FIELD: construction.
SUBSTANCE: method of hexavalent chrome reduction in cement compositions involves joint milling of clinker with reduction agent selected out of group including: hydroxylamine, hydrasine, their salts or derivatives. Also invention concerns cement composition obtained by claimed method, and additive for cement, including claimed reduction agent. Invention is elaborated in dependent clauses of the formula of invention.
EFFECT: stabilised cement and cement-containing composition properties, possible application at high temperatures without impairing durability.
24 cl, 6 tbl, 5 ex
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