FIELD: building materials. SUBSTANCE: invention relates to a foaming agent for heat-insulating concrete comprising protein-containing substance, technical sodium hydroxide, ammonium chloride, ferrous sulfate, technical sodium fluoride and water and comprising horn-hoofed raw as a protein-containing substance by All-Union State Standard 18253-72 being components are taken in the following ratio, mas. p.: indicated horn-hoofed raw, 100; technical sodium hydroxide, 3-10; ammonium chloride, 15-75; ferrous sulfate, 15-25; technical sodium fluoride, 3; water, 390- 397. Invention can be used in production of effective heat-insulating concrete. Invention provides rise of foam stability of a foaming agent for preparing cellular concrete and reduction of their volume mass. EFFECT: valuable technical properties of agent. 1 tbl
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