FIELD: building materials production. SUBSTANCE: proposed binder contains 2.5-3.5 mass % of gypsum, 0.5-1.5 mass % of calcium chloride, 25-33 mass % of lime aleurolite and fly ash having high calcium content. Content of free calcium oxide in said fly ash is 16-32 mass %. EFFECT: improved quality of desired product. 2 tbl
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