FIELD: chemistry.
SUBSTANCE: invention relates to setting agent for gypsum hydration, in particular to setting agent, which reduces period of initial induction, slowing down gypsum setting. Gypsum product contains matrix of calcium sulphate dehydrate crystals with crushed brushite crystals, distributed in said matrix, with crushed brushite suspension being present in quantity from approximately 0.013% to approximately 1.7% by dry brushite weight counted per weight of calcium sulphate dehydrate.
EFFECT: fast initiation of crystallisation.
9 cl, 2 tbl
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