FIELD: manufacture of building materials. SUBSTANCE: foamed alumina concrete is a mixture of water, clay, lime, cement, sea water, and blowing agent. Clay-water mixture is neutralized with lime in amount 1-3% based on clay volume. Prepared mix is successively stirred with cement at clay to cement ratio 1:(0.5-2), then with sea water in amount 1-2% based on cement weight, and finally with foam provided by blowing agent. EFFECT: improved physico-chemical properties of concretes, reduced cost of concrete building materials, and widened resource for cellular concretes owing to using clay components. 1 tbl
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