COMPOSITION GYPSUM BINDER Russian patent published in 2011 - IPC C04B11/28 

FIELD: construction.

SUBSTANCE: composition gypsum binder, containing β-semihydrate of calcium sulfate, portland cement, active mineral additive - thermally activated zeolite-containing marl or waste of silicious iron - microslica MK-85, or a binary mixture of two specified active mineral additives at the ratio of 1:3 - 3:1, organic water-reducing reagent - product on the basis of modified polycarboxylate Melflux® 265IF or a mixture of technical lignosulfonate plasticiser and a product on the basis of the modified polycarboxylate Melflux® 265IF at the ratio of 4:5 in the amount of 0.8-0.9% from the mass of the binder, at the following ratios of components, wt %: portland cement of brand 34-37, β-semihydrate of calcium sulfate 50-55, thermally activated zeolite-containing marl 0-13, waste of siliceous iron production - microsilica MK-85 0-13, plasticiser - technical lignosulfonate LST 0-0.4% from the weight of composite gypsum binder, the product of the basis of the modified polycarboxylate Melflux® 265IF 0.5-0.8% from the weight of the composite gypsum binder.

EFFECT: improved physical-mechanical properties of the binder, improvement of its durability.

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