Construction material composition having high early and late strength

Abstract

The present invention relates to a binder composition comprising Portland cement clinker, calcium sulfate, an inorganic sulfate source having a solubility greater than 100 g / l at 20° C., a polyalcohol and / or a metal salt thereof, a carbonate selected from the group consisting of organic carbonates, alkali metal carbonates, and mixtures thereof, component F), and a dispersant having a charge density greater than 0.80 μeq / g.

Description

[Technical field]

[0001] The present invention relates to a binder composition comprising Portland cement clinker, calcium sulfate, an inorganic sulfate source having a solubility greater than 100 g / l at 20° C., a polyalcohol and / or a metal salt thereof, a carbonate selected from the group consisting of organic carbonates, alkali metal carbonates, and mixtures thereof, component F), and a dispersant having a charge density greater than 0.80 μeq / g.

[0002] Mortar and cement are formulations based on Portland cement clinker. Such cement systems are being monitored more frequently considering the environmental aspects due to CO2 emissions. A trend in the cement industry to address said CO2 emissions is to use more supplementary cementitious materials in Ordinary Portland Cement (OPC), such as limestone, slag, fly ash, and recently newly developed calcined clay (Scrivener et al., Cement and Concrete Research, 114, 2018).

[0003] A common drawback of using large amounts of supplementary cementitious materials in the cement is the relatively low early strength. Systems admixed with calcined clay and limestone (so-called LC 3 In the case of 100% OPC cement (using about 50% OPC), the performance of the cement is comparable to the OPC in many aspects, such as long-term strength (Antoni et al., Cement and Concrete Research, 42, 2012) and durability (Scrivener et al., Advances in Civil Engineering Materials, 8, 2019). However, the early strength is relatively lower compared to the OPC due to the reduced amount of C3S resulting from OPC contributing to the early strength.

[0004] It is known in the art that additives may be added to aqueous slurries or powder dispersions to improve the early strength. However, such additives can achieve workability, i.e. kneadability, spreadability, sprayability, pumpability, or flowability. Therefore, further additives are needed to provide sufficient workability. Such additives can prevent the formation of solid aggregates and disperse already existing particles and particles newly formed by hydration, and thus improve the workability. This effect is utilized, for example, in the manufacture of construction material compositions containing hydraulic binders, such as cement, lime, gypsum, hemihydrate or anhydrite. For example, set regulators or retarders can be used as additives to delay the hydration reaction and improve the workability. The retarders delay hydration during setting by inhibiting the dissolution of reactive cement components, especially aluminates, and / or by masking calcium ions, thereby slowing down the hydration reaction. DE 42 17 181 A1 discloses condensation products of melamine and glyoxylic acid as additives for hydraulic binders.

[0005] WO2016206780 describes additives that enhance strength development in hydraulic binders, including certain alkanolamines. However, it remains unclear whether workability is affected.

[0006] Against this background, it was an object of the present invention to provide a binder composition which provides high early and / or later strength with sufficient workability. Furthermore, it was an object of the present invention to provide a construction material composition with a reduced CO2 profile. It was also an object of the present invention to provide a binder composition with a reduced amount of Portland cement clinker which provides comparable early and / or later strength compared to OPC with a higher amount of Portland cement clinker.

[0007] It has been surprisingly found that the above-mentioned object can be achieved by the binder composition comprising the specific additive components as claimed in the claims.It has further been found that the specific retarding admixtures and dispersing agents having a charge density of more than 0.80 μeq / g described herein can be used to improve the spreading and / or compressive strength of construction material compositions, to delay the setting of inorganic binders containing building material formulations and / or to manufacture building products.

[0008] Therefore, in a first aspect, the present invention relates to a binder composition comprising: A) Portland cement clinker in an amount of 25 to 94.089% by weight; B) calcium sulfate xH2O in an amount of 5 to 20% by weight, where x is selected from 0 to 2; C) an inorganic sulfate source having a solubility of more than 100 g / l at 20° C. in an amount of 0.3 to 10% by weight; D) polyalcohols and / or metal salts thereof in an amount of 0.2 to 5% by weight, E) a carbonate selected from the group consisting of organic carbonates, alkali metal carbonates, and mixtures thereof, in an amount of 0.3 to 5% by weight; F) an amount of 0.101 to 3.5% by weight of a component F) selected from the group consisting of compounds of formula (I), polycondensates of the compounds of formula (I) and mixtures thereof, wherein formula (I) is [ka] wherein: R1 is OH; R2 is H, OH, C1-C6 alkoxy, -SO2X, -SO3X, -OSO3X, -PO, -PO3X2, -OPO3X2, -Z-COOX or -CH(OH)-SO3X; R3 is H, COOX, C3-C6 alkyl or C1-C6 alkoxy optionally substituted by 1-6 OH; m is 0 or 1, or When m is 0, R1 and R2 together with the carbon atom to which they are attached form a carbonyl group; R4 is COOY or SO3X, X is H or a cation equivalent, K a wherein K is selected from an alkali metal cation, an alkaline earth metal cation, a zinc cation, an iron cation, an ammonium cation, or a phosphonium cation, and a is 1 / n, where n is the valence of the cation; Y is selected from X, C1-C6 alkyl or phenyl; and Z is CH2 or CH(OH), and G) A dispersant having a charge density of more than 0.80 μeq / g in an amount of 0.01 to 1% by weight. based on the total weight of the binder composition.

[0009] In the following, preferred embodiments of the components of the binder composition are described in more detail, it being understood that each preferred embodiment is relevant both alone as well as in combination with other preferred embodiments.

[0010] In a preferred embodiment A1 of the first aspect, the polyalcohol (and / or metal salt thereof) is selected from the group consisting of: i) NR 1 R 2 R 3 , where R 1 ~R 3 are independently C1-C6-hydroxyalkyl, (CH2O)n -OH, (CH2CH2O) n -OH, (CH2CH2CH2O) n -OH, (CHOH) n -C(=O)H or (CHOH) n -CHOH, where n is an integer from 1 to 10; ii) R 5 -(CHOH) o -R 4 , where R 4 and R 5 is independently selected from the group consisting of C1-C6-hydroxyalkyl, C2-C6-hydroxyalkenyl, C1-C6-aminoalkyl, -OH, C1-C5-alkyl, C(=O)H, or C(=O)OH, where o is an integer from 0 to 5, and mixtures thereof, and preferably the polyalcohol (and / or metal salt thereof) is selected from the group consisting of i) NR 1 R 2 R 3 and ii) R. 5 -(CHOH) o -R 4 It is a mixture of.

[0011] In a preferred embodiment A2 of the first aspect, the polyalcohol (and / or metal salt thereof) is selected from the group consisting of: i) NR 1 R 2 R 3 , where R 1 ~R 3 is independently C1-C6-hydroxyalkyl; ii) R 5 -(CHOH) o -R 4 , where R 4 and R 5 is independently selected from the group consisting of C1-C6-hydroxyalkyl, where o is an integer from 0 to 1, and mixtures thereof, and preferably the polyalcohol (and / or metal salt thereof) is selected from the group consisting of i) NR 1 R 2 R 3 , where R 1 ~R 3 is C-C-hydroxyalkyl, and ii) R 5-(CHOH) o -R 4 , where R 4 and R 5 are independently C1-C2-hydroxyalkyl, where o is an integer from 0 to 1, and in particular, said polyalcohol (and / or metal salt thereof) is a mixture of i) triethanolamine and ii) glycerol or a mixture of i) triethanolamine calcium salt and ii) calcium glycerolate.

[0012] In a preferred embodiment A3 of the first aspect, the carbonate is an alkali metal carbonate selected from the group consisting of sodium carbonate, sodium bicarbonate, potassium carbonate, potassium bicarbonate, lithium carbonate, lithium bicarbonate, and mixtures thereof, preferably sodium bicarbonate.

[0013] In a preferred embodiment A4 of the first aspect, the inorganic sulfate source is an alkali metal sulfate selected from the group consisting of potassium sulfate, sodium sulfate, lithium sulfate, and mixtures thereof, preferably sodium sulfate, and / or the calcium sulfate is calcium sulfate anhydrous.

[0014] In a preferred embodiment A5 of said first aspect, said dispersant has a charge density of more than 1.20 μeq / g, preferably more than 1.2 μeq / g to 14 μeq / g, more preferably from 1.5 to 10.0 μeq / g, and especially from 2.0 to 5.0 μeq / g.

[0015] In a preferred embodiment A6 of the first aspect, the dispersant is a comb polymer comprising acid functionalized units having at least one structural unit of the general formula (Ia), (Ib), (Ic) and / or (Id): [ka] During the ceremony, R 1is H or an unbranched or branched C1-C4 alkyl group, CH2COOH or CH2CO-XR 2 , preferably H or CH3; X is NH-(C n H 2n ), O(C n H 2n ) (wherein n=1, 2, 3 or 4), wherein the nitrogen atom or the oxygen atom is bonded to the CO group or is a chemical bond, preferably X is a chemical bond or O(C n H 2n ) and R 2 is OM, PO3M2, or O-PO3M2, where X is R 2 is a chemical bond when is OM, [ka] During the ceremony, R 3 is H or an unbranched or branched C1-C4 alkyl group, preferably H or CH3; n is 0, 1, 2, 3 or 4, preferably 0 or 1; R 4 is PO3M2, or O-PO3M2, [ka] During the ceremony, R 5 is H or an unbranched or branched C1-C4 alkyl group, preferably H; Z is O or NR 7 , preferably O; R 7 is H, (C n H 2n )-OH, (C n H 2n )-PO3M2, (C n H 2n )-OPO3M2, (C6H4)-PO3M2, or (C6H4)-OPO3M2, and n is 1, 2, 3 or 4, preferably 1, 2 or 3; [ka] During the ceremony, R 6 is H or an unbranched or branched C1-C4 alkyl group, preferably H; Q is NR 7 or O, preferably O, R 7 is H, (C n H 2n )-OH, (C n H 2n )-PO3M2, (C n H 2n )-OPO3M2, (C6H4)-PO3M2, or (C6H4)-OPO3M2; n is 1, 2, 3 or 4, preferably 1, 2 or 3, and Each M is, independently of the others, H or a cation equivalent, and / or the dispersant is a comb polymer comprising units having polyether side chains having at least one structural unit of the general formula (IIa), (IIb), (IIc) and / or (IId): [ka] During the ceremony, R 10 , R 11 and R 12 are each independently H or an unbranched or branched C1-C4 alkyl group, Z is O or S; E is an unbranched or branched C1-C6 alkylene group, a cyclohexylene group, CH2-C6H 10 , 1,2-phenylene, 1,3-phenylene or 1,4-phenylene; G is O, NH or CO-NH; or E and G together are a chemical bond, A is C x H 2x where x=2, 3, 4 or 5, preferably 2 or 3; or CH2CH(C6H5), n is 0, 1, 2, 3, 4 or 5, preferably 0, 1 or 2; a is an integer from 2 to 350, preferably from 5 to 150, more preferably from 20 to 135, and most preferably from 60 to 135; R 13 is H, an unbranched or branched C1-C4 alkyl group, CO-NH2 and / or COCH3; [ka] During the ceremony, R 16 , R 17 and R 18 are each independently H or an unbranched or branched C1-C4 alkyl group, E is an unbranched or branched C1-C6 alkylene group, a cyclohexylene group, CH2-C6H 10 , 1,2-phenylene, 1,3-phenylene, or 1,4-phenylene, or a chemical bond; A is C x H 2x where x=2, 3, 4 or 5, preferably 2 or 3; or CH2CH(C6H5), n is 0, 1, 2, 3, 4 and / or 5, preferably 0, 1 or 2; L is for C x H 2x where x=2, 3, 4 or 5, preferably 2 or 3; or CH2-CH(C6H5), a is an integer of 2 to 350, preferably 5 to 150; d is an integer of 1 to 350, preferably 5 to 150; R 19 is H or an unbranched or branched C1-C4 alkyl group, R 20 is H or an unbranched C1-C4 alkyl group; [ka] During the ceremony, R 21, R 22 and R 23 are each independently H or an unbranched or branched C1-C4 alkyl group, W is O, NR 25 or N, Y is W=O or NR 25 1 if and W=N; or 2 if and A is C x H 2x where x=2, 3, 4 or 5, preferably 2 or 3; or CH2CH(C6H5), a is an integer from 2 to 350, preferably from 5 to 150, more preferably from 20 to 135, and most preferably from 60 to 135; R 24 is H or an unbranched or branched C1-C4 alkyl group, and R 25 is H or an unbranched or branched C1-C4 alkyl group; [ka] During the ceremony, R 6 is H or an unbranched or branched C1-C4 alkyl group, Q is NR 10 , N or O; Y is W=O or NR 10 1 if and 2 if W=N; R 10 is H or an unbranched or branched C1-C4 alkyl group, and A is C x H 2x where x=2, 3, 4 or 5, preferably 2 or 3; or CH2C(C6H5)H; R 24 is H or an unbranched or branched C1-C4 alkyl group, M is H or a cation equivalent, and a is an integer of 2 to 350, preferably 5 to 150, more preferably 20 to 135, and most preferably 60 to 135.

[0016] In a preferred embodiment A7 of the first aspect, the dispersant is a phosphorylated polycondensation product comprising structural units (III) and (IV): [ka] During the ceremony, T is a substituted or unsubstituted phenyl or naphthyl group, or a substituted or unsubstituted heteroaromatic group having 5 to 10 ring atoms, one or two of which are heteroatoms selected from N, O and S; n is 1 or 2; B is N, NH or O with the proviso that n is 2 when B is N, and with the proviso that n is 1 when B is NH or O; A is an unbranched or branched alkylene having 2 to 5 carbon atoms or CH2CH(C6H5); a is an integer from 1 to 300; R 25 is H, branched or unbranched C1-C 10 an alkyl group, a C5-C8 cycloalkyl group, an aryl group, or a heteroaryl group having 5 to 10 ring atoms, one or two of which are heteroatoms selected from N, O, and S; wherein said structural unit (IV) is selected from structural units (IVa) and (IVb): [ka] During the ceremony, D is a substituted or unsubstituted phenyl or naphthyl group, or a substituted or unsubstituted heteroaromatic group having 5 to 10 ring atoms, one or two of which are heteroatoms selected from N, O and S; E is N, NH or O, with the proviso that m is 2 when E is N, and with the proviso that m is 1 when E is NH or O; A is an unbranched or branched alkylene having 2 to 5 carbon atoms or CH2CH(C6H5); b is an integer from 0 to 300; M are each independently H or a cation equivalent; [ka] During the ceremony, V is a substituted or unsubstituted phenyl or naphthyl group, and optionally R 8 , O.H., O.R. 8 , (CO)R 8 , COOM, COOR 8 , SO3R 8 and NO2, R 7 is COOM, OCH2COOM, SO3M or OPO3M2, M is H or a cation equivalent, and R 8 is C1-C4 alkyl, phenyl, naphthyl, phenyl-C1-C4 alkyl or C1-C4 alkylphenyl.

[0017] In a preferred embodiment A8 of said first aspect, said component F) comprises a hydroxycarboxylic acid or a polycondensate of said hydroxycarboxylic acid or a sulfite addition product of said hydroxycarboxylic acid or of citric acid or of tartaric acid, preferably said hydroxycarboxylic acid or said polycondensate of said hydroxycarboxylic acid or said sulfite addition product of said hydroxycarboxylic acid is glyoxylic acid or a polycondensate of glyoxylic acid or a sulfite addition product of glyoxylic acid, more preferably said polycondensate of glyoxylic acid is an amine-glyoxylic acid condensate, even more preferably said amine-glyoxylic acid condensate is selected from the group consisting of melamine-glyoxylic acid condensates, urea-glyoxylic acid condensates, melamine-urea-glyoxylic acid condensates and polyacrylamide-glyoxylic acid condensates, in particular a urea-glyoxylic acid condensate.

[0018] In a preferred embodiment A9 of the first aspect, component F) comprises the moiety R2 is H; R3 is a C3-C6 alkyl optionally substituted with 1-5 OH; and R4 is COOY, and Y is X, which is an alkali metal and preferably, the salt is sodium gluconate.

[0019] In a preferred embodiment A10 of the first aspect, said component F) comprises at least two compounds selected from the group consisting of compounds of formula (I) and polycondensates of said compounds of formula (I), preferably component F) comprises a mixture of compounds of formula (I) and polycondensates of said compounds of formula (I), more preferably component F) comprises a mixture of a polycondensate of glyoxylic acid and R2 is H; R3 is a C3-C6 alkyl optionally substituted with 1-5 OH; and R4 is COOY, and Y is X, which is an alkali metal and a salt of formula (I) having the formula:

[0020] In a preferred embodiment A11 of the first aspect, the binder composition further comprises: H) supplemental cementitious material in an amount of 0.5 to 68.989% by weight based on the total weight of the binder composition. and preferably said supplemental cementitious material is selected from the group consisting of slag, fly ash, natural pozzolans, calcined clay, silica fume, limestone, and mixtures thereof, preferably limestone.

[0021] In a second aspect, the present invention relates to the use of a retarder admixture (RM), the retarder admixture (RM) having, based on the total weight of the retarder admixture (RM), RM1) a carbonate selected from the group consisting of organic carbonates, alkali metal carbonates, and mixtures thereof, in an amount of 30-60% by weight; RM2) NR in an amount of 5-20% by weight 1 R 2 R 3 and / or a metal salt thereof, where R 1 ~R 3 are independently C1-C6-hydroxyalkyl; RM3) 10 to 30% by weight of R 5 -(CHOH) o -R 4 and / or a metal salt thereof, where R 4 and R 5 is independently C1-C6-hydroxyalkyl, and o is an integer of 0 to 1; RM4) a component RM4) selected from the group consisting of the compounds of formula (I), polycondensates of the compounds of formula (I) and mixtures thereof, in an amount of 12 to 50% by weight, where formula (I) is [ka] wherein: R1 is OH; R2 is H, OH, C1-C6 alkoxy, -SO2X, -SO3X, -OSO3X, -PO, -PO3X2, -OPO3X2, -Z-COOX or -CH(OH)-SO3X; R3 is H, COOX, C3-C6 alkyl or C1-C6 alkoxy optionally substituted with 1-6 OH; m is 0 or 1, or When m is 0, R1 and R2 together with the carbon atom to which they are attached form a carbonyl group; R4 is COOY or SO3X, X is H or a cation equivalent, K a wherein K is selected from an alkali metal cation, an alkaline earth metal cation, a zinc cation, an iron cation, an ammonium cation, or a phosphonium cation, and a is 1 / n, where n is the valence of the cation; Y is selected from X, C1-C6 alkyl or phenyl; and Z is CH2 or CH(OH); and a dispersant having a charge density greater than 0.80 μeq / g; The present invention relates to said use for improving the spreadability and / or the compressive strength of a construction material composition comprising Portland cement clinker, calcium sulfate, sodium sulfate and optionally auxiliary cementitious materials.

[0022] In a third aspect, the present invention relates to a concrete comprising the binder composition according to the first aspect.

[0023] In a fourth aspect, the present invention relates to the use of a retarder admixture (RM), comprising, based on the total weight of said retarder admixture (RM), RM1) a carbonate selected from the group consisting of organic carbonates, alkali metal carbonates, and mixtures thereof, in an amount of 30-60% by weight; RM2) NR in an amount of 5-20% by weight 1 R 2 R3 and / or a metal salt thereof, where R 1 ~R 3 are independently C1-C6-hydroxyalkyl; RM3) 10 to 30% by weight of R 5 -(CHOH) o -R 4 and / or a metal salt thereof, where R 4 and R 5 is independently C1-C6-hydroxyalkyl, and o is an integer of 0 to 1; RM4) a component RM4) selected from the group consisting of the compounds of formula (I), polycondensates of the compounds of formula (I) and mixtures thereof, in an amount of 12 to 50% by weight, where formula (I) is [ka] wherein: R1 is OH; R2 is H, OH, C1-C6 alkoxy, -SO2X, -SO3X, -OSO3X, -PO, -PO3X2, -OPO3X2, -Z-COOX or -CH(OH)-SO3X; R3 is H, COOX, C3-C6 alkyl or C1-C6 alkoxy optionally substituted with 1-6 OH; m is 0 or 1, or When m is 0, R1 and R2 together with the carbon atom to which they are attached form a carbonyl group; R4 is COOY or SO3X, X is H or a cation equivalent, K a wherein K is selected from an alkali metal cation, an alkaline earth metal cation, a zinc cation, an iron cation, an ammonium cation, or a phosphonium cation, and a is 1 / n, where n is the valence of the cation; Y is selected from X, C1-C6 alkyl or phenyl; and Z is CH2 or CH(OH); and a dispersant having a charge density greater than 0.80 μeq / g; Said use for retarding the hardening of building material formulations containing inorganic binders and / or for producing building products.

[0024] Detailed Description Before describing detailed illustrative embodiments of the present invention, definitions important for understanding the present invention are presented.

[0025] When used in this specification and the appended claims, the singular forms "a" and "an" also include the respective plural forms, unless the context clearly dictates otherwise. In the context of the present invention, the terms "about" and "approximately" represent an interval of accuracy that a person skilled in the art would understand to still ensure the technical effect of the feature in question. Said terms typically indicate a deviation from the indicated numerical value of ±20%, preferably ±15%, more preferably ±10%, and even more preferably ±5%. The term "comprising" should be understood as non-limiting. For the purposes of the present invention, the term "consisting of" should be considered as a preferred embodiment of the term "comprising of". If hereinafter a group is defined to include at least a certain number of embodiments, this is meant to include a group that preferably consists only of these embodiments. Furthermore, the terms "first", "second", "third" or "(a)", "(b)", "(c)", "(d)" and the like in the specification and claims are used to distinguish between similar elements and not necessarily to describe an order or chronological sequence. It should be understood that the terms so used are interchangeable under appropriate circumstances and that the embodiments of the invention described herein are capable of operating in orders other than those described or illustrated herein. When the terms "first", "second", "third" or "(a)", "(b)", "(c)", "(d)", "i", "ii" and the like refer to steps of a method or use or analysis, there is no consistency in the time or time interval between said steps, i.e., said steps may be performed simultaneously or there may be time intervals of seconds, minutes, hours, days, weeks, months or even years between such steps, unless otherwise indicated in the above or following applications of this specification. It should be understood that the present invention is not limited to the particular methodology, protocols, reagents, etc. described herein, which may vary.It should also be understood that the terminology used herein is for the purpose of describing particular embodiments only, and is not intended to limit the scope of the present invention, which will be limited only by the appended claims. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art.

[0026] The term "substituted" as used herein means that a hydrogen atom bonded to the designated atom is replaced with the specified substituent, provided that said replacement results in a stable or chemically feasible compound. Unless otherwise indicated, a substituted atom may have one or more substituents, and each substituent is independently selected.

[0027] The term "substitutable," when used in reference to a designated atom, means that bonded to said atom is a hydrogen, and said hydrogen can be replaced with a suitable substituent.

[0028] When it is said that a particular atom or moiety is substituted with "one or more" substituents, the term "one or more" is intended to encompass at least one substituent, e.g., 1 to 10 substituents, preferably 1, 2, 3, 4, or 5 substituents, more preferably 1, 2, or 3 substituents, and most preferably 1 or 2 substituents. If neither the term "unsubstituted" nor "substituted" is expressly recited in reference to a moiety, then said moiety should be considered to be unsubstituted.

[0029] The organic moieties described in the above variable definitions are collective terms for the individual listings of the individual group members, such as the term halogen. n ~C m each indicates the possible number of carbon atoms in said group.

[0030] The term "halogen" denotes fluorine, bromine, chlorine or iodine, respectively, in particular fluorine, chlorine or bromine.

[0031] The term "alkyl" as used herein refers to a straight-chain or branched alkyl group typically having 1 to 6 carbon atoms, preferably 1 to 5 or 1 to 4 carbon atoms, and more preferably 1 to 3 or 1 or 2 carbon atoms, respectively. Examples of alkyl groups are methyl, ethyl, n-propyl, isopropyl, n-butyl, 2-butyl, isobutyl, tert-butyl, n-pentyl, 1-methylbutyl, 2-methylbutyl, 3-methylbutyl, 2,2-dimethylpropyl, 1-ethylpropyl, n-hexyl, 1,1-dimethylpropyl, 1,2-dimethylpropyl, 1-methylpentyl, 2-methylpentyl, 3-methylpentyl, 4-methylpentyl, 1,1-dimethylbutyl, 1,2-dimethylbutyl, 1,3-dimethylbutyl, 2,2-dimethylbutyl, 2,3-dimethylbutyl, 3,3-dimethylbutyl, 1-ethylbutyl, 2-ethylbutyl, 1,1,2-trimethylpropyl, 1,2,2-trimethylpropyl, 1-ethyl-1-methylpropyl, and 1-ethyl-2-methylpropyl.

[0032] The term "alkoxy" as used herein refers to a straight or branched alkyl group bonded via an oxygen atom and typically having 1 to 6 carbon atoms, preferably 1 to 2 carbon atoms, more preferably 1 carbon atom, respectively. Examples of alkoxy groups are methoxy, ethoxy, n-propoxy, isopropoxy, n-butyloxy, 2-butyloxy, isobutyloxy, tert-butyloxy, and the like.

[0033] The term "hydroxyalkyl" as used herein refers to a linear or branched alkyl group, usually having 1 to 6 carbon atoms and further substituted with 1 to 5, preferably 1 to 2, hydroxy groups, in particular one hydroxy group, respectively. Preferably, said one hydroxy group terminates said linear or branched alkyl group, so that said hydroxy group is attached to an alkyl bridge which is attached to the remainder of the molecule. Examples of hydroxyalkyl groups are hydroxymethyl, hydroxyethyl, n-hydroxypropyl, 2-hydroxypropyl, n-hydroxybutyl, 2-hydroxybutyl, 2-hydroxy-2-methylpropyl, n-hydroxypentyl, and n-hydroxyhexyl. Hydroxymethyl, hydroxyethyl, hydroxypropyl, and hydroxybutyl are preferred, in particular hydroxyethyl.

[0034] The term "hydroxyalkenyl" as used herein refers to an unsaturated hydrocarbon group, usually having 2 to 6, preferably 2 to 4, carbon atoms, having at least one carbon-carbon double bond in any position, and further substituted with 1 to 5, preferably 1 to 2, hydroxy groups, in particular one hydroxy group. Preferably, said one hydroxy group terminates said unsaturated hydrocarbon group, so that said hydroxy group is attached to an alkenyl bridge which is attached to the rest of the molecule. Examples of hydroxyalkenyl are hydroxyvinyl, hydroxyallyl, hydroxymethallyl, hydroxybuten-1-yl, 2-hydroxy-2-penten-1-yl, 1-hydroxy-3-penten-1-yl, etc. In cases where geometric isomerism is possible with respect to said double bond, the present invention relates to both the E-isomer and the Z-isomer.

[0035] The term "aminoalkyl" as used herein denotes a linear or branched alkyl group, usually having 1 to 6 carbon atoms and further substituted with 1 to 5, preferably 1 to 2, amino groups, in particular one amino group, respectively. Preferably, said one amino group terminates said linear or branched alkyl group, so that said amino group is attached to an alkyl bridge which is attached to the rest of the molecule. Examples of aminoalkyl groups are aminomethyl, aminoethyl, n-aminopropyl, 2-aminopropyl, n-aminobutyl, 2-aminobutyl, 2-amino-2-methylpropyl, n-aminopentyl, and n-aminohexyl. Aminomethyl, aminoethyl, aminopropyl, and aminobutyl are preferred, in particular aminoethyl.

[0036] When referring to compositions and weight percentages of ingredients contained therein, it should be understood that in accordance with the present invention, the total amount of ingredients does not exceed 100% (±1% for rounding purposes).

[0037] The mineral phases are indicated by their common names followed by their cementitious designations. The major compounds are represented by their oxide species in the cementitious designations: C for CaO, S for SiO2, A for Al2O3, $ for SO3, H for H2O, and this designation is used throughout.

[0038] The term "Portland cement" generally refers to any cement compound containing Portland clinker, in particular CEM I, II, III, IV and V within the meaning of standard EN 197-1, paragraph 5.2. An exemplary cement is ordinary Portland cement (OPC) according to DIN EN 197-1, which may contain calcium sulfate (less than 7% by weight) or is essentially free of calcium sulfate (less than 1% by weight).

[0039] Calcium aluminate cement (also called CAC or high aluminate cement) means cement containing calcium aluminate phases. The term "aluminate phase" denotes any mineral phase resulting from the combination of aluminate (chemical formula Al2O3, or "A" in cement designation) with other mineral species. The amount of alumina (in the form of Al2O3) is at least 2% by weight, preferably at least 3% by weight, and more preferably at least 4% by weight of the total mass of said aluminate-containing cement, determined using X-ray fluorescence (XRF). More precisely, said mineral phases of aluminate type are, for example, tricalcium aluminate (C3A), monocalcium aluminate (CA), calcium-di-aluminate (CA2), mayenite (C3A), calcium-di-aluminate (CA3), calcium-di-aluminate (CA2), calcium-di-aluminate (CA3 ... 12 A7), gehlenite (C2AS), tetracalcium aluminoferrite (C4AF), or a combination of some of these phases.

[0040] Sulfoaluminate cement has a content of eelimite (chemical formula 4CaO·3Al2O3·SO3 or C4A3$ in cement notation) greater than 15% by weight.

[0041] The mineral phases in cement are typically determined using quantitative X-ray diffraction (XRD).

[0042] The term "construction material composition" as used herein refers to a composition that includes a binder composition and an aggregate, such as sand.

[0043] The term "binder composition" as used herein refers to a composition comprising a binder, such as Portland cement. The binder composition according to the present invention comprises fine granules, i.e. granules having a diameter of less than 0.125 mm.

[0044] As indicated above, the present invention relates in one embodiment to a binder composition comprising: A) Portland cement clinker in an amount of 25 to 94.089% by weight; B) calcium sulfate xH2O in an amount of 5 to 20% by weight, where x is selected from 0 to 2; C) an inorganic sulfate source having a solubility of more than 100 g / l at 20° C. in an amount of 0.3 to 10% by weight; D) polyalcohols and / or metal salts thereof in an amount of 0.2 to 5% by weight, E) a carbonate selected from the group consisting of organic carbonates, alkali metal carbonates, and mixtures thereof, in an amount of 0.3 to 5% by weight; F) a component F selected from the group consisting of compounds of formula (I), polycondensates of the compounds of formula (I) and mixtures thereof, in an amount of 0.101 to 3.5% by weight, wherein formula (I) is [ka] wherein: R1 is OH; R2 is H, OH, C1-C6 alkoxy, -SO2X, -SO3X, -OSO3X, -PO, -PO3X2, -OPO3X2, -Z-COOX or -CH(OH)-SO3X; R3 is H, COOX, C3-C6 alkyl or C1-C6 alkoxy optionally substituted by 1-6, preferably 1-5, OH; m is 0 or 1, or When m is 0, R1 and R2 together with the carbon atom to which they are attached form a carbonyl group; R4 is COOY or SO3X, X is H or a cation equivalent, K a wherein K is selected from an alkali metal cation, an alkaline earth metal cation, a zinc cation, an iron cation, an ammonium cation, or a phosphonium cation, and a is 1 / n, where n is the valence of the cation; Y is selected from X, C1-C6 alkyl or phenyl; and Z is CH2 or CH(OH), and G) A dispersant having a charge density of more than 0.80 μeq / g in an amount of 0.01 to 1% by weight. based on the total weight of the binder composition.

[0045] In a preferred embodiment, the binder composition comprises A) Portland cement clinker in an amount of 25 to 94.089% by weight; B) calcium sulfate xH2O, in an amount of 5 to 20% by weight, where x is selected from 0 to 2, C) an inorganic sulfate source having a solubility of more than 100 g / l at 20° C. in an amount of 0.3 to 10% by weight; D) a polyalcohol in an amount of 0.2 to 5% by weight, E) a carbonate selected from the group consisting of organic carbonates, alkali metal carbonates, and mixtures thereof, in an amount of 0.3 to 5% by weight; F) an amount of 0.101 to 3.5% by weight of a component F) selected from the group consisting of compounds of formula (I), polycondensates of the compounds of formula (I) and mixtures thereof, wherein formula (I) is [ka] wherein: R1 is OH; R2 is H, OH, C1-C6 alkoxy, -SO2X, -SO3X, -OSO3X, -PO, -PO3X2, -OPO3X2, -Z-COOX or -CH(OH)-SO3X; R3 is H, COOX, C3-C6 alkyl or C1-C6 alkoxy optionally substituted by 1-6, preferably 1-5, OH; m is 0 or 1, or When m is 0, R1 and R2 together with the carbon atom to which they are attached form a carbonyl group; R4 is COOY or SO3X, X is H or a cation equivalent, K awherein K is selected from an alkali metal cation, an alkaline earth metal cation, a zinc cation, an iron cation, an ammonium cation, or a phosphonium cation, and a is 1 / n, where n is the valence of the cation; Y is selected from X, C1-C6 alkyl or phenyl; and Z is CH2 or CH(OH), and G) a dispersant having a charge density of more than 0.80 μeq / g in an amount of 0.01 to 1 wt. %; based on the total weight of the binder composition.

[0046] Preferably, the charge density of the dispersant is calculated assuming that all acid groups (e.g., sulfonate, phosphate and carboxylate) are fully deprotonated. The charge density ρ is

number

[0047] In the following, preferred embodiments of said binder composition and its components, which are relevant for all aspects of the present invention, are described in more detail below, it being understood that each preferred embodiment is relevant both alone as well as in combination with other preferred embodiments.

[0048] According to the present invention, the term "Portland cement clinker" should be understood to refer to the sum of the clinker phases that do not contain any calcium sulfate phase, including, for example, alite (C3S), belite (C2S), brownmillerite (C4AF) or C3A and mixtures thereof.

[0049] In a preferred embodiment, the Portland cement clinker comprises primarily belite in an amount of more than 40% by weight, based on the total weight of the Portland cement clinker.

[0050] The clinker-containing material is preferably ordinary Portland cement (OPC) according to DIN EN 197-1:2011-11. Preferred OPCs are according to standards CEM I 42.5 N, CEM I 42.5 R, CEM I 52.5 N and CEM I 52.5 R or mixtures thereof with Portland cement clinker in an amount of at least 90% by weight, more preferably at least 92% by weight and in particular at least 94% by weight.

[0051] Preferably, the binder composition comprises the Portland cement clinker in an amount of 28-90 wt%, more preferably 30-80 wt%, based on the total weight of the binder composition. In a particular embodiment, the binder composition comprises the Portland cement clinker in an amount of 28-93.75 wt%, more preferably 30-91.86 wt%, based on the total weight of the binder composition.

[0052] The Portland cement clinker may be prepared with ordinary Portland cement, preferably containing an aluminate type selected from the group consisting of C3A, C4AF, and mixtures thereof.

[0053] In a preferred embodiment, the ordinary Portland cement comprises at least 1% by weight, more preferably at least 5% by weight, and even more preferably at least 10% by weight of aluminate types selected from the group consisting of C3A, C4AF, and mixtures thereof. It is further preferred that the ordinary Portland cement comprises less than 25% by weight, more preferably less than 22% by weight, and even more preferably less than 20% by weight of aluminate types selected from the group consisting of C3A, C4AF, and mixtures thereof. In a preferred embodiment, the ordinary Portland cement comprises less than 5% by weight, more preferably less than 4% by weight, and even more preferably less than 3% by weight of aluminate types CAC in the form of CA, C2AS, CA2, and C12A7. Preferably, the ordinary Portland cement according to the invention contains an aluminate phase and may additionally contain at least one sulfate source, preferably a calcium sulfate source. The calcium sulfate source may be selected from calcium sulfate dihydrate, anhydrite, α- and β-hemihydrate, i.e. α-bassanite and β-bassanite, or mixtures thereof. Preferably, the calcium sulfate is α-bassanite and / or β-bassanite.

[0054] In a preferred embodiment, the ordinary Portland cement comprises at least 3 wt.%, more preferably at least 4 wt.%, and even more preferably at least 4.5 wt.% CaSO4·xH2O, where x is selected from 0 to 1.5. It is further preferred that the ordinary Portland cement comprises at least 3 wt.% to less than 7 wt.%, more preferably at least 4 to 6 wt.%, and even more preferably 4.5 to 5.5 wt.% CaSO4·xH2O, where x is selected from 0 to 1.5.

[0055] Preferably, said C3A, C4AF, CA, C2AS, CA2, C12A7 and CaSO4·×H2O are determined using quantitative X-ray diffraction (XRD), in this connection it is preferred to carry out a Rietveld refinement for said analysis.

[0056] In a preferred embodiment, the ordinary Portland cement comprises at least 5% by weight, more preferably at least 10% by weight, and even more preferably at least 15% by weight of a sulfoaluminate type, such as eelimite, having the chemical formula 4CaO·3Al2O3·SO3 or C4A3$ in cement notation.

[0057] In a preferred embodiment, the ordinary Portland cement comprises CaSO4·xH2O, where x is selected from 0 to 1.5, and Al2O3, wherein the weight ratio of the CaSO4·xH2O to the amount of Al2O3 is 1:3 to 4:1, preferably 1:2 to 3:1.

[0058] In a preferred embodiment, the Portland cement clinker has a viscosity of at least 3800 cm 2 / g, preferably at least 4500 cm 2 / g. The Blaine surface area is used as a parameter of fineness of grinding. A finer grinding allows a higher reactivity. The Blaine surface area may be determined according to DIN EN 196-6.

[0059] Preferably, the binder composition comprises said calcium sulfate xH2O in an amount of 5 to 18 wt. %, more preferably 6 to 15 wt. %, based on the total weight of the binder composition.

[0060] In a preferred embodiment, x in the calcium sulfate xH2O is selected from 0 to 2, preferably 0.

[0061] It should be understood that the calcium sulfate xH2O in the binder composition may originate from the applied cement (e.g. ordinary Portland cement) and from supplementary added calcium sulfate. Preferably, the calcium sulfate xH2O in the binder composition originates from the applied cement and supplementary added calcium sulfate.

[0062] Preferably, the binder composition comprises said inorganic sulfate source having a solubility higher than 100 g / l at 20° C. in an amount of 0.4 to 8 wt. %, more preferably 0.5 to 6 wt. %, based on the total weight of the binder composition.

[0063] In a preferred embodiment, the inorganic sulfate source has a solubility of more than 100 g / l up to 1500 g / l at 20°C.

[0064] In a preferred embodiment, the inorganic sulfate source is an alkali metal sulfate selected from the group consisting of potassium sulfate, potassium bisulfate, sodium sulfate, sodium bisulfate, lithium sulfate, and mixtures thereof, preferably sodium sulfate.

[0065] Preferably, the binder composition comprises the polyalcohol (and / or its metal salt) in an amount of 0.2 to 4.5% by weight, more preferably 0.3 to 4.0% by weight, based on the total weight of the binder composition.

[0066] In a preferred embodiment, the polyalcohol (and / or metal salt thereof) comprises: i) NR 1 R 2 R 3 , where R 1 ~R 3 are independently C1-C6-hydroxyalkyl, (CH2O) n -OH, (CH2CH2O) n -OH, (CH2CH2CH2O) n -OH, (CHOH) n -C(=O)H or (CHOH) n -CHOH, and n is an integer from 1 to 10; ii) R 5 -(CHOH) o -R 4 , where R 4 and R 5is independently selected from the group consisting of C1-C6-hydroxyalkyl, C2-C6-hydroxyalkenyl, C1-C6-aminoalkyl, -OH, C1-C5-alkyl, C(=O)H, or C(=O)OH, where o is an integer from 0 to 5, and mixtures thereof.

[0067] Preferably, NR 1 R 2 R 3 In R 1 ~R 3 are independently C1-C6-hydroxyalkyl, (CH2O) n -OH, (CH2CH2O) n -OH, (CH2CH2CH2O) n -OH, (CHOH) n -C(=O)H or (CHOH) n -CHOH, where n is an integer from 1 to 5. More preferably, R 1 ~R 3 are independently C1-C4-hydroxyalkyl, (CH2O) n -OH, (CH2CH2O) n -OH, (CH2CH2CH2O) n -OH, (CHOH) n -C(=O)H or (CHOH) n -CHOH, where n is an integer from 1 to 3. More preferably, R 1 ~R 3 are independently C2-C3-hydroxyalkyl, (CH2O) n -OH, (CH2CH2O) n -OH, (CH2CH2CH2O) n -OH, (CHOH) n -C(=O)H or (CHOH) n -CHOH, where n is an integer from 1 to 3. In a preferred embodiment, NR 1 R 2 R 3 In R 1 ~R 3 are the same. In this regard, each R 1 ~R 3C2-C3-hydroxyalkyl, (CH2O) n -OH, (CH2CH2O) n -OH, (CH2CH2CH2O) n -OH, (CHOH) n -C(=O)H or (CHOH) n -CHOH, where n is an integer from 1 to 3, and in particular, each R 1 ~R 3 is preferably C2-C3-hydroxyalkyl. In a particular embodiment, NR 1 R 2 R 3 is triethanolamine.

[0068] Preferably, the binder composition comprises NR as defined above in an amount of 0.05 to 2.0% by weight, more preferably 0.08 to 1.75% by weight, and in particular 0.1 to 1.5% by weight, based on the total weight of the binder composition. 1 R 2 R 3 Includes.

[0069] Preferably, R 5 -(CHOH) o -R 4 In R 4 and R 5 are independently C1-C6-hydroxyalkyl, C2-C6-hydroxyalkenyl, C1-C6-aminoalkyl, -OH, C1-C5-alkyl, C(=O)H, or C(=O)OH, where o is an integer from 0 to 3. More preferably, R 4 and R 5 are independently C1-C3-hydroxyalkyl, C2-C3-hydroxyalkenyl, C1-C3-aminoalkyl, -OH, C1-C5-alkyl, C(=O)H, or C(=O)OH, where o is an integer from 1 to 2. Even more preferably, R 4 and R 5are independently C1-C2-hydroxyalkyl, C2-C3-hydroxyalkenyl, C1-C2-aminoalkyl, -OH, C1-C5-alkyl, C(=O)H, or C(=O)OH, where o is an integer from 1 to 2. In a preferred embodiment, R 5 -(CHOH) o -R 4 In R 4 and R 5 are the same. In this regard, each R 4 and R 5 is C1-C2-hydroxyalkyl, C2-C3-hydroxyalkenyl, C1-C2-aminoalkyl, -OH, C1-C5-alkyl, C(=O)H or C(=O)OH, where o is an integer from 1 to 2, and in particular each R 4 and R 5 is preferably C1-C2-hydroxyalkyl, where o is an integer from 1 to 2. In a particular embodiment, R 5 -(CHOH) o -R 4 is glycerol.

[0070] Preferably, the binder composition comprises 0.15 to 3.0% by weight, more preferably 0.15 to 2.75% by weight, and especially 0.2 to 2.5% by weight, of R as defined above, based on the total weight of the binder composition. 5 -(CHOH) o -R 4 Includes.

[0071] In a preferred embodiment, the binder composition comprises at least two different polyalcohols (and / or metal salts thereof). Preferably, the polyalcohols (and / or metal salts thereof) are: i) NR 1 R 2 R 3 , where R 1 ~R 3 are independently C1-C6-hydroxyalkyl, (CH2O) n -OH, (CH2CH2O) n -OH, (CH2CH2CH2O) n-OH, (CHOH) n -C(=O)H or (CHOH) n -CHOH, where n is an integer from 1 to 10; and ii) R 5 -(CHOH) o -R 4 , where R 4 and R 5 are independently C1-C6-hydroxyalkyl, C2-C6-hydroxyalkenyl, C1-C6-aminoalkyl, -OH, C1-C5-alkyl, C(=O)H, or C(=O)OH, and o is an integer from 0 to 5.

[0072] In a preferred embodiment, the polyalcohol (and / or metal salt thereof) comprises: i) NR 1 R 2 R 3 , where R 1 ~R 3 is independently C1-C6-hydroxyalkyl; ii) R 5 -(CHOH) o -R 4 , where R 4 and R 5 is independently selected from the group consisting of C1-C6-hydroxyalkyl, o is an integer from 0 to 1, and mixtures thereof, and preferably the polyalcohol (and / or metal salt thereof) is selected from the group consisting of i) NR 1 R 2 R 3 , where R 1 ~R 3 is C-C-hydroxyalkyl, and ii) R 5 -(CHOH) o -R 4 , where R 4 and R 5 are independently C1-C2-hydroxyalkyl and o is an integer from 0 to 1, and in particular said polyalcohol is a mixture of i) triethanolamine and ii) glycerol.

[0073] In a particular embodiment, said metal salt of said polyalcohol is a mixture of i) calcium triethanolamine salt and ii) calcium glycerolate.

[0074] The metal salt of the polyalcohol is preferably a polyvalent metal salt, preferably selected from the group consisting of alkaline earth metals, scandium, titanium, vanadium, chromium, manganese, iron, cobalt, nickel, copper, zinc and aluminium.

[0075] Alkaline earth metals include beryllium, magnesium, calcium, strontium, and barium, hi a preferred embodiment, the alkaline earth metal is calcium.

[0076] Preferably, the binder composition comprises the carbonate in an amount of 0.4 to 4.0 wt %, more preferably 0.5 to 3.0 wt %, based on the total weight of the binder composition.

[0077] In a preferred embodiment, the carbonate has a solubility of more than 0.1 g / l at 20° C., preferably more than 1 g / l at 20° C., more preferably more than 10 g / l at 20° C. and especially more than 50 g / l at 20° C. It is also preferred that the carbonate has a solubility of 0.1 to 500 g / l at 20° C., preferably 1 to 400 g / l at 20° C., more preferably 10 to 300 g / l at 20° C. and especially 50 to 200 g / l at 20° C.

[0078] In a preferred embodiment, the carbonate is an organic carbonate selected from the group consisting of ethylene carbonate, propylene carbonate, glycerin carbonate, and mixtures thereof.

[0079] In a preferred embodiment, the carbonate is an alkali metal carbonate selected from the group consisting of sodium carbonate, sodium bicarbonate, potassium carbonate, potassium bicarbonate, lithium carbonate, lithium bicarbonate, and mixtures thereof, more preferably sodium bicarbonate.

[0080] In another preferred embodiment, the carbonate is selected from the group consisting of ethylene carbonate, propylene carbonate, glycerin carbonate, sodium carbonate, sodium bicarbonate, potassium carbonate, potassium bicarbonate, lithium carbonate, lithium bicarbonate, and mixtures thereof.

[0081] Preferably, the binder composition comprises component F) in an amount of 0.11-3.0 wt. %, more preferably 0.3-2.0 wt. %, based on the total weight of the binder composition.

[0082] As already mentioned above, component F) is selected from the group consisting of compounds of formula (I), polycondensates of said compounds of formula (I), and mixtures thereof, where formula (I) is [ka] wherein: R1 is OH; R2 is H, OH, C1-C6 alkoxy, -SO2X, -SO3X, -OSO3X, -PO, -PO3X2, -OPO3X2, -Z-COOX or -CH(OH)-SO3X; R3 is H, COOX, C3-C6 alkyl or C1-C6 alkoxy optionally substituted by 1-6, preferably 1-5, OH; m is 0 or 1, or When m is 0, R1 and R2 together with the carbon atom to which they are attached form a carbonyl group; R4 is COOY or SO3X, X is H or a cation equivalent, K a wherein K is selected from an alkali metal cation, an alkaline earth metal cation, a zinc cation, an iron cation, an ammonium cation, or a phosphonium cation, and a is 1 / n, where n is the valence of the cation; Y is selected from X, C1-C6 alkyl or phenyl; and Z is CH2 or CH(OH).

[0083] In a preferred embodiment, said component F) comprises a compound of formula (I) in which R2 is SO3X and / or R4 is COOH. In this context, it is further preferred that m is 0.

[0084] In a preferred embodiment, said component F) comprises a hydroxycarboxylic acid or a polycondensate of said hydroxycarboxylic acid or a sulfite addition product of said hydroxycarboxylic acid or of citric acid or of tartaric acid, preferably said hydroxycarboxylic acid or said polycondensate of said hydroxycarboxylic acid or said sulfite addition product of said hydroxycarboxylic acid is glyoxylic acid or a polycondensate of glyoxylic acid or a sulfite addition product of glyoxylic acid, more preferably said polycondensate of glyoxylic acid is an amine-glyoxylic acid condensate, even more preferably said amine-glyoxylic acid condensate is selected from the group consisting of melamine-glyoxylic acid condensates, urea-glyoxylic acid condensates, melamine-urea-glyoxylic acid condensates and polyacrylamide-glyoxylic acid condensates, in particular a urea-glyoxylic acid condensate.

[0085] In a preferred embodiment, the component F) comprises the moiety R2 is H; R3 is a C3-C6 alkyl optionally substituted with 1-5 OH; and R4 is COOY, and Y is X, which is an alkali metal; and preferably, the salt is sodium gluconate.

[0086] In a preferred embodiment, the binder composition comprises at least two components of component F). Preferably, the component F) comprises at least two compounds selected from the group consisting of a compound of formula (I) and a polycondensate of the compound of formula (I), more preferably, the component F) comprises a mixture of a compound of formula (I) and a polycondensate of the compound of formula (I), and even more preferably, the component F) comprises a mixture of a polycondensate of glyoxylic acid and the following moiety: R2 is H; R3 is a C3-C6 alkyl optionally substituted with 1-5 OH; and R4 is COOY, and Y is X, which is an alkali metal; and a salt of formula (I) having the formula:

[0087] In a particular embodiment, the binder composition comprises a polycondensate of glyoxylic acid and sodium gluconate.

[0088] Preferably, the binder composition comprises the dispersant in an amount of 0.02 to 0.9 wt %, more preferably 0.03 to 0.8 wt %, based on the total weight of the binder composition.

[0089] The charge density of the polymer was calculated assuming that all acid groups (sulfonate, phosphate and carboxylate) were fully deprotonated. The charge density ρ is

number

[0090] In a preferred embodiment, the dispersant has a charge density of more than 1.20 μeq / g, preferably more than 1.214 μeq / g up to 14 μeq / g, more preferably from 1.5 to 10.0 μeq / g, and especially from 2.0 to 5.0 μeq / g.

[0091] In a preferred embodiment, the dispersant is a comb polymer comprising units carrying acid functional groups having at least one structural unit of general formula (Ia), (Ib), (Ic) and / or (Id): [ka] During the ceremony, R 1 is H or an unbranched or branched C1-C4 alkyl group, CH2COOH or CH2CO-XR 2 , preferably H or CH3; X is NH-(C n H 2n ), O(C n H 2n ) (wherein n=1, 2, 3 or 4), wherein the nitrogen atom or the oxygen atom is bonded to the CO group or is a chemical bond, preferably X is a chemical bond or O(C n H 2n ) and R 2 is OM, PO3M2, or O-PO3M2, where X is R 2 is a chemical bond when is OM, [ka] During the ceremony, R 3 is H or an unbranched or branched C1-C4 alkyl group, preferably H or CH3; n is 0, 1, 2, 3 or 4, preferably 0 or 1; R 4 is PO3M2 or O-PO3M2, [ka] During the ceremony, R 5 is H or an unbranched or branched C1-C4 alkyl group, preferably H; Z is O or NR 7 , preferably O; R 7is H, (C n H 2n )-OH, (C n H 2n )-PO3M2, (C n H 2n )-OPO3M2, (C6H4)-PO3M2, or (C6H4)-OPO3M2, and n is 1, 2, 3 or 4, preferably 1, 2 or 3; [ka] During the ceremony, R 6 is H or an unbranched or branched C1-C4 alkyl group, preferably H; Q is NR 7 or O, preferably O, R 7 is H, (C n H 2n )-OH, (C n H 2n )-PO3M2, (C n H 2n )-OPO3M2, (C6H4)-PO3M2, or (C6H4)-OPO3M2; n is 1, 2, 3 or 4, preferably 1, 2 or 3, and Each M is independently H or a cation equivalent.

[0092] In a preferred embodiment, the dispersant is a comb polymer comprising units having polyether side chains having at least one structural unit of general formula (IIa), (IIb), (IIc) and / or (IId): [ka] During the ceremony, R 10 , R 11 and R 12 are each independently H or an unbranched or branched C1-C4 alkyl group, Z is O or S; E is an unbranched or branched C1-C6 alkylene group, a cyclohexylene group, CH2-C6H 10 , 1,2-phenylene, 1,3-phenylene or 1,4-phenylene; G is O, NH or CO-NH; or E and G together are a chemical bond, A is C x H 2x where x=2, 3, 4 or 5, preferably 2 or 3; or CH2CH(C6H5), n is 0, 1, 2, 3, 4 or 5, preferably 0, 1 or 2; a is an integer from 2 to 350, preferably from 5 to 150, more preferably from 20 to 135, and most preferably from 60 to 135; R 13 is H, an unbranched or branched C1-C4 alkyl group, CO-NH2 and / or COCH3; [ka] During the ceremony, R 16 , R 17 and R 18 are each independently H or an unbranched or branched C1-C4 alkyl group, E is an unbranched or branched C1-C6 alkylene group, a cyclohexylene group, CH2-C6H 10 , 1,2-phenylene, 1,3-phenylene, or 1,4-phenylene, or a chemical bond; A is C x H 2x where x=2, 3, 4 or 5, preferably 2 or 3; or CH2CH(C6H5), n is 0, 1, 2, 3, 4 and / or 5, preferably 0, 1 or 2; L is for C x H 2x where x=2, 3, 4 or 5, preferably 2 or 3; or CH2-CH(C6H5), a is an integer of 2 to 350, preferably 5 to 150; d is an integer of 1 to 350, preferably 5 to 150; R 19 is H or an unbranched or branched C1-C4 alkyl group, R 20 is H or an unbranched C1-C4 alkyl group; [ka] During the ceremony, R 21 , R 22 and R 23 are each independently H or an unbranched or branched C1-C4 alkyl group, W is O, NR 25 or N, Y is W=O or NR 25 1 if and 2 if W=N; A is C x H 2x where x=2, 3, 4 or 5, preferably 2 or 3; or CH2CH(C6H5), a is an integer from 2 to 350, preferably from 5 to 150, more preferably from 20 to 135, and most preferably from 60 to 135; R 24 is H or an unbranched or branched C1-C4 alkyl group, and R 25 is H or an unbranched or branched C1-C4 alkyl group; [ka] During the ceremony, R 6 is H or an unbranched or branched C1-C4 alkyl group, Q is NR 10 , N or O; Y is W=O or NR 10 1 if and 2 if W=N; R10 is H or an unbranched or branched C1-C4 alkyl group, and A is C x H 2x where x=2, 3, 4 or 5, preferably 2 or 3; or CH2C(C6H5)H; R 24 is H or an unbranched or branched C1-C4 alkyl group, M is H or a cation equivalent, and a is an integer of 2 to 350, preferably 5 to 150, more preferably 20 to 135, and most preferably 60 to 135.

[0093] In a preferred embodiment, the ratio of I to II in the comb polymer is from 1 / 1 to 10 / 1, more preferably from 3 / 1 to 15 / 1.

[0094] In a preferred embodiment, the molecular weight of said comb polymer is between 10 kD and 300 kD, more preferably between 20 kD and 100 kD, as measured by GPC using PEG as the calibration method.

[0095] In a preferred embodiment, the dispersant is a phosphorylated polycondensation product comprising structural units (III) and (IV): [ka] During the ceremony, T is a substituted or unsubstituted phenyl or naphthyl group, or a substituted or unsubstituted heteroaromatic group having 5 to 10 ring atoms, one or two of which are heteroatoms selected from N, O and S; n is 1 or 2; B is N, NH or O with the proviso that n is 2 when B is N, and with the proviso that n is 1 when B is NH or O; A is an unbranched or branched alkylene having 2 to 5 carbon atoms or CH2CH(C6H5); a is an integer from 1 to 300; R 25 is H, branched or unbranched C1-C 10 an alkyl group, a C5-C8 cycloalkyl group, an aryl group, or a heteroaryl group having 5 to 10 ring atoms, one or two of which are heteroatoms selected from N, O, and S; wherein said structural unit (IV) is selected from structural units (IVa) and (IVb): [ka] During the ceremony, D is a substituted or unsubstituted phenyl or naphthyl group, or a substituted or unsubstituted heteroaromatic group having 5 to 10 ring atoms, one or two of which are heteroatoms selected from N, O and S; E is N, NH or O, with the proviso that m is 2 when E is N, and with the proviso that m is 1 when E is NH or O; A is an unbranched or branched alkylene having 2 to 5 carbon atoms or CH2CH(C6H5); b is an integer from 0 to 300; M are each independently H or a cation equivalent; [ka] During the ceremony, V is a substituted or unsubstituted phenyl or naphthyl group, and optionally R 8 , O.H., O.R. 8 , (CO)R 8 , COOM, COOR 8 , SO3R 8 and NO2, R 7 is COOM, OCH2COOM, SO3M or OPO3M2, M is H or a cation equivalent, and R 8is C1-C4 alkyl, phenyl, naphthyl, phenyl-C1-C4 alkyl or C1-C4 alkylphenyl.

[0096] The dispersant comprising the structural units (I) and (II) can be prepared by conventional methods, for example by free radical polymerization.The preparation of the dispersant is described, for example, in EP0894811, EP1851256, EP2463314 and EP0753488.

[0097] In a preferred embodiment, the binder composition further comprises: H) supplementary cementitious material in an amount of 0.5-68.989% by weight, preferably 5-60% by weight, more preferably 10-50% by weight, and especially 15-45% by weight, based on the total weight of the binder composition, preferably said supplementary cementitious material being selected from the group consisting of slag, fly ash, natural pozzolana, calcined clay, silica fume, limestone, and mixtures thereof, preferably limestone. In a particular embodiment, the binder composition comprises said supplementary cementitious material in an amount of 5-65.57% by weight, more preferably 10-61.86% by weight, based on the total weight of the binder composition.

[0098] In a further preferred embodiment, the binder composition further comprises at least two different supplementary cementitious materials, preferably selected from the group consisting of slag, fly ash, natural pozzolana, calcined clay, silica fume, limestone, and mixtures thereof. Preferably, the binder composition further comprises at least two different supplementary cementitious materials selected from the group consisting of slag, calcined clay, limestone. In a particular embodiment, the binder composition further comprises a combination of calcined clay and limestone or a combination of slag and limestone.

[0099] In a further preferred embodiment, the supplementary cementitious material has a Dv90 of less than 200 μm. The Dv90 (by volume) corresponds to the 90th percentile of the particle size distribution, meaning that 90% of the particles have a size equal to or less than the Dv90 and 10% have a size greater than the Dv90. In general, the Dv90 and other values ​​of the same type are characteristic of the granulometric profile (volume distribution) of a particle or collection of granules. Compliance with the requirement that 90% of the particles have a size equal to or less than 200 μm is ensured when at least 90% by volume of the particles pass through a sieve with openings of 200 μm.

[0100] Alternatively, the Dv90 can be calculated from particle size distribution measured by static laser diffraction using a Malvern Mastersizer 2000.

[0101] In a preferred embodiment of the invention, said Portland cement clinker and said calcium sulfate are present in a weight ratio of 60:1 to 2:1, preferably 50:1 to 3:1, more preferably 40:1 to 4:1, or 20:1 to 3:1, or 10:1 to 4:1.

[0102] In a preferred embodiment of the invention, said Portland cement clinker and said inorganic sulfate source having a solubility higher than 100 g / l at 20° C. are present in a weight ratio of 60:1 to 2:1, preferably 50:1 to 3:1, more preferably 40:1 to 4:1, or 40:1 to 5:1, or 30:1 to 10:1.

[0103] In a preferred embodiment, the Portland cement clinker and the auxiliary cementitious material are present in a weight ratio of 2:1 to 1:5, preferably 2:1 to 1:2, more preferably 1.8:1 to 1:1.8 or 1.8:1 to 1:1.5, or 1.5:1 to 1:1.

[0104] In a preferred embodiment, the Portland cement clinker and the polyalcohol (and / or its metal salt) are present in a weight ratio of from 500:1 to 10:1, preferably from 300:1 to 50:1, more preferably from 180:1 to 80:1.

[0105] In a preferred embodiment, said Portland cement clinker and said carbonate are present in a weight ratio of from 400:1 to 10:1, preferably from 300:1 to 40:1, more preferably from 150:1 to 60:1.

[0106] In a preferred embodiment, said Portland cement clinker and said component F) are present in a weight ratio of from 500:1 to 10:1, preferably from 300:1 to 50:1, more preferably from 200:1 to 100:1.

[0107] In a preferred embodiment, said Portland cement clinker and said dispersant are present in a weight ratio of from 2500:1 to 1000:1, preferably from 2000:1 to 1100:1, more preferably from 1800:1 to 1200:1.

[0108] In a preferred embodiment of the present invention, the binder composition as defined above is mixed with at least one aggregate to provide a construction material composition comprising the binder composition and at least one aggregate. Suitable aggregates are, for example, sands, such as standard sand and quartz sand.

[0109] As outlined above, the present invention relates in a second aspect to the use of a retarding admixture (RM), which comprises, based on the total weight of said retarding admixture (RM), RM1) a carbonate selected from the group consisting of organic carbonates, alkali metal carbonates, and mixtures thereof, in an amount of 30-60% by weight; RM2) NR in an amount of 5-20% by weight 1 R 2 R 3 and / or a metal salt thereof, where R 1 ~R 3are independently C1-C6-hydroxyalkyl; RM3) 10 to 30% by weight of R 5 -(CHOH) o -R 4 and / or a metal salt thereof, where R 4 and R 5 is independently C1-C6-hydroxyalkyl, where o is an integer from 0 to 1; RM4) a component RM4) selected from the group consisting of the compounds of formula (I), polycondensates of the compounds of formula (I) and mixtures thereof, in an amount of 12 to 50% by weight, where formula (I) is [ka] wherein: R1 is OH; R2 is H, OH, C1-C6 alkoxy, -SO2X, -SO3X, -OSO3X, -PO, -PO3X2, -OPO3X2, -Z-COOX or -CH(OH)-SO3X; R3 is H, COOX, C3-C6 alkyl or C1-C6 alkoxy optionally substituted by 1-6, preferably 1-5, OH; m is 0 or 1, or When m is 0, R1 and R2 together with the carbon atom to which they are attached form a carbonyl group; R4 is COOY or SO3X, X is H or a cation equivalent, K a wherein K is selected from an alkali metal cation, an alkaline earth metal cation, a zinc cation, an iron cation, an ammonium cation, or a phosphonium cation, and a is 1 / n, and n is the valence of the cation; Y is selected from X, C1-C6 alkyl or phenyl; and Z is CH2 or CH(OH); and a dispersant having a charge density greater than 0.80 μeq / g; The present invention relates to said use for improving the spreading and / or compressive strength of a construction material composition comprising Portland cement clinker, calcium sulfate, sodium sulfate and optionally ancillary cementitious materials.

[0110] In a preferred embodiment, the present invention relates to the use of a retarding admixture (RM) comprising, based on the total weight of said retarding admixture (RM), RM1) a carbonate selected from the group consisting of organic carbonates, alkali metal carbonates, and mixtures thereof, in an amount of 30-60% by weight; RM2) NR in an amount of 5-20% by weight 1 R 2 R 3 , where R 1 ~R 3 are independently C1-C6-hydroxyalkyl; RM3) 10 to 30% by weight of R 5 -(CHOH) o -R 4 , where R 4 and R 5 is independently C1-C6-hydroxyalkyl, and o is an integer of 0 to 1; RM4) a component RM4) selected from the group consisting of the compounds of formula (I), polycondensates of the compounds of formula (I) and mixtures thereof, in an amount of 12 to 50% by weight, where formula (I) is [ka] where: R1 is OH; R2 is H, OH, C1-C6 alkoxy, -SO2X, -SO3X, -OSO3X, -PO, -PO3X2, -OPO3X2, -Z-COOX or -CH(OH)-SO3X; R3 is H, COOX, C3-C6 alkyl or C1-C6 alkoxy optionally substituted by 1-6, preferably 1-5, OH; m is 0 or 1, or When m is 0, R1 and R2 together with the carbon atom to which they are attached form a carbonyl group; R4 is COOY or SO3X, X is H or a cation equivalent, K a wherein K is selected from an alkali metal cation, an alkaline earth metal cation, a zinc cation, an iron cation, an ammonium cation, or a phosphonium cation, and a is 1 / n, where n is the valence of the cation; Y is selected from X, C1-C6 alkyl or phenyl; and Z is CH2 or CH(OH); and a dispersant having a charge density greater than 0.80 μeq / g; The present invention relates to said use for improving the spreadability and / or the compressive strength of a construction material composition comprising Portland cement clinker, calcium sulfate, sodium sulfate and optionally auxiliary cementitious materials.

[0111] The above NR 1 R 2 R 3 and the above R 5 -(CHOH) o -R 4 The metal salts of are independently preferably polyvalent metal salts selected from the group consisting of alkaline earth metals, scandium, titanium, vanadium, chromium, manganese, iron, cobalt, nickel, copper, zinc and aluminum.

[0112] Alkaline earth metals include beryllium, magnesium, calcium, strontium, and barium, hi a preferred embodiment, the alkaline earth metal is calcium.

[0113] It is to be understood that the spreading is improved if the spreading of the construction material composition is increased after the addition of RM and the dispersant compared to the spreading of the construction material composition without one of the specific components, said spreading being preferably determined according to EN 1015-3.

[0114] Furthermore, it should be understood that the compressive strength is improved if the compressive strength of the construction material composition is increased after the addition of RM and the dispersant compared to the compressive strength of the construction material composition without one of the specific components, the compressive strength being preferably determined according to DIN EN 1015-11.

[0115] In a preferred embodiment, said spreading and said compressive strength are improved.

[0116] In a preferred embodiment, said retarder admixture (RM) comprises carbonate RM1) in an amount of 35-50% by weight, more preferably 38-45% by weight, based on the total weight of said retarder admixture (RM).

[0117] In a preferred embodiment, the retarder (RM) comprises NR in an amount of 6 to 15 wt. %, more preferably 8 to 13 wt. %, based on the total weight of the retarder (RM). 1 R 2 R 3 and / or its metal salt RM2). In a preferred embodiment, NR 1 R 2 R 3 and / or its metal salt RM2), 1 ~R 3 are independently C1-C5-hydroxyalkyl, preferably C1-C4-hydroxyalkyl, more preferably C2-C4-hydroxyalkyl, and in particular C2-C3-hydroxyalkyl. Preferably R 1 ~R 3 are the same. In particular embodiments, NR 1 R 2 R 3 and / or its metal salt RM2) is triethanolamine. In another particular embodiment, NR 1 R 2 R 3 and / or its metal salt RM2) is the calcium salt of triethanolamine.

[0118] In a preferred embodiment, the retarding admixture (RM) comprises R in an amount of 15 to 26 wt. %, more preferably 18 to 24 wt. %, based on the total weight of the retarding admixture (RM). 5 -(CHOH) o -R 4 and / or its metal salt RM3). In a preferred embodiment, R 5 -(CHOH) o -R 4 and / or its metal salt RM3), R 4 and R 5 is independently C1-C5-hydroxyalkyl, preferably C1-C4-hydroxyalkyl, more preferably C1-C3-hydroxyalkyl, and especially C1-C2-hydroxyalkyl, where o is an integer from 0 to 1. In a particular embodiment, R 5 -(CHOH) o -R 4 and / or its metal salt RM5) is glycerol. 5 -(CHOH) o -R 4 and / or its metal salt is calcium glycerolate.

[0119] In particular embodiments, RM2) is a triethanolamine calcium salt and RM3) is calcium glycerolate.

[0120] In a preferred embodiment, said retarder admixture (RM) comprises component RM4) in an amount of 18-45 wt.-%, more preferably 20-35 wt.-%, based on the total weight of said retarder admixture (RM).

[0121] In a preferred embodiment, the retarding admixture (RM) comprises a mixture of glycerol and triethanolamine in a ratio of 1 / 1 to 9 / 1.

[0122] Preferred embodiments of component RM4) correspond to the above-mentioned preferred embodiments of component F) as outlined above.

[0123] Preferably, component RM4) comprises a compound of formula (I) in which R2 is SO3X and / or R4 is COOH. In this context, it is further preferred that m is 0.

[0124] In a preferred embodiment, said component RM4) comprises a hydroxycarboxylic acid or a polycondensate of said hydroxycarboxylic acid or a sulfite addition product of said hydroxycarboxylic acid or of citric acid or of tartaric acid, preferably said hydroxycarboxylic acid or said polycondensate of said hydroxycarboxylic acid or said sulfite addition product of said hydroxycarboxylic acid is glyoxylic acid or a polycondensate of glyoxylic acid or a sulfite addition product of glyoxylic acid, more preferably said polycondensate of glyoxylic acid is an amine-glyoxylic acid condensate, even more preferably said amine-glyoxylic acid condensate is selected from the group consisting of melamine-glyoxylic acid condensates, urea-glyoxylic acid condensates, melamine-urea-glyoxylic acid condensates and polyacrylamide-glyoxylic acid condensates, in particular a urea-glyoxylic acid condensate.

[0125] In a preferred embodiment, the component RM4) comprises the moiety R2 is H; R3 is a C3-C6 alkyl optionally substituted with 1-5 OH; and R4 is COOY, and Y is X, which is an alkali metal; and preferably, the salt is sodium gluconate.

[0126] In a preferred embodiment, said retarding admixture (RM) comprises at least two components of component RM4). Preferably, said component RM4) comprises at least two compounds selected from the group consisting of a compound of formula (I) and a polycondensate of said compound of formula (I), more preferably, component RM4) comprises a mixture of a compound of formula (I) and a polycondensate of said compound of formula (I), even more preferably, said component RM4) comprises a mixture of a polycondensate of glyoxylic acid and the following moieties: R2 is H; R3 is a C3-C6 alkyl optionally substituted with 1-5 OH; and R4 is COOY, and Y is X, which is an alkali metal and preferably, the salt is sodium gluconate.

[0127] In a particular embodiment, the retarding admixture (RM) comprises a polycondensate of glyoxylic acid and sodium gluconate.

[0128] Preferably, said retardant admixture (RM) comprises the polycondensate of said compound of formula (I) in an amount of 12 to 50% by weight, more preferably 15 to 35% by weight, and especially 17 to 30% by weight, based on the total weight of said retardant admixture (RM).

[0129] Preferably, the retarder admixture (RM) comprises the salt of the compound of formula (I) in an amount of 3 to 20% by weight, more preferably 4 to 15% by weight, and especially 5 to 10% by weight, based on the total weight of the retarder admixture (RM).

[0130] Preferably, the construction material composition comprises a binder composition and at least one aggregate, such as sand, wherein the binder composition comprises the retarding admixture (RM), the dispersant, and Portland cement clinker.

[0131] In a preferred embodiment, the retarding admixture (RM) is present in the binder composition in an amount of 0.5 to 7.0% by weight, preferably 0.6 to 5.0% by weight, more preferably 0.8 to 4.0% by weight, and in particular 1.0 to 3.0% by weight, based on the total weight of the binder composition.

[0132] In a preferred embodiment, the dispersant is contained in the binder composition in an amount of 0.01-1 wt.%, 0.01-0.95 wt.%, preferably 0.02-0.9 wt.%, more preferably 0.02-0.85 wt.%, and in particular 0.03-0.8 wt.%, based on the total weight of the binder composition. With regard to further preferred embodiments of the dispersant, the same preferred embodiments as in the first aspect above apply.

[0133] In a preferred embodiment, the binder composition further comprises at least one, preferably at least two, auxiliary cementitious materials.

[0134] With regard to further preferred embodiments of said carbonate, binder composition, Portland cement clinker, calcium sulfate, sodium sulfate and optionally auxiliary cementitious materials, the same preferred embodiments as for the first aspect above apply.

[0135] As outlined above, the present invention relates in a third aspect to a concrete comprising a binder composition as outlined in said first aspect. With regard to further preferred embodiments of said binder composition, therefore, the same preferred embodiments as in said first aspect apply.

[0136] As outlined above, the present invention relates in a fourth aspect to the use of a retarder admixture (RM), comprising, based on the total weight of said retarder admixture (RM), RM1) a carbonate selected from the group consisting of organic carbonates, alkali metal carbonates, and mixtures thereof, in an amount of 30-60% by weight; RM2) NR in an amount of 5-20% by weight 1 R2 R 3 and / or a metal salt thereof, where R 1 ~R 3 are independently C1-C6-hydroxyalkyl; RM3) 10 to 30% by weight of R 5 -(CHOH) o -R 4 and / or a metal salt thereof, where R 4 and R 5 is independently C1-C6-hydroxyalkyl, and o is an integer of 0 to 1; RM4) a component RM4) selected from the group consisting of the compounds of formula (I), polycondensates of the compounds of formula (I) and mixtures thereof, in an amount of 12 to 50% by weight, where formula (I) is [ka] wherein: R1 is OH; R2 is H, OH, C1-C6 alkoxy, -SO2X, -SO3X, -OSO3X, -PO, -PO3X2, -OPO3X2, -Z-COOX or -CH(OH)-SO3X; R3 is H, COOX, C3-C6 alkyl or C1-C6 alkoxy optionally substituted by 1-6, preferably 1-5, OH; m is 0 or 1, or When m is 0, R1 and R2 together with the carbon atom to which they are attached form a carbonyl group; R4 is COOY or SO3X, X is H or a cation equivalent, K a wherein K is selected from an alkali metal cation, an alkaline earth metal cation, a zinc cation, an iron cation, an ammonium cation, or a phosphonium cation, and a is 1 / n, where n is the valence of the cation; Y is selected from X, C1-C6 alkyl or phenyl; and Z is CH2 or CH(OH); and a dispersant having a charge density of more than 0.80 μeq / g, said use being for retarding the hardening of building material formulations containing inorganic binders and / or for producing building products.

[0137] In a preferred embodiment, the present invention relates to the use of a retarding admixture (RM), which comprises, based on the total weight of said retarding admixture (RM), RM1) a carbonate selected from the group consisting of organic carbonates, alkali metal carbonates, and mixtures thereof, in an amount of 30-60% by weight; RM2) NR in an amount of 5-20% by weight 1 R 2 R 3 , where R 1 ~R 3 are independently C1-C6-hydroxyalkyl; RM3) 10 to 30% by weight of R 5 -(CHOH) o -R 4 , where R 4 and R 5 is independently C1-C6-hydroxyalkyl, and o is an integer of 0 to 1; RM4) a component RM4) selected from the group consisting of the compounds of formula (I), polycondensates of the compounds of formula (I) and mixtures thereof, in an amount of 12 to 50% by weight, where formula (I) is [ka] wherein: R1 is OH; R2 is H, OH, C1-C6 alkoxy, -SO2X, -SO3X, -OSO3X, -PO, -PO3X2, -OPO3X2, -Z-COOX or -CH(OH)-SO3X; R3 is H, COOX, C3-C6 alkyl or C1-C6 alkoxy optionally substituted by 1-6, preferably 1-5, OH; m is 0 or 1, or When m is 0, R1 and R2 together with the carbon atom to which they are attached form a carbonyl group; R4 is COOY or SO3X, X is H or a cation equivalent, K a wherein K is selected from an alkali metal cation, an alkaline earth metal cation, a zinc cation, an iron cation, an ammonium cation, or a phosphonium cation, and a is 1 / n, where n is the valence of the cation; Y is selected from X, C1-C6 alkyl or phenyl; and Z is CH2 or CH(OH); and a dispersant having a charge density greater than 0.80 μeq / g; Said use for retarding the hardening of building material formulations containing inorganic binders and / or for producing building products.

[0138] Preferably, the inorganic binder is a hydraulic binder, a latent hydraulic binder, a calcium sulfate based inorganic binder, or a mixture thereof. In a preferred embodiment, the inorganic binder is a hydraulic binder selected from portland cement, calcium aluminate cement, sulfoaluminate cement, and mixtures thereof. In another preferred embodiment, the inorganic binder comprises a mixture of portland cement and aluminate cement, or a mixture of portland cement and sulfoaluminate cement, or a mixture of portland cement, aluminate cement and sulfoaluminate cement. In another preferred embodiment, the inorganic binder is a calcium sulfate based binder selected from calcium sulfate dihydrate, calcium sulfate hemihydrate, anhydrite, and mixtures thereof. In yet another preferred embodiment, the inorganic binder is a calcium sulfate based binder in its anhydrous form.

[0139] In another preferred embodiment, said inorganic binder may be used in a mortar composition.

[0140] The mortar composition may additionally comprise at least one aggregate.

[0141] The term "aggregate" is understood to relate to filler materials, i.e. inert materials that do not essentially form hydration products. The aggregates may be selected from quartz, sand, marble, e.g. crushed marble, glass spheres, granite, basalt, limestone, sandstone, calcite, marble, serpentine, travertine, dolomite, feldspar, gneiss, alluvial sand, and mixtures thereof. The packing density of the aggregates should be as high as possible, and their particle size distribution ideally constitutes a Fuller type sieve curve.

[0142] Aggregates may be classified by particle size. Fine aggregates, e.g. sand, generally have a diameter distribution between 150 μm and 5 mm. Coarse aggregates generally have a diameter distribution above 5 mm.

[0143] The present invention also relates to a mixed mortar composition comprising the inorganic binder composition according to the present invention, aggregate and water. Preferably, the ratio of water to Portland cement clinker is 0.2-1.5, preferably 0.3-1, more preferably 0.3-0.7 and most preferably 0.3-0.5.

[0144] The mixed mortar composition may comprise concrete or grout. The term "mortar" or "grout" refers to a cement paste to which fine aggregates, i.e. aggregates with a diameter between 150 μm and 5 mm (e.g. sand), and optionally very fine aggregates, are added. Grout is a mixture of sufficiently low viscosity for filling in voids or gaps. The mortar viscosity is high enough to support not only the mortar's own weight but also the weight of the masonry placed on it. The term "concrete" refers to a mortar to which coarse aggregates, i.e. aggregates with a diameter greater than 5 mm, are added.

[0145] In a preferred embodiment, the Portland cement clinker is mixed with 1 ml of freshly mixed mortar composition.3 More preferably, the amount is present in an amount of 180 to 900 kg per unit area, more preferably 180 to 600 kg per unit area.

[0146] With regard to further preferred embodiments of said components of said retarding admixture (RM) and said dispersing agent, the same preferred embodiments as in the second aspect apply.

[0147] Suitable building products are, for example, concrete, e.g. on-site concrete, finished concrete parts, precast concrete parts, concrete goods, cast concrete stone, concrete bricks, sprayed concrete (shotcrete), ready-mix concrete, air-placed concrete, 3D printed concrete or mortar, concrete repair systems, industrial cement flooring, one-component and two-component sealing slurries, screeds, filling compositions, and self-levelling compositions, e.g. joint sealants or self-levelling primers, adhesives, e.g. building or structural adhesives, adhesives for thermal insulation composite systems, or tiles. It may be an adhesive, a plaster, a sealant, a coating and a paint system, in particular for tunnels, for waste water drains, for splash protection and for condensate lines, a screed, a mortar, such as a dry mortar, a sag-resistant mortar, a flowable mortar or a self-levelling mortar, a drainage mortar or a repair mortar, a grout, such as a joint grout, a non-shrink grout, a tile grout, a windmill grout, an anchor grout, a flowable grout or a self-levelling grout, an ETICS (External Insulation Composite System), an EIFS grout (External Insulation Exterior Finish System), an expansive explosive, a waterproofing membrane, a cementitious foam or a gypsum wallboard. EXAMPLES

[0148] The invention was tested in a mortar using the following recipe: Cement CEM I 52.5 N 438.3g Supplementary cementitious material (limestone powder) 394.5g CaSO4 (anhydrous) 44g Standard sand 1350g Silica sand (0.1~0.3mm) 568g 368g water Sodium sulfate (anhydrous) 21.9 g.

[0149] The CEM I 52.5 N used had the following composition: [Table 1]

[0150] The cement mortar was produced in a mortar mixer with a batch volume of 5 L according to EN 196-1:2005. The inorganic binder, the additives (if used) and water were placed in a mixing vessel and mixing was started with the mixer at 140 rpm. After 30 seconds of mixing the standard sand was slowly added for 30 seconds. After the addition of the standard sand was completed, the mixer speed was set to 285 rpm and mixing was continued for another 30 seconds. After that step the mixing was stopped for 90 seconds. Within the first 30 seconds of this interruption in mixing the mortar adhering to the vessel wall was removed and added back to the mortar. After an interruption of 90 s the mixing was continued with a mixer speed of 285 rpm. The total mixing time was 4 minutes. The spread of the mortar was determined immediately after the end of mixing according to EN 1015-3 (value at 4 minutes). The compressive strength is preferably determined according to DIN EN 1015-11.

[0151] Retardant additive formulation A with 2.5 wt.% cement: Retarder 1 20% NaHCO3 41% Sodium Gluconate 7% Glycerol 21% TEA 11%.

[0152] Retarder 1 was synthesized according to WO2019 / 077050A1: Synthesis Procedure A, Retarder 7 in Table 1, pages 24-26.

[0153] Several dispersants were used to enhance flowability: Dispersant 1 is polymerized using ethoxylated hydroxybutyl vinyl ether (ethylene oxide 68) and acrylic acid in a 1 / 10 ratio. The charge density is 2.68 μeq / g. Dispersant 2 is polymerized using ethoxylated hydroxybutyl vinyl ether (ethylene oxide 68) and acrylic acid in a 1 / 3 ratio. The charge density is 0.93 μeq / g. Dispersant 3 is polymerized with ethoxylated hydroxybutyl vinyl ether (ethylene oxide 68) and acrylic acid in a 1 / 1 ratio. The charge density is 0.32 μeq / g.

[0154] Experiment 1 (different dispersants): Table 1: Mortar formulations tested, focusing on the use of different dispersants [Table 2]

[0155] This experiment shows that the charge density of the dispersant is crucial for acceptance of flowable mortar.

[0156] Experiment 2 (Removal of components of Formulation A): The following mortar mix was used: Cement 438.3g Limestone powder 394.5g CaSO4 (anhydrous) 44g Standard sand 1350g Silica sand (0.1~0.3mm) 568g 368g water Dispersant 1 0.3g Sodium sulfate 21.9g.

[0157] Table 2: Mortar formulations tested, highlighting omissions of certain ingredients [Table 3]

[0158] Experiment 3 (removal of sodium sulfate): The following mortar mix was used: Cement 438.3g Limestone powder 394.5g CaSO4 (anhydrous) 44g Standard sand 1350g Silica sand (0.1~0.3mm) 568g 368g water Dispersant 1 0.3g Formulation A 11g.

[0159] Table 3: Mortar formulations tested, focusing on omission of sodium sulfate [Table 4]

[0160] Experiment 4 (supplementary cementitious materials): In this experiment, the effectiveness of the present invention was also tested with calcined clay as a supplementary cementitious material.

[0161] The following mortar mix was used: Cement 438.3g Supplementary Powder 394.5g CaSO4 44g Standard sand 1350g Silica sand (0.1~0.3mm) 568g 368g of water.

[0162] Table 4: Mortar formulations tested, focusing on different auxiliary cementitious materials [Table 5]

Claims

1. A binder composition comprising, based on the total weight of the binder composition, A) Portland cement clinker in an amount of 25 to 94.089 wt. %; B) calcium sulfate xH in an amount of 5 to 20% by weight ２ O, where x is selected from 0 to 2; C) an inorganic sulfate source having a solubility of more than 100 g / l at 20° C. in an amount of 0.3 to 10% by weight; D) a polyalcohol and / or a metal salt thereof in an amount of 0.2 to 5% by weight, E) a carbonate selected from the group consisting of organic carbonates, alkali metal carbonates, and mixtures thereof, in an amount of 0.3 to 5 wt. %; F) an amount of 0.101 to 3.5% by weight of a component F) selected from the group consisting of compounds of formula (I), polycondensates of said compounds of formula (I), and mixtures thereof, wherein formula (I) is 【Chemical 1】 wherein: R1 is OH, R2 is H, OH, C １ ~C ６ Alkoxy, —SO ２ X, -SO ３ X, -OSO ３ X, -PO, -PO ３ X ２ , -OPO ３ X ２ , -Z-COOX or -CH(OH)-SO ３ X, R3 is H, COOX, C optionally substituted by 1 to 6 OH ３ ~C ６ Alkyl or C １ ~C ６ is an alkoxy, m is 0 or 1, or when m is 0, R1 and R2 together with the carbon atom to which they are attached form a carbonyl group; R4 is COOY or SO ３ X, X is H or a cation equivalent K ａ wherein K is selected from an alkali metal cation, an alkaline earth metal cation, a zinc cation, an iron cation, an ammonium cation, or a phosphonium cation, and a is 1 / n, where n is the valence of the cation; Y is X, C １ ~C ６ alkyl or phenyl, and Z is CH ２ or CH(OH), and G) a dispersant having a charge density greater than 0.80 μeq / g in an amount of 0.01 to 1 wt. % The binder composition comprising:

2. The polyalcohol and / or metal salt thereof is selected from the group consisting of i) NR １ R ２ R ３ , where R １ ~R ３ is independently C １ ~C ６ -hydroxyalkyl, (CH ２ O) ｎ -OH, (CH ２ CH ２ O) ｎ -OH, (CH ２ CH ２ CH ２ O) ｎ -OH, (CHOH) ｎ -C(=O)H, or (CHOH) ｎ -CH ２ OH, where n is an integer from 1 to 10; ii) R ５ -(CHOH) ｏ -R ４ , where R ４ and R ５ is independently C １ ~C ６ -hydroxyalkyl, C ２ ~C ６ -hydroxyalkenyl, C １ ~C ６ -aminoalkyl, -OH, C １ ~C ５ -alkyl, C(=O)H, or C(=O)OH, where o is an integer from 0 to 5, and mixtures thereof, and preferably, the polyalcohol and / or metal salt thereof is selected from the group consisting of i) NR １ R ２ R ３ and ii) R ５ -(CHOH) ｏ -R ４ The binder composition of claim 1 , wherein the binder composition is a mixture of

3. The polyalcohol and / or metal salt thereof is selected from the group consisting of i) NR １ R ２ R ３ , where R １ ~R ３ is independently C １ ~C ６ -hydroxyalkyl; ii) R ５ -(CHOH) ｏ -R ４ , where R ４ and R ５ is independently C １ ~C ６ -hydroxyalkyl, o is an integer from 0 to 1, and mixtures thereof, and preferably the polyalcohol and / or metal salt thereof is selected from the group consisting of i) NR １ R ２ R ３ , where R １ ~R ３ is C ２ ~C ３ -hydroxyalkyl, and ii) R ５ -(CHOH) ｏ -R ４ , where R ４ and R ５ is independently C １ ~C ２ -hydroxyalkyl, and o is an integer from 0 to 1, in particular the polyalcohol and / or metal salt thereof is a mixture of i) triethanolamine and ii) glycerol or a mixture of i) triethanolamine calcium salt and ii) calcium glycerolate.

4. 2. The binder composition of claim 1, wherein the carbonate is an alkali metal carbonate selected from the group consisting of sodium carbonate, sodium bicarbonate, potassium carbonate, potassium bicarbonate, lithium carbonate, lithium bicarbonate, and mixtures thereof, preferably sodium bicarbonate.

5. the inorganic sulfate source is an alkali metal sulfate selected from the group consisting of potassium sulfate, sodium sulfate, lithium sulfate, and mixtures thereof, preferably sodium sulfate; and / or The binder composition of claim 1 , wherein the calcium sulfate is calcium sulfate anhydrous.

6. 2. The binder composition of claim 1, wherein the dispersant has a charge density of more than 1.20 μeq / g, preferably more than 1.2 μeq / g up to 14 μeq / g, more preferably from 1.5 to 10.0 μeq / g, and especially from 2.0 to 5.0 μeq / g.

7. The dispersant is a comb polymer comprising units having acid functionality having at least one structural unit of general formula (Ia), (Ib), (Ic) and / or (Id): 【Chemistry 2】 During the ceremony, R １ is H or unbranched or branched C １ ~C ４ Alkyl group, CH ２ COOH or CH ２ CO-X-R ２ , preferably H or CH ３ and X is NH-(C ｎ H ２ｎ ), O(C ｎ H ２ｎ ) [wherein n=1, 2, 3 or 4], wherein the nitrogen atom or the oxygen atom is bonded to the CO group or is a chemical bond, preferably X is a chemical bond or O(C ｎ H ２ｎ ) and R ２ ,OM,PO ３ M ２ , or O-PO ３ M ２ where X is R ２ is a chemical bond when 【Chemistry 3】 During the ceremony, R ３ is H or unbranched or branched C １ ~C ４ an alkyl group, preferably H or CH ３ and n is 0, 1, 2, 3 or 4, preferably 0 or 1; R ４ , PO ３ M ２ , or O-PO ３ M ２ That is, 【Chemistry 4】 During the ceremony, R ５ is H or unbranched or branched C １ ~C ４ an alkyl group, preferably H; Z is O or NR ７ , preferably O; R ７ is H, (C ｎ H ２ｎ ) —OH, (C ｎ H ２ｎ )-PO ３ M ２ , (C ｎ H ２ｎ )-OPO ３ M ２ , (C ６ H ４ )-PO ３ M ２ , or (C ６ H ４ )-OPO ３ M ２ and n is 1, 2, 3 or 4, preferably 1, 2 or 3; 【Chemistry 5】 During the ceremony, R ６ is H or unbranched or branched C １ ~C ４ an alkyl group, preferably H; Q is NR ７ or O, preferably O, R ７ is H, (C ｎ H ２ｎ ) —OH, (C ｎ H ２ｎ )-PO ３ M ２ , (C ｎ H ２ｎ )-OPO ３ M ２ , (C ６ H ４ )-PO ３ M ２ , or (C ６ H ４ )-OPO ３ M ２ and n is 1, 2, 3 or 4, preferably 1, 2 or 3, and Each M is independently H or a cation equivalent; and / or wherein the dispersant is a comb polymer comprising units having polyether side chains with at least one structural unit of general formula (IIa), (IIb), (IIc) and / or (IId): 【Chemistry 6】 During the ceremony, R １０ , R １１ and R １２ are each independently H or unbranched or branched C １ ~C ４ is an alkyl group, Z is O or S; E is unbranched or branched C １ ~C ６ Alkylene group, cyclohexylene group, CH ２ -C ６ H １０ , 1,2-phenylene, 1,3-phenylene or 1,4-phenylene; G is O, NH or CO-NH; or E and G together are a chemical bond, A is C ｘ H ２ｘ where x=2, 3, 4 or 5, preferably 2 or 3, or CH ２ CH(C ６ H ５ ) and n is 0, 1, 2, 3, 4 or 5, preferably 0, 1 or 2; a is an integer from 2 to 350, preferably from 5 to 150, more preferably from 20 to 135, and most preferably from 60 to 135; R １３ is H, unbranched or branched C １ ~C ４ Alkyl group, CO—NH ２ and / or COCH ３ and 【Chemistry 7】 During the ceremony, R １６ , R １７ and R １８ are each independently H or unbranched or branched C １ ~C ４ is an alkyl group, E is unbranched or branched C １ ~C ６ Alkylene group, cyclohexylene group, CH ２ -C ６ H １０ , 1,2-phenylene, 1,3-phenylene, or 1,4-phenylene, or a chemical bond; A is C ｘ H ２ｘ where x=2, 3, 4 or 5, preferably 2 or 3, or CH ２ CH(C ６ H ５ ) and n is 0, 1, 2, 3, 4 and / or 5, preferably 0, 1 or 2; L is C ｘ H ２ｘ where x=2, 3, 4 or 5, preferably 2 or 3, or CH ２ -CH(C ６ H ５ ) and a is an integer of 2 to 350, preferably 5 to 150; d is an integer of 1 to 350, preferably 5 to 150; R １９ is H or unbranched or branched C １ ~C ４ is an alkyl group, R ２０ is H or unbranched C １ ~C ４ is an alkyl group, 【Chemistry 8】 During the ceremony, R ２１ , R ２２ and R ２３ are each independently H or unbranched or branched C １ ~C ４ is an alkyl group, W is O, NR ２５ or N, Y is W=O or NR ２５ and 2 if W=N; A is C ｘ H ２ｘ where x=2, 3, 4 or 5, preferably 2 or 3, or CH ２ CH(C ６ H ５ ) and a is an integer from 2 to 350, preferably from 5 to 150, more preferably from 20 to 135, and most preferably from 60 to 135; R ２４ is H or unbranched or branched C １ ~C ４ is an alkyl group, and R ２５ is H or unbranched or branched C １ ~C ４ is an alkyl group, 【Chemistry 9】 During the ceremony, R ６ is H or unbranched or branched C １ ~C ４ is an alkyl group, Q is NR １０ , N or O; Y is W=O or NR １０ and 2 if W=N; R １０ is H or unbranched or branched C １ ~C ４ is an alkyl group, and A is C ｘ H ２ｘ where x=2, 3, 4 or 5, preferably 2 or 3, or CH ２ C (C ６ H ５ ) H, R ２４ is H or unbranched or branched C １ ~C ４ is an alkyl group, M is H or a cation equivalent, and 2. The binder composition of claim 1, wherein a is an integer from 2 to 350, preferably from 5 to 150, more preferably from 20 to 135, and most preferably from 60 to 135.

8. The dispersant is a phosphorylated polycondensation product comprising structural units (III) and (IV): 【Chemistry 10】 During the ceremony, T is a substituted or unsubstituted phenyl or naphthyl group, or a substituted or unsubstituted heteroaromatic group having 5 to 10 ring atoms, one or two of which are heteroatoms selected from N, O and S; n is 1 or 2; B is N, NH or O with the proviso that n is 2 when B is N, and n is 1 when B is NH or O; A is an unbranched or branched alkylene having 2 to 5 carbon atoms or CH ２ CH(C ６ H ５ ) and a is an integer from 1 to 300, R ２５ is H, branched or unbranched C １ ~C １０ Alkyl group, C ５ ~C ８ a cycloalkyl group, an aryl group, or a heteroaryl group having 5 to 10 ring atoms, one or two of which are heteroatoms selected from N, O, and S; wherein the structural unit (IV) is selected from structural units (IVa) and (IVb): 【Chemistry 11】 During the ceremony, D is a substituted or unsubstituted phenyl or naphthyl group, or a substituted or unsubstituted heteroaromatic group having 5 to 10 ring atoms, one or two of which are heteroatoms selected from N, O and S; E is N, NH, or O, with the proviso that m is 2 when E is N, and m is 1 when E is NH or O; A is an unbranched or branched alkylene having 2 to 5 carbon atoms or CH ２ CH(C ６ H ５ ) and b is an integer from 0 to 300; M are independently H or a cation equivalent; 【Chemistry 12】 During the ceremony, V is a substituted or unsubstituted phenyl or naphthyl group, and optionally R ８ , OH, OR ８ , (CO)R ８ , COOM, COOR ８ , S.O. ３ R ８ and NO ２ and is substituted by one or two groups selected from R ７ COOM, OCH ２ COOM, SO ３ M or OPO ３ M ２ and M is H or a cation equivalent, and R ８ is C １ ~C ４ Alkyl, phenyl, naphthyl, phenyl-C １ ~C ４ Alkyl or C １ ~C ４ The binder composition of claim 1 wherein the alkyl group is alkylphenyl.

9. 2. The binder composition according to claim 1, wherein component F) comprises a hydroxycarboxylic acid, a polycondensate of said hydroxycarboxylic acid, or a sulfite addition product of said hydroxycarboxylic acid and citric acid or tartaric acid, preferably wherein said hydroxycarboxylic acid, said polycondensate of said hydroxycarboxylic acid, or said sulfite addition product of said hydroxycarboxylic acid is glyoxylic acid, a polycondensate of glyoxylic acid, or a sulfite addition product of glyoxylic acid, more preferably wherein said polycondensate of glyoxylic acid is an amine-glyoxylic acid condensate, even more preferably wherein said amine-glyoxylic acid condensate is selected from the group consisting of melamine-glyoxylic acid condensates, urea-glyoxylic acid condensates, melamine-urea-glyoxylic acid condensates, and polyacrylamide-glyoxylic acid condensates, in particular urea-glyoxylic acid condensates.

10. The component F) is R2 is H, R3 is a C optionally substituted by 1 to 5 OH ３ ~C ６ alkyl, and R4 is COOY, and Y is X and is an alkali metal; 2. The binder composition of claim 1, comprising a salt of formula (I) having the formula:

11. The component F) comprises at least two compounds selected from the group consisting of a compound of formula (I) and a polycondensate of the compound of formula (I), preferably, the component F) comprises a mixture of a compound of formula (I) and a polycondensate of the compound of formula (I), more preferably, the component F) comprises a polycondensate of glyoxylic acid and the following moiety: R2 is H, R3 is a C optionally substituted by 1 to 5 OH ３ ~C ６ alkyl, and R4 is COOY, and Y is X and is an alkali metal; 2. The binder composition of claim 1, wherein the salt is a salt of formula (I) having the formula:

12. The binder composition further comprises: H) supplemental cementitious materials in an amount of 0.5 to 68.989 wt. %, based on the total weight of the binder composition.

2. The binder composition of claim 1, comprising:

13. Use of a retarding admixture (RM), comprising, based on the total weight of the retarding admixture (RM), RM1) a carbonate selected from the group consisting of organic carbonates, alkali metal carbonates, and mixtures thereof in an amount of 30-60 wt. %; RM2) in an amount of 5 to 20 wt. % of NR １ R ２ R ３ and / or metal salts thereof, wherein R １ ~R ３ is independently C １ ~C ６ -hydroxyalkyl, RM3) in an amount of 10 to 30 wt. % of R ５ -(CHOH) ｏ -R ４ and / or metal salts thereof, wherein R ４ and R ５ is independently C １ ~C ６ -hydroxyalkyl, and o is an integer from 0 to 1; RM4) a component RM4) selected from the group consisting of compounds of formula (I), polycondensates of said compounds of formula (I), and mixtures thereof, in an amount of 12 to 50% by weight, wherein formula (I) is 【Chemistry 13】 wherein: R1 is OH, R2 is H, OH, C １ ~C ６ Alkoxy, —SO ２ X, -SO ３ X, -OSO ３ X, -PO, -PO ３ X ２ , -OPO ３ X ２ , -Z-COOX or -CH(OH)-SO ３ X, R3 is H, COOX, C optionally substituted by 1 to 6 OH ３ ~C ６ Alkyl or C １ ~C ６ is an alkoxy, m is 0 or 1, or when m is 0, R1 and R2 together with the carbon atom to which they are attached form a carbonyl group; R4 is COOY or SO ３ X, X is H or a cation equivalent K ａ wherein K is selected from an alkali metal cation, an alkaline earth metal cation, a zinc cation, an iron cation, an ammonium cation, or a phosphonium cation, and a is 1 / n, where n is the valence of the cation; Y is X, C １ ~C ６ alkyl or phenyl, and Z is CH ２ or CH(OH), and a dispersant having a charge density greater than 0.80 μeq / g; Said use for improving the spreading and / or compressive strength of a construction material composition comprising Portland cement clinker, calcium sulfate, sodium sulfate and optionally auxiliary cementitious materials.

14. Concrete comprising the binder composition of any one of claims 1 to 12.

15. Use of a retarding admixture (RM), comprising, based on the total weight of the retarding admixture (RM), RM1) a carbonate selected from the group consisting of organic carbonates, alkali metal carbonates, and mixtures thereof in an amount of 30-60 wt. %; RM2) in an amount of 5 to 20 wt. % of NR １ R ２ R ３ and / or metal salts thereof, wherein R １ ~R ３ is independently C １ ~C ６ -hydroxyalkyl, RM3) in an amount of 10 to 30 wt. % of R ５ -(CHOH) ｏ -R ４ and / or metal salts thereof, wherein R ４ and R ５ is independently C １ ~C ６ -hydroxyalkyl, and o is an integer from 0 to 1; RM4) a component RM4) selected from the group consisting of compounds of formula (I), polycondensates of said compounds of formula (I), and mixtures thereof, in an amount of 12 to 50% by weight, wherein formula (I) is 【Chemistry 14】 wherein: R1 is OH, R2 is H, OH, C １ ~C ６ Alkoxy, —SO ２ X, -SO ３ X, -OSO ３ X, -PO, -PO ３ X ２ , -OPO ３ X ２ , -Z-COOX or -CH(OH)-SO ３ X, R3 is H, COOX, C optionally substituted by 1 to 6 OH ３ ~C ６ Alkyl or C １ ~C ６ is an alkoxy, m is 0 or 1, or when m is 0, R1 and R2 together with the carbon atom to which they are attached form a carbonyl group; R4 is COOY or SO ３ X, X is H or a cation equivalent K ａ wherein K is selected from an alkali metal cation, an alkaline earth metal cation, a zinc cation, an iron cation, an ammonium cation, or a phosphonium cation, and a is 1 / n, where n is the valence of the cation; Y is X, C １ ~C ６ alkyl or phenyl, and Z is CH ２ or CH(OH), and a dispersant having a charge density greater than 0.80 μeq / g; The use for retarding the setting of inorganic binder containing building material formulations and / or for producing building products.

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