FIELD: chemistry.
SUBSTANCE: crude mixture for synthesis of sulphated cement, containing limestone, a clay and a sulphate component, contains a sulphate component in form of hydrated sludge containing the following, wt %: CaO 24.8-25.2, SiO2 0.38-0.43, Al2O3 4.8-4.9, Fe2O3 8.7-8.9, SO3 33.5-34.1, with the following ratio of ingredients, wt %: limestone 54.8-70.8, clay component 16.5-25.2, said hydrated sludge 4.0-28.7.
EFFECT: reduced power consumption, high strength of cement.
1 ex, 3 tbl
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