FIELD: manufacture of building materials. SUBSTANCE: mixture is composed of 75-80 wt % of silica mineral (tripoli powder, opoka, or diatolite) and 20-25 wt % of concentrated alkaline waste from ascorbic acid production formed in the stage where diacetonesorbasa is prepared in the form of aqueous solution containing alkali, monoacetonesorbasa, and diacetonesorbasa. Filler is characterized by bulk density 400-500 kg/cu.m and strength 2.5 to 4.5 MPa. EFFECT: improved characteristics of filler. 1 tbl
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