FIELD: building materials. SUBSTANCE: composition has, wt.-%: water glass 18-30; clay raw 47-57; 4-9; foam-forming agent 1-3; carboxymethylcellulose 1-4.5, and water 9-19.5. Clay raw is clay. Foam-forming agent is aluminium powder. Composition properties: density is 180-600 kg/m3, compression strength is 2.5-20 MPa, heat conductivity is 0.082-0.14 Wt/m0K, water absorption by volume is 8-10%, working temperature range is up to 1500 C, low limit is unlimited, volume multiplicity is 4-5. EFFECT: enhanced quality and property of composition. 2 cl, 2 tbl
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