Dimensionally stable geopolymer compositions and method
AssigneeUnited States Gypsum Company
InventorAshish Dubey
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Abstract
A method for making geopolymer cementitious binder compositions for cementitious products such as concrete, precast construction elements and panels, mortar and repair materials, and the like is disclosed. The geopolymer cementitious compositions of some embodiments are made by mixing a synergistic mixture of thermally activated aluminosilicate mineral, calcium aluminate cement, a calcium sulfate and a chemical activator with water.
Claims58
An aluminosilicate geopolymer composition comprising the reaction product of a thermally activated aluminosilicate mineral;
- a calcium aluminate cement;
- a calcium sulfate selected from the group consisting of calcium sulfate dihydrate, calcium sulfate hemihydrate, anhydrous calcium sulfate and mixtures thereof;
- a chemical activator selected from the group consisting of an alkali metal salt and an alkali metal base and mixtures thereof, and water.
A settable mixture for forming an aluminosilicate geopolymer composition when reacted in water, comprising:
- about 35 to about 96% by weight of a thermally activated aluminosilicate mineral;
- about 2 to about 45% by weight of a calcium aluminate cement,
- about 1 to about 45% by weight of a calcium sulfate selected from the group consisting of calcium sulfate dihydrate, calcium sulfate hemihydrate, anhydrous calcium sulfate and mixtures thereof;
- and
- about 1.0 to about 6.0% by weight of a chemical activator selected from the group consisting of an alkali metal salt and an alkali metal base, or mixtures thereof.
Dependencies are inferred from the claim text.