additive (E) qualitatively and / or quantitatively different from those of the composition (B) of adjuvants.

10. Method according to claim 9 characterized in that it comprises a prior protocol P for determining the required dosage of rheological agent (.B.3.) in the adjuvanted hydraulic composition (A).

11. A method for producing ready-mix concrete or concrete for prefabrication, with the hydraulic composition admixed according to at least one of claims 1 to 4, and / or with the premix according to claim 7.

12. A method for producing screeds, repair mortars, floor coverings, tile adhesives, joints, or technical mortars, with the hydraulic composition admixed according to at least one of claims 1 to 4 and / or with the premix according to claim 7.

13. Hardened or curing products derived from the hydraulic composition supplemented according to at least one of claims 1 to 4, these hardened products comprising and / or being obtained from: -Pdl- a hydraulic binder composition (A) comprising: (A1) lime, at least one source of clinker or a mixture thereof; (A2) at least one mineral addition, and, optionally, at least one of the following components: (A3) at least one filler in a concentration of at least 15% by mass on a dry basis relative to the hydraulic binder composition, (A4)) and at least one activator comprising a sulfate source and / or a sulfite ion source and / or at least one activator other than those consisting of a sulfate source of sulfate ions and / or sulfite ions, in a concentration preferably of no more than 10%, and, more preferably still, of no more than 5%, by mass on a dry basis relative to the hydraulic binder composition, with the condition that (.A.4.) is different from (.A.2.) and (.B.4); -Pd2- an admixture composition (B) comprising; in relation to the total dry mass of active materials of the adjuvant composition: (.B1) from 35% to 60% by dry mass of at least one water-reducing or high water-reducing adjuvant chosen from polyalkoxylated polycarboxylates, (.B.2.) from 25% to 45% by dry mass of at least one water-reducing or high water-reducing adjuvant chosen from polyalkoxylated phosphonates, (.B.3.) from 0.01% to 15% by dry mass of at least one rheological agent, (.B.4.) from 0.1% to 15% by mass on a dry basis of a calcium salt, (.B.5.) from 0.1% to 3% by mass on a dry basis of at least one antifoaming agent and / or at least one air-entraining agent, and (.B.6.) from 0.05% to 1% by mass on a dry basis of biocidal agent(s); -Pd3- and possibly at least one of the following ingredients:.

14. (.E.) at least one additive (E) qualitatively and / or quantitatively different from (.A.2.), from (.A.4.) and from those of the composition (B) of adjuvants, (C) of water; (D) at least one aggregate. Use of the adjuvant composition (B) according to at least one of claims 1 to 4, and / or the premix according to claim 7, to reduce the viscosity of hydraulic compositions based on low carbon hydraulic mineral binders.