Hydraulic binder composition containing steelmaking slag, binder and alkali mineral salt

Abstract

The present invention relates to a hydraulic binder composition comprising: A) the following mixture: A-1) at least one steelmaking slag between 20% and 95% by dry mass, A-2) at least one slag different from A-1 between 4% and 79% by dry mass, and / or at least one pozzolanic material and / or at least one inert filler, A-3) at least one binder between 1% and 25% by dry mass, preferably a clinker source and / or a lime source different from A-1 and A-2, B) at least one steelmaking slag accelerator between 0.01% and 10% by dry mass based on the total dry mass of A, C) at least one alkali activator for reacting A-1, A-2 and / or A-3 with water between 0.1% and 5% by dry mass based on the total dry mass of A, which is selected from alkali mineral salts and mixtures thereof and is different from B, D) at least one fluidizing agent between 0.1% and 2% by dry mass based on the total dry mass of A.

Description

Technical Field

[0001] The present disclosure relates to the field of binder compositions for preparing concrete or industrial mortar. More specifically, the technical field of the present invention relates to hydraulic mineral binders containing at least one steelmaking slag used in compositions capable of setting and hardening, such as mortar or concrete compositions.

[0002] More specifically, the present invention relates to hydraulic binder compositions for the construction industry and to compositions capable of setting and hardening, which comprise at least one steelmaking slag, at least one other slag different from the steelmaking slag, and a cobinder.

[0003] The present invention also relates to a method for preparing these slag-based binders of these compositions capable of setting and hardening.

[0004] Architectural uses made from the set and hardened products obtained from these compositions are also within the field of the present invention.

Background Art

[0005] The production of Portland cement emits a large amount of carbon dioxide, thus having a strong adverse impact on the environment. Cement production essentially generates CO during the firing of raw materials in a kiln at a very high temperature (1450 ° C) through the decarbonation reaction of limestone (Equation (1)). 2 is generated. CaCO 3 (solid) → CaO (solid) + CO 2 (gas) (Equation (1))

[0006] Furthermore, carbon dioxide is emitted as a result of the combustion of fossil fuels required to heat the cement kiln. By adding the additional emissions from the grinding process, approximately 1 ton of CO 2 is obtained per ton of Portland cement. Overall, the cement industry is responsible for approximately 7 to 9% of the world's carbon dioxide emissions.

[0007] Furthermore, handling Portland cement can lead to health problems (such as allergies), especially due to its high alkalinity (pH above 13). Additionally, dangerous elements such as hexavalent chromium (Cr(VI)) may be released during mixing, which is also harmful to workers upon skin contact. Cr(VI) reducing agents (such as ferrous sulfate) are usually contained in cement powder, but their efficiency has a time limit. Construction workers, especially those in the third world, often cannot be expected to check the deadlines associated with such treatments.

[0008] The latest research on new binders aims to replace cement for various applications with binders that have less environmental impact. One route is through the use of resources such as by-products from other industries (which are waste in one industry but major resources in another) without costly treatment. This is the case of blast furnace slag, a by-product of the iron industry. By grinding this product into fine powder (GGBS), a cementitious material that can be used to partially replace cement or can be used alone by adding some chemical activators can be obtained.

[0009] This is also the case of converter slag such as steelmaking slag, for example basic oxygen furnace slag (BOF). BOF slag is generated during the steelmaking process when iron ore is oxidized by oxygen in a converter to reduce the carbon content of the iron ore. However, the use of converter slag as a cement alternative is limited due to its relatively high free lime (CaO) content. Free lime can react with water and form calcium hydroxide that crystallizes in cementitious building materials when hardening. This process significantly increases the crystallization pressure in the hardened material and then causes significant volume expansion or swelling. Nevertheless, several attempts have been made to utilize converter slag in cementitious building materials.

[0010] For example, WO2020 / 188070 (Tata Steel) discloses a steel slag mixture containing a polycarboxylic acid that acts as both an activator and a superplasticizer, and a chelating agent selected most preferably from citrate salts.

[0011] JP2000169212 (Nippon Kokan) teaches that a chelating agent selected from triethanolamine, triisopropanolamine, or phenol can act as an activator for steel slag.

[0012] WO2021 / 197866 (Sika Technology AG) discloses a method for controlling the volume expansion of a hydraulic setting composition containing steel slag, the method including the step of adding a silica source to the composition.

Prior Art Documents

Patent Documents

[0013]

Patent Document 1

Patent Document 2

Patent Document 3

Summary of the Invention

[0014] However, the compressive strength of the hardened product obtained from a prior art composition containing steel slag over a long period, usually on the 28th day, can be greatly improved.

[0015] In this specification, the present invention aims to address at least one of the above problems and / or requirements through the fulfillment of at least one of the following objectives. -O1- To provide a binder based on steelmaking slag or a mortar or concrete composition containing the binder based on steelmaking slag, which is an attractive alternative to a composition mainly containing ordinary Portland cement (OPC). -O2- To provide an environmentally friendly binder based on steelmaking slag or a mortar or concrete composition containing the binder based on steelmaking slag. -O3- To provide a binder based on steelmaking slag or a mortar or concrete composition containing the binder based on steelmaking slag, which is more acceptable than an OPC-based composition from the viewpoint of health and safety issues. -O4- To provide a binder based on steelmaking slag or a mortar or concrete composition containing the binder based on steelmaking slag, which results in dry mortar, dry precast concrete, semi-dry precast concrete, wet mortar, and concrete mixes having performance suitable for production by a plurality of methods such as vibration filling, spraying, trowelling, casting, etc. -O5- To provide a binder based on steelmaking slag or a mortar or concrete composition containing the binder based on steelmaking slag, which results in a hydrous mix having appropriate flow characteristics, i.e., a stable rheology (good workability), during the normal setting time (e.g., from several minutes to several hours) required by users of the hydrous mix. -O6- To provide a binder based on steelmaking slag or a mortar or concrete composition containing the binder based on steelmaking slag, which results in a hardened material having the required mechanical properties, particularly an acceptable early strength (e.g., 24 hours). -O7- To provide a binder based on steelmaking slag or a mortar or concrete composition containing the binder based on steelmaking slag, which results in a hardened material having the required durability. -O8- To provide a mortar or concrete composition containing a steelmaking slag-based binder or the steelmaking-based binder, which results in a material that cures in a normally required setting time (e.g., from several minutes to several hours). -O9- To provide a simple and inexpensive preparation method for a mortar or concrete composition containing a steelmaking slag-based binder or the steelmaking slag-based binder, which is compatible with at least one of the objectives -O1- to -O9-. -O10- To provide a simple and inexpensive preparation method for a steelmaking slag-based binder or a mortar or concrete composition containing the steelmaking slag-based binder in a state containing moisture. -O11- To provide a cured product for the construction industry containing steelmaking slag as at least a partial binder.

Means for Solving the Problems

[0016] Surprisingly, a hydraulic binder composition containing at least one kind of steelmaking slag and at least one other slag different from the steelmaking slag can have an acceptable early strength on the first day and, in the long term, usually an acceptable mechanical strength on the 28th day when it contains at least one binder selected from a clinker source and a lime source, and at least one alkali activator selected from alkali mineral salts, and the alkali activator for the reaction of at least one of the steelmaking slag, another slag different from the steelmaking slag, or the binder with water.

[0017] The above object is achieved by A) The following mixture: A-1) At least one kind of steelmaking slag between 20% and 95% by dry mass. A-2) At least one slag different from A-1 between 4% and 79% by dry mass, and / or at least one pozzolanic material and / or at least one inert filler. A - 3) At least one binder between 1% and 25% by dry mass, preferably a clinker source and / or a lime source different from A - 1 and A - 2, B) At least one steel slag accelerator between 0.01% and 10% by dry mass based on the total dry mass of A, C) At least one alkali activator for reacting A - 1, A - 2 and / or A - 3 with water, between 0.1% and 5% by dry mass based on the total dry mass of A, different from B and selected from alkali mineral salts and their mixtures, D) At least one fluidizing agent between 0.1% and 2% by dry mass based on the total dry mass of A which is achieved by a hydraulic binder composition containing the same.

[0018] The present invention also relates to dry concrete compositions or industrial dry mortar compositions, specifically tile adhesives, coatings, assembly mortars, repair mortars, renders, technical mortars and floor covering mortars containing at least one aggregate and the above - mentioned hydraulic binder composition.

[0019] The present invention further relates to wet concrete compositions or industrial wet mortar compositions, specifically tile adhesives, coatings, assembly mortars, repair mortars, renders, technical mortars and floor covering mortars containing at least one aggregate, the above - mentioned hydraulic binder composition, and water.

[0020] The present invention further relates to hardened concrete compositions or hardened industrial mortar compositions obtained from the above - mentioned wet concrete compositions or industrial wet mortar compositions.

[0021] Furthermore, the present invention relates to a method for preparing the above-described wet concrete composition or industrial wet mortar composition, which includes a step of mixing water with at least one kind of aggregate and the above-described hydraulic binder composition, wherein the hydraulic binder composition is prepared in situ, separately and / or in a premixed form, from at least a plurality of different components of the binder composition, before or during the mixing step.

Embodiments for Carrying Out the Invention

[0022] Definitions According to the terminology used in this specification, the following non-limiting definitions should be taken into consideration.

[0023] "Alkali activator" is a chemical compound containing any of sodium, potassium or lithium cations, which raises the pH value of an aqueous solution above its neutral state. The test for determining whether an alkali compound is an alkali activator according to the present invention is that the concentration of the alkali compound at a temperature of 20 °C when the pH rises to a value of at least 7.5 after the alkali compound is completely dissolved is 1 mol.L -1 This may be a step of adding the alkali compound to deionized water so as to achieve this.

[0024] "Slag" represents a stony by-product component separated from a metal during the refining or purification of an ore.

[0025] "Steel slag" in this specification is a by-product from the steelmaking process. In this specification, iron slag, especially furnace slag, is also interpreted as steel slag. Examples of "steel slag" include the term "BOFS" including basic oxygen furnace slag and, by extension, electric arc furnace slag (EAFS) or ladle slag (LS) and mixtures thereof.

[0026] "GGBS" or "GGBFS": Ground granulated blast-furnace slag, which is synonymous with blast-furnace slag, blast-furnace slag powder (GBFS), granulated blast-furnace slag powder and blast-furnace slag fine aggregate.

[0027] "Cement" is understood to mean a powdery substance used in making mortar or concrete. It is a mineral binder and may contain no organic compounds. It refers to any ordinary cement, including cement based on Portland slag blended and activated with alkali.

[0028] "Binder" refers to a "hydraulic binder" meaning any material that hardens by simply adding water, such as GGBS and cement. More specifically, "binder" should mean a mineral composition that forms a whole with mechanical properties such as compressive strength and flexural strength after solid particles of sand and / or aggregate are mixed with water and paste and then hardened, and the binder may include a combination of hydraulic materials such as Portland cement, slag, fly ash, pozzolan, etc. and non-hydraulic materials such as gypsum, hydrated lime, magnesia, etc.

[0029] "Mortar" is a material composed of a binder, aggregate such as sand, and other components, and refers to something like a mixture.

[0030] "Concrete" is a material composed of a binder, aggregate such as sand and gravel, and other components, and refers to something like a mixture.

[0031] Detailed description The hydraulic binder composition according to the present invention is A) The following mixture: A-1) At least one steelmaking slag between 20% and 95% by dry mass, A-2) At least one slag different from A-1 between 4% and 79% by dry mass, and / or at least one pozzolanic material and / or at least one inert filler, A-3) At least one binder between 1% and 25% by dry mass, preferably a clinker source and / or a lime source different from A-1 and A-2, B) At least one steelmaking slag accelerator between 0.01% by dry mass and 10% by dry mass based on the total dry mass of A, C) At least one alkali activator for reacting A-1, A-2 and / or A-3 with water, between 0.1% by dry mass and 5% by dry mass based on the total dry mass of A, which is different from B and is selected from alkali mineral salts and mixtures thereof, C, D) At least one fluidizing agent between 0.1% by dry mass and 2% by dry mass based on the total dry mass of A and contains.

[0032] Component A Component A is A-1) Steelmaking slag between 20% by dry mass and 95% by dry mass, A-2) At least slag different from A-1 between 4% by dry mass and 79% by dry mass, and / or at least one pozzolanic material and / or at least one inert filler, and A-3) At least one binder between 1% by dry mass and 25% by dry mass, preferably a clinker source and / or a lime source different from A-1 and A-2 is a mixture of.

[0033] Component A represents part of the binder of the hydraulic binder composition according to the invention. In other words, component A is a component of the hydraulic binder composition according to the invention that can react with water to coagulate and harden.

[0034] Component A1 Steelmaking slag is obtained, for example, in a Thomas process, a Linz-Donawitz process, a Siemens-Martin process, or an electric arc furnace when converting iron to steel. Steelmaking slag is produced when high-temperature iron ore is treated with oxygen to remove carbon and other elements that have a higher affinity for oxygen than iron. Usually, elements that fix impurities such as flux and / or limestone or dolomite are added during the process. The flux and the fixing aid combine with silicates and oxides to form a liquid slag. Then, the liquid slag is separated from the crude steel and cooled in a pit or a grand bay to form a crystalline or partially crystalline steelmaking slag. Thereafter, the cooled slag may be crushed, pulverized, and sieved to the desired fineness. Preferably, the steelmaking slag of the present invention is a type of slag that has not been additionally treated in a high-temperature state or during the cooling process.

[0035] The particle size of the steelmaking slag may be analyzed, for example, by sieve analysis as described in the standard ASTM C136 / C136M. The above process separates relatively coarse particles from fine particles by passing the material through many sieves having different mesh sizes. The material to be analyzed is shaken through a series of sieves that gradually become finer, using horizontal movement, vertical movement, or a combination of rotational movement alone. As a result, the percentage of particles remaining on a sieve of a given size is given.

[0036] Another indicator of the fineness of the steelmaking slag is the Blaine surface area. The Blaine surface area can be measured according to NF EN 196-6. According to a preferred embodiment, the Blaine surface area of the steelmaking slag is from 1000 to 8000 cm 2 / g, preferably from 2000 to 6000 cm 2 / g, more preferably from 3000 to 5000 cm 2It is between / g. This is because the accelerator can accelerate the reaction of the steelmaking slag with water to such an extent that relatively coarse slag can also be used. Relatively coarse slag may have the advantages of relatively high usefulness and relatively low cost compared to fine slag. However, it is also possible to use steelmaking slag with a high specific surface area.

[0037] Preferably, in the hydraulic binder composition according to the present invention, the steelmaking slag is selected from the group consisting of basic oxygen furnace slag (BOF), Linz-Donawitz (LD) slag, electric arc furnace (EAF) slag, and mixtures thereof.

[0038] A very preferred type of steelmaking slag in this specification is basic oxygen furnace slag (BOF). According to an embodiment, the steelmaking slag is basic oxygen furnace slag. Another common name for basic oxygen furnace slag is basic oxygen slag (BOS). The chemical composition of BOF slag can be measured by XRF as described in ASTM D 5381-93. The chemical composition of normal BOF slag is 27 to 60% by mass of CaO, 8 to 38% by mass of iron oxide, 7 to 25% by mass of SiO 2 、1 to 15% by mass of MgO, 1 to 8% by mass of Al 2 O 3 、0.5 to 8% by mass of MnO, 0.05 to 5% by mass of P 2 O 5 、and some trace components, especially oxides of <1% by mass of Ti, Na, K, and Cr. The chemical composition of BOF slag may vary depending on the steelworks and the operating parameters of the basic oxygen furnace. In particular, a preferred chemical composition of BOF slag is 35 to 55% by mass of CaO, 10 to 30% by mass of iron oxide, 10 to 20% by mass of SiO 2 、2 to 10% by mass of MgO, 1 to 5% by mass of Al 2 O 3 、0.5 to 5% by mass of MnO, 0.5 to 3% by mass of P 2 O 5 、and some trace components, especially oxides of <1% by mass of Ti, Na, K, and Cr.

[0039] Preferred steelmaking slags, especially basic oxygen furnace slags, each have, in each case, an iron oxide content expressed as Fe 2 O 3 of 8 to 38% by mass, preferably 10 to 30% by mass, and a sulfur content expressed as SO 3 of <1% by mass, preferably <0.5% by mass, particularly <0.1% by mass.

[0040] Particularly preferred is that the steelmaking slag does not contain dicalcium silicate (C 2 S, belite) in an amount exceeding 66% by mass based on the total dry mass of the slag.

[0041] In certain embodiments, the hydraulic binder composition of the present invention comprises from 25% to 80% by dry mass, preferably from 35% to 60% by dry mass, of steelmaking slag.

[0042] Component A-2 In certain embodiments, the hydraulic binder composition of the present invention comprises from 10% to 75% by dry mass, preferably from 35% to 60% by dry mass, of Component A-2.

[0043] According to the present invention, Component A-2 is composed of at least a slag different from A-1, and / or at least one pozzolanic material and / or at least one inert filler.

[0044] In an embodiment, the slag different from A-1 is ground granulated blast furnace slag (GGBS).

[0045] The proportion of the slag different from A-1 in Component A-2 is usually between 0% and 100% by dry mass, preferably between 10% and 80% by dry mass, more preferably between 20% and 70% by dry mass, based on the total dry mass of Component A-2.

[0046] In an embodiment, the pozzolanic material is selected from the group consisting of natural pozzolan, pumice, silica fume, precipitated silica, fly ash, calcined shale, metakaolin, calcined ilite, calcined bentonite, calcined montmorillonite, calcined smectite, biomass ash, rice husk ash, diatomaceous earth, crushed opal, carbonated steel slag, carbonated olivine, carbonated wollastonite, all carbonated silicate-containing minerals, crushed waste glass, and mixtures thereof.

[0047] The proportion of the pozzolanic material in Component A-2 is usually between 0% dry mass and 100% dry mass, preferably between 10% dry mass and 80% dry mass, and more preferably between 20% dry mass and 70% dry mass, based on the total dry mass of Component A-2.

[0048] In an embodiment, the inert filler is selected from the group consisting of calcite powder, aragonite powder, vaterite powder, dolomite powder, precipitated calcium carbonate, quartz powder, and mixtures thereof.

[0049] The proportion of the inert filler in Component A-2 is usually between 0% dry mass and 100% dry mass, preferably between 10% dry mass and 80% dry mass, and more preferably between 20% dry mass and 70% dry mass, based on the total mass of Component A-2.

[0050] Component A-3 In certain embodiments, the hydraulic binder composition of the present invention comprises from 2% to 20% dry mass, preferably from 5% to 15% dry mass, of Component A-3.

[0051] In a preferred embodiment, the clinker source is selected from the group consisting of ordinary Portland cement (OPC), Portland clinker, Portland clinker-containing cement, and cements defined in Standards EN 197-1 and NF EN 197-5, and mixtures thereof.

[0052] In one embodiment, the proportion of the clinker source is usually between 30% by dry mass and 100% by dry mass, preferably between 40% by dry mass and 80% by dry mass, and more preferably between 50% by dry mass and 70% by dry mass, based on the total dry mass of Component A-3.

[0053] In a preferred embodiment, the lime source is selected from the group consisting of quicklime, hydrated lime, natural hydraulic lime, and mixtures thereof.

[0054] In one embodiment, the proportion of the lime source is usually between 30% by dry mass and 100% by dry mass, preferably between 40% by dry mass and 80% by dry mass, and more preferably between 50% by dry mass and 70% by dry mass, based on the total mass of Component A-3.

[0055] Component B According to the present invention, the hydraulic binder composition comprises at least one steelmaking slag accelerator, i.e., an accelerator for the reaction between steelmaking slag and water.

[0056] When steelmaking slag reacts with water, a hydration reaction occurs and different mineral phases are formed. As a result, water and slag are consumed, hardening progresses, and strength increases. Therefore, a suitable method for measuring the reaction of steelmaking slag with water is the measurement of strength, particularly compressive strength. A relatively high compressive strength corresponds to a high degree of progress of the reaction, i.e., more mineral phases are formed. The acceleration of the reaction of steelmaking slag with water can be measured by comparing the strength, particularly compressive strength, of another mixture after a predetermined time of the reaction, for example, after 1 day, 7 days, and / or 28 days. An accelerator for the reaction of steelmaking slag with water can increase the strength, particularly compressive strength, of a mixture containing steelmaking slag, water, and the accelerator after a predetermined time, compared to the strength, particularly compressive strength, of a mixture of steelmaking slag and water measured after the same time without adding the accelerator at the same ratio. The above time is always measured from the time when water is added to the steelmaking slag. A suitable procedure for the measurement of compressive strength is described in EN 12190.

[0057] The accelerator for the reaction of steelmaking slag with water is selected from the group consisting of alkanolamines, reducing agents, saccharides, sugar acids, carboxylic acids and their salts, amino acids and their salts, sulfamic acid, glyoxal, acetylacetone, pyrocatechol, nitrilotri(methylphosphonic acid), etidronic acid, mineral salts, or mixtures thereof.

[0058] One kind of preferred accelerator is alkanolamine. Alkanolamines are preferably selected from the group including monoethanolamine, diethanolamine, triethanolamine (TEA), diethanolisopropanolamine (DEIPA), ethanol diisopropanolamine (EDIPA), isopropanolamine, diisopropanolamine, triisopropanolamine (TIPA), N-methyldiisopropanolamine (MDIPA), N-methyldiethanolamine (MDEA), tetrahydroxyethylethylenediamine (THEED), and tetrahydroxyisopropylethylenediamine (THIPD), and mixtures of two or more of these alkanolamines.

[0059] Preferred alkanolamines are triethanolamine (TEA), triisopropanolamine (TIPA), diethanolisopropanolamine (DEIPA), and ethanol diisopropanolamine (EDIPA). Particularly preferred alkanolamines are diethanolisopropanolamine (DEIPA), ethanol diisopropanolamine (EDIPA), and triisopropanolamine (TIPA).

[0060] Another suitable accelerator is a saccharide. The "saccharide" as meant in the present invention is a carbohydrate having an aldehyde group. In a particularly preferred embodiment, the saccharide belongs to the group of monosaccharides or disaccharides. Examples of saccharides include, but are not limited to, glyceraldehyde, threose, erythrose, xylose, lyxose, ribose, arabinose, allose, altrose, glucose, mannose, gulose, idose, galactose, talose, fructose, sorbose, lactose, maltose, sucrose, lactulose, trehalose, cellobiose, chitobiose, isomaltose, palatinose, mannobios, raffinose, and xylobiose. The saccharide can also be used in the state of dextrin, vinasse, or molasses. Both the D-form and L-form of the saccharide are equally preferred. Particularly preferred saccharides are fructose, mannose, maltose, glucose, galactose, dextrin, vinasse, and molasses.

[0061] Another suitable accelerator is a sugar acid or a salt thereof. The "sugar acid" as referred to in the present invention is a monosaccharide having a carboxyl group. It may belong to any of the groups of aldonic acid, uronic acid, uronic acid, or alduronic acid. Preferably, it is an aldonic acid. Examples of useful sugar acids related to the present invention include, but are not limited to, gluconic acid, ascorbic acid, neuraminic acid, glucuronic acid, galacturonic acid, iduronic acid, mucic acid, and saccharic acid. The sugar acid may exist in the form of a free acid or a salt. According to an embodiment, the salt of the sugar acid may be a salt containing a metal of Group Ia, IIa, Ib, IIb, IVb, or VIIIb of the periodic table of elements. Preferred salts of the sugar acid are salts of an alkali metal, an alkaline earth metal, iron, cobalt, copper, or zinc. Salts containing sodium, potassium, and calcium are particularly preferred. Both the D-form and L-form of the sugar acid are equally preferred. Particularly preferred sugar acid is gluconic acid and its salts, especially sodium gluconate.

[0062] Another suitable accelerator is an amino acid or a salt thereof. The amino acid is preferably selected from the group consisting of glycine, lysine, glutamate, glutamic acid, aspartic acid, polyaspartic acid, methionine, nitrilotriacetic acid (NTA), iminodiacetic acid, methylglycine-N,N-diacetic acid, and N,N-bis(carboxymethyl)glutamic acid, ethylenediaminedisuccinic acid (EDDS), ethylenediaminetetraacetic acid (EDTA), hexamethylenediaminetetraacetic acid (HEDTA), diethylenetriaminepentaacetic acid (DTPA) or a salt thereof. In particular, salts of alkali metals or alkaline earth metals are preferred. In particular, the salt is preferably selected from the group consisting of tetrasodium N,N-bis(carboxymethyl)glutamate, trisodium methylglycine-N,N-diacetic acid, tetrasodium iminodiacetate (IDS), trisodium ethylenediaminedisuccinate, tetrasodium ethylenediaminetetraacetate, and tetrasodium hexamethylenediaminetetraacetate.

[0063] Another suitable accelerator is a carboxylic acid or a salt thereof. The term "carboxylic acid" means any organic molecule having a carboxylic acid group or carboxylate group excluding the above-mentioned sugar acids or above-mentioned amino acids. Particularly preferred carboxylic acids are formic acid, glycolic acid, citric acid, lactic acid, malic acid, tartaric acid, oxalic acid, malonic acid, succinic acid, glutaric acid, adipic acid, and salicylic acid. The carboxylic acid may be in the form of the free acid or in the form of a salt. According to an embodiment, the salt of the carboxylic acid may be a salt containing a metal of Group Ia, IIa, Ib, IIb, IVb, or VIIIb of the periodic table. Preferred salts of the sugar acid are salts of alkali metals, alkaline earth metals, iron, cobalt, copper, or zinc. Salts containing sodium, potassium, and calcium are particularly preferred. Preferred salts of the carboxylic acid are calcium malonate, calcium succinate, calcium lactate, potassium citrate, and sodium citrate.

[0064] Another suitable accelerator is a reducing agent. As used herein, a reducing agent is a material having a reduction potential of less than 0.77 V as measured under standard conditions with respect to a standard reference hydrogen half-cell. That is, a suitable reducing agent is Fe3+ / Fe 2+ has a lower half-cell potential than. The reducing agent is preferably selected from the group consisting of thiosulfate, thiocyanate, and sulfite, preferably sodium thiosulfate or potassium sulfide. The reducing agent herein does not belong to any of the groups of alkanolamines, saccharides, sugar acids, carboxylic acids and their salts, or amino acids and their salts described above.

[0065] Other suitable accelerators are sulfamic acid, glyoxal, acetylacetone, pyrocatechol, nitrilotri(methylphosphonic acid), and etidronic acid.

[0066] In a preferred embodiment, the steel slag accelerator is selected from the group consisting of triethanolamine (TEA), triisopropanolamine (TIPA), diethanolisopropanolamine (DEIPA), ethanol diisopropanolamine (EDIPA), fructose, mannose, maltose, glucose, galactose, dextrin, vinasse, molasses, gluconic acid, ascorbic acid, neuraminic acid, glucuronic acid, galacturonic acid, iduronic acid, mucic acid, saccharic acid and their sodium, potassium or calcium salts, formic acid, glycolic acid, citric acid, lactic acid, malic acid, tartaric acid, oxalic acid, malonic acid, succinic acid, glutaric acid, adipic acid, salicylic acid and their sodium, potassium or calcium salts, glycine, glutamic acid, aspartic acid, polyaspartic acid, iminodisuccinic acid tetrasodium (IDS), diethylenetriaminepentaacetic acid (DTMA), nitrilotriacetic acid (NTA), sulfamic acid, glyoxal, acetylacetone, pyrocatechol, nitrilotri(methylphosphonic acid), etidronic acid, calcium nitrite, calcium nitrate, calcium chloride, magnesium chloride, calcium sulfate, aluminum sulfate, aluminum chloride, thiosulfate, especially sodium thiosulfate, thiocyanate, sulfite, and mixtures thereof, preferably triisopropanolamine (TIPA).

[0067] According to a particularly preferred embodiment, the accelerator is selected from the group consisting of diethanol isopropanolamine (DEIPA), ethanol diisopropanolamine (EDIPA), lactic acid, calcium lactate, oxalic acid, malonic acid, succinic acid, adipic acid, malic acid, tartaric acid, citric acid, sodium citrate, potassium citrate, gluconic acid, sodium gluconate, glycine, sulfamic acid, glyoxal, acetylacetone, pyrocatechol, tetrasodium iminodisuccinate (IDS), nitrilotriacetic acid (NTA), and calcium sulfate.

[0068] According to a further preferred embodiment, the accelerator is a mixture of two alkanolamines, or a mixture of an alkanolamine and at least one other accelerator different from the alkanolamine.

[0069] According to a particularly preferred embodiment, the accelerator is a mixture of diethanol isopropanolamine (DEIPA) and triisopropanolamine (TIPA).

[0070] According to a further embodiment, the accelerator is an alkanolamine selected from the group consisting of triethanolamine (TEA), triisopropanolamine (TIPA), diethanolisopropanolamine (DEIPA), ethanol diisopropanolamine (EDIPA), and / or methyldiethanolamine (MDEA), in particular TIPA and / or DEIPA, and fructose, mannose, maltose, glucose, galactose, dextrin, molasses, molasses, glucuronic acid, ascorbic acid, neuraminic acid, glucuronic acid, galacturonic acid, iduronic acid, mucic acid, saccharic acid and their sodium, potassium or calcium salts, formic acid, glycolic acid, citric acid, lactic acid, malic acid, tartaric acid, oxalic acid, malonic acid, succinic acid, glutaric acid, adipic acid, salicylic acid and their sodium, potassium or calcium salts, glycine, glutamic acid, aspartic acid, polyaspartic acid, iminodiacetic acid tetrasodium (IDS), diethylenetriaminepentaacetic acid (DTMA), nitrilotriacetic acid (NTA), sulfamic acid, glyoxal, acetylacetone, pyrocatechol, nitrilotri(methylphosphonic acid), etidronic acid, calcium nitrite, calcium nitrate, calcium chloride, magnesium chloride, calcium sulfate, aluminum sulfate, aluminum chloride, thiosulfate, in particular sodium thiosulfate, thiocyanate, and sulfite, and a mixture with another accelerator selected from the group consisting of potassium sulfide.

[0071] A preferred embodiment of the accelerator of the present invention is a mixture of TIPA and / or DEIPA and at least one of lactic acid, malic acid, tartaric acid, citric acid, sodium citrate, potassium citrate, malonic acid, succinic acid, adipic acid, glycine, sulfamic acid, or their salts, pyrocatechol, saccharides, in particular fructose, iminodiacetic acid tetrasodium (IDS), calcium chloride, and calcium sulfate.

[0072] A particularly preferred embodiment of the accelerator of the present invention is a mixture of TIPA and / or DEIPA and saccharides, preferably fructose.

[0073] A more preferred embodiment of the accelerator of the present invention is a mixture of TIPA and / or DEIPA with citric acid or its salts, particularly citric acid, sodium citrate, potassium citrate, or calcium citrate.

[0074] According to a further embodiment, the accelerator is an alkanolamine selected from the group consisting of triethanolamine (TEA), triisopropanolamine (TIPA), diethanolisopropanolamine (DEIPA), ethanol diisopropanolamine (EDIPA), and / or methyldiethanolamine (MDEA), particularly TIPA and / or DEIPA, and two other accelerators, wherein the first other accelerator is selected from the group of saccharides, particularly fructose, mannose, maltose, glucose, or galactose, and the second other accelerator is a mixture with two other accelerators selected from the group consisting of mineral salts and reducing agents, preferably calcium chloride, magnesium chloride, calcium nitrite, calcium nitrate, aluminum sulfate, aluminum chloride, calcium sulfate, sodium thiosulfate, and potassium sulfide.

[0075] A more preferred embodiment of the accelerator of the present invention is a mixture of TIPA and / or DEIPA with a saccharide, preferably fructose, and a carboxylic acid or its salt, preferably citric acid, sodium citrate, potassium citrate, or calcium citrate.

[0076] A more preferred embodiment of the accelerator of the present invention is a mixture of TIPA and / or DEIPA with a saccharide, preferably fructose, and aluminum sulfate or calcium nitrite.

[0077] A more preferred embodiment of the accelerator of the present invention is a mixture of TIPA and / or DEIPA with calcium sulfate or calcium nitrate.

[0078] According to a further embodiment, the accelerator is an alkanolamine selected from the group consisting of triethanolamine (TEA), triisopropanolamine (TIPA), diethanolisopropanolamine (DEIPA), ethanol diisopropanolamine (EDIPA), and / or methyldiethanolamine (MDEA), particularly TIPA and / or DEIPA, and two other accelerators, wherein the first other accelerator is selected from saccharides, particularly fructose, mannose, maltose, glucose, or galactose, and the second other accelerator is selected from saccharic acids, carboxylic acids, and sulfamic acid, particularly gluconic acid, ascorbic acid, neuraminic acid, glucuronic acid, galacturonic acid, iduronic acid, mucic acid, saccharic acid, salicylic acid, and their sodium, potassium, or calcium salts, formic acid, glycolic acid, citric acid, lactic acid, malic acid, tartaric acid, oxalic acid, malonic acid, succinic acid, glutaric acid, adipic acid, and their sodium, potassium, or calcium salts, and is a mixture with two other accelerators selected from the group consisting of these.

[0079] According to a further embodiment, the accelerator is an alkanolamine selected from the group consisting of triethanolamine (TEA), triisopropanolamine (TIPA), diethanolisopropanolamine (DEIPA), ethanol diisopropanolamine (EDIPA), and / or methyldiethanolamine (MDEA), in particular TIPA and / or DEIPA, and three other accelerators, wherein the first other accelerator is selected from saccharides, preferably fructose, mannose, maltose, glucose, or galactose, the second other accelerator is selected from saccharic acids, carboxylic acids, and sulfamic acid, preferably gluconic acid, ascorbic acid, neuraminic acid, glucuronic acid, galacturonic acid, iduronic acid, mucic acid, saccharic acid, and their sodium, potassium, or calcium salts, formic acid, glycolic acid, citric acid, lactic acid, malic acid, tartaric acid, oxalic acid, malonic acid, succinic acid, glutaric acid, adipic acid, salicylic acid, and their sodium, potassium, or calcium salts, and the third other accelerator is a mixture with three other accelerators selected from the group consisting of mineral salts and reducing agents, preferably calcium chloride, magnesium chloride, calcium nitrite, calcium nitrate, aluminum sulfate, aluminum chloride, calcium sulfate, sodium thiosulfate, and potassium sulfide.

[0080] According to an embodiment, the accelerator of the present invention is used in a pure and undiluted state.

[0081] According to another embodiment, the accelerator of the present invention is used as a mixture or as part of a mixture. The mixture includes or consists of an accelerator or a mixture of an accelerator and any additional raw material. The above additional raw material may be, for example, a solvent, in particular water, a biocide, or a pigment. The accelerator of the present invention may also be used in a dispersed or dissolved state, in particular dispersed or dissolved in water.

[0082] When the accelerator of the present invention is a mixture of two or more of the above accelerators, or when a blend is used, the accelerator or blend may be present as a one-component composition, a two-component composition, or a multi-component composition. This means that the separate constituents forming the accelerator or blend of the present invention may be present already mixed in one container, forming a one-component composition. The above accelerator may also be present in two or more spatially separated containers, forming a two-component composition or a multi-component composition. This may also be advantageous from the viewpoint of the shelf life of the accelerator mixture. This may facilitate mixing the accelerator with steelmaking slag and water in various ratios. When the accelerator of the present invention is present as a two-component composition or a multi-component composition, they can be premixed, added separately at the same time, or added separately at different times.

[0083] According to an embodiment, accelerator B is added in a total amount between 0.01% by dry mass and 10% by dry mass relative to the total dry mass of component A. The total amount refers to the total of the dry mass percentages of all accelerators present.

[0084] According to a preferred embodiment, the alkanolamine is added in a total amount between 0.005% by dry mass and 5% by dry mass, preferably between 0.01% by dry mass and 3% by mass relative to the total dry mass of component A.

[0085] According to a preferred embodiment, the saccharides are added in a total amount between 0.005% by dry mass and 5% by dry mass, preferably between 0.01% by dry mass and 3% by dry mass relative to the total dry mass of component A.

[0086] According to a preferred embodiment, the carboxylic acid is added in a total amount between 0.005% by dry mass and 5% by dry mass, preferably between 0.01% by dry mass and 3% by dry mass relative to the total dry mass of component A.

[0087] According to a preferred embodiment, the amino acid is added in a total amount between 0.005% by dry mass and 5% by dry mass, preferably between 0.01% by dry mass and 3% by dry mass relative to the total dry mass of component A.

[0088] According to a preferred embodiment, the reducing agent is added in a total amount between 0.005% by dry weight and 10% by dry weight, preferably between 0.01% by dry weight and 6% by dry weight, based on the total dry weight of component A.

[0089] According to an embodiment, any one of sulfamic acid, glyoxal, acetylacetone, pyrocatechol, nitrilotri(methylphosphonic acid), and etidronic acid is added in an amount between 0.05% by dry weight and 10% by dry weight, preferably between 0.1% by dry weight and 6% by dry weight, based on the total dry weight of component A.

[0090] When a mixture of two or more of the above accelerators B is used, - The mass ratio of the alkanolamine to the saccharide, - The mass ratio of the alkanolamine to the carboxylic acid, - The mass ratio of the alkanolamine to the amino acid, - The mass ratio of the saccharide to the amino acid, - The mass ratio of the carboxylic acid to the amino acid, or - The mass ratio of any of the alkanolamine, saccharide, carboxylic acid, and amino acid to any one of sulfamic acid, glyoxal, acetylacetone, pyrocatechol, nitrilotri(methylphosphonic acid), and etidronic acid (if present) is preferably in the range of 1:50 to 50:1, preferably 1:20 to 20:1.

[0091] When a mixture of two or more of the above accelerators B is used, the mass ratio of any selection or combination of the alkanolamine, saccharide, carboxylic acid, amino acid, sulfamic acid, glyoxal, acetylacetone, pyrocatechol, nitrilotri(methylphosphonic acid), and etidronic acid (if present) to any selection or combination of the mineral salt and the reducing agent is preferably in the range of 1:5000 to 1:1000, preferably 1:2500 to 1:1000.

[0092] Component C The hydraulic binder composition according to the present invention contains, based on the total dry mass of A, at least one kind of alkali activator for the reaction of at least one of A-1, A-2 and A-3 with water, which is different from B) and is selected from among alkali mineral salts and mixtures thereof, in an amount between 0.1% by dry mass and 5% by dry mass.

[0093] In a preferred embodiment, the alkali activator is Na 2 SO 4 、K 2 SO 4 、Li 2 SO 4 、Na 2 CO 3 、K 2 CO 3 、Li 2 CO 3 、NaNO 3 、KNO 3 、LiNO 3 、NaNO 2 、KNO 2 、LiNO 2 、Na 2 SiO 4 、K 2 SiO 4 、Li 2 SiO 4 、and is selected from the group containing mixtures thereof, preferably Na 2 SO 4 .

[0094] In a specific embodiment, the hydraulic binder composition according to the present invention contains, based on the total dry mass of A, an alkali activator different from B) for the reaction of at least one of A-1, A-2 and A-3 with water, in an amount between 0.5% by dry mass and 4% by dry mass, preferably between 1% by dry mass and 3% by dry mass, more preferably between 1.5% by dry mass and 2.5% by dry mass.

[0095] Component D The composition according to the invention comprises at least one fluidizing agent selected from alkali mineral salts and mixtures thereof, in an amount between 0.1% by dry mass and 2% by dry mass relative to the total dry mass of A.

[0096] In a preferred embodiment, the fluidizing agent is a superplasticizer selected from the group consisting of lignosulfonic acid polymers, melamine sulfonic acid polymers, naphthalene sulfonic acid polymers, polycarboxylic acid ether polymers, polyoxyethylene phosphonates, vinyl copolymers, methallyl ether polycarboxylic acid ethers, and mixtures thereof.

[0097] In a specific embodiment, the hydraulic binder composition according to the invention comprises a fluidizing agent between 0.2% by dry mass and 1.8% by dry mass relative to the total dry mass of A, preferably between 0.5% by dry mass and 1.5% by dry mass, more preferably between 0.8% by dry mass and 1.2% by dry mass.

[0098] Dry concrete composition or industrial dry mortar composition The invention also relates to a dry concrete composition or an industrial dry mortar composition, specifically a tile adhesive, a coating, an assembly mortar, a repair mortar, a render, a technical mortar and a floor covering mortar comprising at least one aggregate and the above-described hydraulic binder composition. The dry concrete or industrial mortar composition may ultimately contain other admixtures and additives.

[0099] According to the invention, a "dry" concrete composition or an industrial "dry" mortar composition refers to a composition in powder form that can be immediately mixed with water. In other words, the dry concrete composition or industrial dry mortar composition of the invention may contain some moisture, but substantially contains solid components intended to be mixed with water before its application.

[0100] Aggregates include a wide category of granular materials used in structures, including sand, gravel, crushed stone, slag (non-granulated), recycled concrete, and geosynthetic aggregates. They act as reinforcing materials that add strength to the overall composite material.

[0101] Advantageously, said industrial dry concrete or dry mortar composition may also contain, separately from the aggregates, one or more raw materials, in particular functional admixtures, additives and fibers. In particular, these raw materials are selected from the group consisting of fillers, additional cementitious materials, water-reducing polymers, latexes, water-retaining agents such as the following compounds, rheology agents, defoaming agents / antifoaming agents, biocides, pigments, flame retardants, air-entraining agents and retarders.

[0102] · Water-retaining agent. The water-retaining agent has the property of retaining the water mixed before the setting process. The water is trapped in the water-containing formulated paste, improving its adhesion. To a certain extent, the water is not absorbed much by the support.

[0103] The water-retaining agent is preferably selected from the group including modified cellulose, modified guar, modified cellulose ether and / or guar ether and mixtures thereof, more preferably the group consisting of methyl cellulose, methyl hydroxypropyl cellulose, methyl hydroxyethyl-cellulose and mixtures thereof.

[0104] · Rheology agent Possible rheology agents (also referred to as "thickeners") are preferably selected from the group including starch ether, cellulose ether and / or gums (such as welan gum xanthan, succinoglycan), modified polysaccharides (preferably those in the category of modified starch ether), polyvinyl alcohol, polyacrylamide, sepiolite, and mixtures thereof, more preferably the group consisting of them.

[0105] · Defoaming agent / antifoaming agent Possible defoaming agents are preferably selected from the group consisting of polyether polyols and their mixtures, more preferably the group consisting of them.

[0106] · Biocide Possible biocides are preferably selected from the group consisting of mineral oxides such as zinc oxide and their mixtures, more preferably the group consisting of them.

[0107] · Pigment Possible pigments are preferably selected from the group consisting of TiO 2 , iron oxide and their mixtures, more preferably the group consisting of them.

[0108] · Flame retardant Flame retardants (or fire retardants) can improve fire resistance and / or reduce the burning rate of the composition.

[0109] · Air entraining agent Air entraining agents (surfactants) are preferably selected from the group consisting of natural resins, sulfuric acid compounds or sulfonic acid compounds, synthetic detergents, organic fatty acids and their mixtures, more preferably the group consisting of them; preferably the group consisting of lignosulfonic acid, basic soaps of fatty acids and their mixtures, more preferably the group consisting of them, and more preferably the group consisting of olefin sulfonic acid, sodium lauryl sulfate and their mixtures, more preferably the group consisting of them.

[0110] · Retarder Retarders are preferably selected from the group consisting of tartaric acid and its salts: sodium or potassium salts, citric acid and its salts: sodium (trisodium citrate) and their mixtures, more preferably the group consisting of them.

[0111] Furthermore, other components may be as follows. · Fiber · Dispersion powder · Wetting agent · Polymer resin · Complexing agent · Polyol-based drying shrinkage reducing agent

[0112] The total content of any other components in the dry mortar composition is preferably between 0.01% and 10% by mass, advantageously between 0.1% and 8% by mass, more advantageously between 0.5% and 5% by mass of the total mass of the binder composition described above.

[0113] Wet concrete composition or industrial wet mortar composition The present invention also relates to a wet concrete composition or an industrial wet mortar composition, specifically a tile adhesive, a coating, an assembly mortar, a repair mortar, a render, a technical mortar, and a floor covering mortar containing at least one aggregate, the hydraulic binder composition described above, and water.

[0114] In certain embodiments, the industrial wet mortar composition is a so-called "ready-to-use" mortar. "Ready-to-use" mortars are used for assembling bricks or blocks on a construction site. They are obtained by directly mixing all the components of the composition (binder, aggregate, and other components) with water in a mixing plant. They contain a setting retarder and allow for transportation and use postponed for up to several days while maintaining their rheology and hardening properties.

[0115] Method for preparing a wet concrete composition or a wet mortar composition The present invention also relates to a method for preparing a wet concrete composition or an industrial wet mortar composition as described above, which includes a step of mixing water with at least one aggregate and the hydraulic binder composition described above, wherein the hydraulic binder composition is prepared in situ separately and / or in a premixed form from at least a plurality of different components of the hydraulic binder composition before or during the mixing step.

[0116] The present invention also relates to a method for preparing the above-described wet concrete composition or industrial wet mortar composition, which includes a step of mixing water with at least one kind of aggregate and the above-described hydraulic binder composition, wherein the hydraulic binder composition is prepared in situ, separately and / or in a premixed form from different components of the hydraulic binder composition, before or during the mixing step.

[0117] In other words, the wet concrete composition or industrial wet mortar composition can be prepared by two completely different methods.

[0118] In the first method, the binder composition is prepared and then mixed with at least one kind of aggregate. Thereafter, the dry concrete composition or dry mortar composition is mixed with water.

[0119] In the second method, the wet concrete composition or industrial wet mortar composition is prepared by mixing each component of the binder composition and the aggregate in water.

[0120] According to the present disclosure, the term "mixing step" should be understood as any form of mixing step.

[0121] In a preferred embodiment, a part of the binder composition and at least a part of the water are mixed together before being mixed with the aggregate.

[0122] In a preferred embodiment, the method is carried out at a mass ratio of water to hydraulic binder that is between 0.1 and 0.6, preferably between 0.15 and 0.45, and more preferably between 0.2 and 0.4.

[0123] Hardened concrete composition or hardened industrial mortar composition The present invention also relates to a hardened concrete composition or hardened industrial mortar composition obtained from the above-described wet concrete composition or industrial wet mortar composition.

Examples

[0124] (Example 1) Synergistic effect of a combination of at least one of A-1, A-2, and A-3 of the binder (Component A-3) and a different kind of alkali activator (Component C) from B) of the reaction with water Four types of dry hydraulic binder compositions, HB1, HB2, HB3, and HB4, were prepared by mixing their components in the dry state. Then, HB1, HB2, HB3, and HB4 were mixed separately with water so that the ratio of the dry hydraulic binder composition to water was 0.3, and with standard sand so that the ratio of the dry hydraulic binder composition to standard sand was 0.43, and four types of mortar compositions, MHB1, MHB2, MHB3, and MHB4, were obtained as shown in Table 1 below. The compressive strength of the obtained compositions was measured according to the standard NF EN 196-1, and the results are shown in Table 1 below.

[0125] [Table 1]

[0126] As can be seen from Table 1, the separate presence of Na 2 SO 4 (MHB2) or OPC (MHB3) significantly reduces the compressive strength on the first day, but the presence of both Na 2 SO 4 and OPC (MHB4) significantly increases the compressive strength on the first day. This indicates an unexpected improvement in the compressive strength on the first day of the BOF containing mortar due to the surprising synergistic technical effect of Na 2 SO 4 and OPC.

[0127] (Example 2) Increase in the amount of BOF (Component A-1) A further dried hydraulic binder composition, HB5, was prepared by mixing its components in the dry state. Then HB5 was mixed separately with water such that the ratio of the dried hydraulic binder composition to water was 0.3, and with standard sand such that the ratio of the dried hydraulic binder composition to standard sand was 0.43, to obtain a mortar composition MHB5 as reflected in Table 2 below. The compressive strength of the resulting composition was measured according to standard NF EN 196-1, and the results are shown in Table 2 below.

[0128] [Table 2]

[0129] It can be seen from Table 2 that the amount of BOF in the mortar according to the present invention can be increased.

[0130] (Example 3) Reduction in the amount of cobinder (Component A-3) A further dried hydraulic binder composition, HB6, was prepared by mixing its components in the dry state. Then HB6 was mixed with water such that the ratio of the dried hydraulic binder composition to water was 0.3, and with standard sand such that the ratio of the dried hydraulic binder composition to standard sand was 0.43, to obtain a mortar composition MHB6 as reflected in Table 3 below. The compressive strength of the resulting composition was measured according to standard NF EN 196-1, and the results are shown in Table 3 below.

[0131] [Table 3]

[0132] It can be seen from Table 3 that the amount of OPC can be reduced by the presence of more BOF and GGBS.

[0133] (Example 4) Change of Component A-2 Four additional dry hydraulic binder compositions, HB7, HB8, HB9 and HB10, were prepared by mixing their components in the dry state. Then, each composition was separately mixed with water such that the ratio of the dry hydraulic binder composition to water was 0.3 and with standard sand such that the ratio of the dry hydraulic binder composition to standard sand was 0.43, and two mortar compositions, MHB7, MHB8, MHB9 and MHB10, were obtained as reflected in Table 4 below. The compressive strength of the obtained compositions was measured according to the standard NF EN 196-1, and the results are shown in Table 4 below.

[0134]

Table 4

[0135] From Table 4, it can be seen that natural pozzolan can be used instead of GGBS without significantly affecting the compressive strength on the 1st and 28th days. Also, replacing ground limestone with fly ash increases the compressive strength on the 28th day but slightly decreases the compressive strength on the 1st day, yet it is still acceptable. Also, an increase in the ground filler content did not affect the compressive strength on the 1st day but slightly decreased the compressive strength on the 28th day, yet it is still acceptable.

Claims

1. A) The following mixture: A-1) At least one steelmaking slag between 20% and 95% by dry mass, A-2) At least one slag different from A-1 between 4% and 79% by dry mass, and / or at least one pozzolanic material and / or at least one inert filler, A-3) At least one binder between 1% and 25% by dry mass, preferably a clinker source and / or a lime source different from A-1 and A-2, B) At least one steelmaking slag promoter between 0.01% and 10% by dry mass based on the total dry mass of A, C) At least one alkali activator for reacting A-1, A-2 and / or A-3 with water between 0.1% and 5% by dry mass based on the total dry mass of A, different from B, and C is selected from alkali mineral salts and mixtures thereof, D) At least one fluidizing agent between 0.1% and 2% by dry mass based on the total dry mass of A A hydraulic binder composition comprising.

2. The hydraulic binder composition according to claim 1, wherein the steelmaking slag is selected from the group consisting of basic oxygen furnace slag (BOF), Linz-Donawitz (LD) slag, electric arc furnace (EAF) slag and mixtures thereof.

3. The hydraulic binder composition according to claim 1 or 2, wherein the slag different from A-1 is ground granulated blast furnace slag (GGBS).

4. The pozzolanic material is selected from the group consisting of natural pozzolan, pumice, silica fume, precipitated silica, fly ash, calcined shale, metakaolin, calcined ilite, calcined bentonite, calcined montmorillonite, calcined smectite, biomass ash, rice husk ash, diatomaceous earth, crushed opal, carbonated steelmaking slag, carbonated olivine, carbonated wollastonite, all-carbonated silicate-containing minerals, crushed waste glass and mixtures thereof. The hydraulic binder composition according to any one of claims 1 to 3.

5. The inert filler is selected from the group consisting of calcite powder, aragonite powder, vaterite powder, dolomite powder, precipitated calcium carbonate, quartz powder and mixtures thereof. The hydraulic binder composition according to any one of claims 1 to 4.

6. The hydraulic binder composition according to any one of claims 1 to 5, wherein the clinker source is selected from the group consisting of ordinary Portland cement (OPC), Portland clinker, Portland clinker-containing cement, and cements specified in standards EN 197-1 and NF EN 197-5, and mixtures thereof.

7. The hydraulic binder composition according to any one of claims 1 to 6, wherein the lime source is selected from the group consisting of quicklime, hydrated lime, natural hydraulic lime, and mixtures thereof.

8. The steel slag accelerator is selected from the group consisting of triethanolamine (TEA), triisopropanolamine (TIPA), diethanol isopropanolamine (DEIPA), ethanol diisopropanolamine (EDIPA), fructose, mannose, maltose, glucose, galactose, dextrin, vinasse, molasses, gluconic acid, ascorbic acid, neuraminic acid, glucuronic acid, galacturonic acid, iduronic acid, mucic acid, saccharic acid and their sodium, potassium or calcium salts, formic acid, glycolic acid, citric acid, lactic acid, malic acid, tartaric acid, oxalic acid, malonic acid, succinic acid, glutaric acid, adipic acid, salicylic acid and their sodium, potassium or calcium salts, glycine, glutamic acid, aspartic acid, polyaspartic acid, iminodisuccinic acid tetrasodium (IDS), diethylenetriamine pentaacetic acid (DTMA), nitrilotriacetic acid (NTA), sulfamic acid, glyoxal, acetylacetone, pyrocatechol, nitrilotri(methylphosphonic acid), etidronic acid, calcium nitrite, calcium nitrate, calcium chloride, magnesium chloride, calcium sulfate, aluminum sulfate, aluminum chloride, thiosulfate, especially sodium thiosulfate, thiocyanate, sulfite, and mixtures thereof, preferably triisopropanolamine (TIPA). The hydraulic binder composition according to any one of claims 1 to 7.

9. The alkali activator is Na 2 SO 4 、 K 2 SO 4 、 Li 2 SO 4 、 Na 2 CO 3 、 K 2 CO 3 、 Li 2 CO 3 、 NaNO 3 、 KNO 3 、 LiNO 3 、 NaNO 2 、 KNO 2 、 LiNO 2 、 Na 2 SiO 4 、 K 2 SiO 4 、 Li 2 SiO 4 、 and is selected from the group consisting of these and mixtures thereof, preferably Na 2 SO 4 ; the hydraulic binder composition according to any one of claims 1 to 8.

10. The hydraulic binder composition according to any one of claims 1 to 9, wherein the superplasticizer is a superplasticizer selected from the group consisting of lignosulfonic acid polymers, melamine sulfonic acid polymers, naphthalene sulfonic acid polymers, polycarboxylic acid ether polymers, polyoxyethylene phosphonates, vinyl copolymers, methallyl ether polycarboxylic acid ethers, and mixtures thereof.

11. A dry concrete composition or an industrial dry mortar composition, specifically a tile adhesive, coating, assembly mortar, repair mortar, render, technical mortar, and floor covering mortar containing at least one aggregate and the hydraulic binder composition according to any one of claims 1 to 10.

12. A wet concrete composition or an industrial wet mortar composition, specifically a tile adhesive, coating, assembly mortar, repair mortar, render, technical mortar, and floor covering mortar containing at least one aggregate, the hydraulic binder composition according to any one of claims 1 to 10, and water.

13. A hardened concrete composition or a hardened industrial mortar composition obtained from the wet concrete composition or the industrial wet mortar composition according to claim 12.

14. A method for preparing the wet concrete composition or the industrial wet mortar composition according to claim 12, comprising the step of mixing water with at least one aggregate and the hydraulic binder composition according to any one of claims 1 to 10, wherein the hydraulic binder composition is prepared in situ separately and / or in a premixed form from at least a plurality of different components of the hydraulic binder composition before or during the mixing step.

15. The method according to claim 14, wherein the mass ratio of water to the hydraulic binder composition is between 0.1 and 0.6, preferably between 0.15 and 0.45, more preferably between 0.2 and 0.4.

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