FIELD: chemistry.
SUBSTANCE: aluminosilicate geopolymer composition comprising the reaction product of water, a chemical activator from the group consisting of an alkali metal salt, an alkali metal base and mixtures thereof, and a binding reactive material comprising a thermally activated aluminosilicate mineral - TAASM, cement based on calcium sulfoaluminate - CSA, and calcium sulfate from the group consisting of calcium sulfate dihydrate, hemihydrate calcium sulfate, anhydrous calcium sulfate, and mixtures thereof, wherein the weight ratio of the chemical activator to said binding material is from about 1 to about 6:100; said binding material comprises from about 33 to about 97 wt % of TAASM, from about 1 to about 40 wt % of cement based on CSA, from about 1 to about 40 wt % of calcium sulfate. The method for obtaining the above composition, comprising the reaction of a mixture of: water, a chemical activator, said binding material. The mixture for obtaining the above composition comprising CSA-based cement, TAASM and said calcium sulphate and activator at a weight ratio of CSA-based cement to TAASM from about 1 to about 100:100; and the weight ratio of calcium sulphate to the CSA-based cement from about 2 to about 100:100. The binding reactive material to obtain the above composition, comprising: from about 60 to about 85 wt % of TAASM wherein said TAASM comprises Class C fly ash, from about 8 to about 30 wt % of CSA-based cement, and from about 4.0% to about 15% by weight of calcium sulfate, and said chemical activator. The invention is developed in subclaims.
EFFECT: improved dimensional stability and durability.
15 cl, 59 dwg, 117 tbl, 31 ex
