FIELD: construction.
SUBSTANCE: invention claims method of obtaining protein foaming agent involving hydrolysis of raw protein-containing material of animal origin by alkali, hydrolysate neutralisation to obtain weak alkaline medium, further stabilisation of obtained hydrolysate by transit metal sulfate, and adding to hydrolysate an organic solvent represented by one or more substances selected out of: n-butyl alcohol, isobutyl alcohol, monobutyl ethyleneglycol ether, monobutyl diethyleneglycol ether, monobutyl propyleneglycol ether, industrial products of complex chemical composition consisting mainly of substances listed above, e.g. vat residues of butyl alcohol production or byproduct of butylcellosolve production, at the following ratio, wt. part: protein hydrolysate stabilised by transition metal sulfate 100; organic solvent 0.2-9.0.
EFFECT: enhanced expansion rate of foam generated by foaming agents obtained on the basis of hydrolysed proteins of animal origin, stabilised by transition metal salts, with preserved high durability of foam concrete manufactured using the claimed foaming agents.
2 cl, 3 tbl, 22 ex
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