FIELD: manufacture of building materials. SUBSTANCE: heat-insulating mixture contains the following ingredients, % by weight: disintegrating slag of low-carbon ferrochrome production 1-8; diatomite filter screenings 36-48; sodium hydroxide 18-22; boric acid 3 and water for the balance, with water-solid ratio being at least 0.23. EFFECT: improved heat-insulating performances. 2 tbl
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