FIELD: building materials production. SUBSTANCE: raw material mixture comprises, mas. %: finely crushed quartz sand, 49-52; sodium silicium-fluoride, 4.9-5.1; liquid sodium glass, 29-31; frothing agent, 3.8-4; bis(alkylpolyoxyethylene)phosphate having formula [CnH2n+1O(C2H4O)6]2•POH, where n= 8-10 used as additive, 1.25-1.28. Neutralized product of treatment of asphalt with sulfuric acid is used as mentioned above frothing agent. Density of articles is 370-450 kg/m3, their compressive strength is 3.5-6.0 MPa, heat conductivity at 25 C is 0.11-0.13 Wt/m K and acid-resistance in hydrogen chloride acid is 97-98 %. EFFECT: improved quality. 2 tbl
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