FIELD: building industry. SUBSTANCE: invention elates to manufactory of wall materials and compositions used for making heat-insulating structural compositions. The composition comprises the following components, wt.-%: amorphous silica, 55.0- -68.0; water glass, 8.0-15.0; burning out additives, 20.0-25.0. Invention provides preparing light-weight strength heat-insulating brick as structural wall material exhibiting high strength indices and improved exploitation indices by heat-insulation and sound-insulation and corresponding for requirements hardiness and providing its preparing by the more plastic and technologically effective molding method. EFFECT: improved preparing method, valuable properties of composition. 3 cl, 2 tbl
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