Study of modified gypsum binder

Abstract Nowadays the addition of small amounts of chemical additives allows developing new types of binding materials. The effect of microadditives on the performance of β-hemihydrate gypsum has been studied. 1% content of complex additive contributes to enhancement of compressive strength and water resistance in modified samples as compared to reference one. These studies showed that additives accelerate the rate of hydration and lead to the formation of a dense and well-compacted texture of crystals, thereby imparting, to gypsum matrix, higher strength and better water resistance than the reference materials.