FIELD: chemistry.
SUBSTANCE: invention relates to use of a combination of a pozzolan source and a metal salt additive to reduce shrinkage and/or high thermal strength on a calcium sulphate-based product containing gypsum, wherein pozzolan source is contained in amount of 4–27 % or 4–9 wt. % by weight, and metal salt additive is contained in amount of 0.5–10 % or 2–9 wt. % by weight (based on weight of gypsum, pozzolan source and metal salts). Invention is developed in dependent claims.
EFFECT: disclosed are fire-resistant products based on calcium sulphate.
14 cl, 2 tbl
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