FIELD: manufacture of building materials. SUBSTANCE: raw meal containing 83.5-94.5% carbonized loam, 15-5% compacted microsilica, and 0.25-0.75% calcium chloride is prepared by way of stirring carbonized loam with microsilica preliminarily compacted when aqueous calcium chloride solution is fed into granulator followed by molding, drying, and firing. EFFECT: extended raw materials base, increased frost resistance, and reduced consumption of materials. 2 cl, 2 tbl
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