FIELD: construction.
SUBSTANCE: method to produce high-strength waterproof gypsum products is characterised by the fact that acid pit waters are neutralised by self-decomposing slag of ferroalloy production to form moist gypsum-containing slag, slag is soaked in a reservoir for 10-12 days, extra water is squeezed to residual moisture of 40-45%, and from the produced paste they mould products of specified configuration, which are exposed to drying at room temperature during a day, and then exposed to autoclave treatment.
EFFECT: development of highly efficient method to produce waterproof gypsum products with high physical and mechanical properties, recycling of wastes of pit mines and slag of ferroalloy production under considerable reduction of costs for manufacturing of items.
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