FIELD: chemistry.
SUBSTANCE: invention relates to construction materials and can be used for preparing wood filler. The method of preparing concrete bark filler involves grinding bark to a 0.003 to 0.025 m fraction, moistening to moisture content of 30 to 60%, powdering with gypsum powder, treatment with a film-forming protective polymer-silicate composition, which consists of liquid glass and latex, with the following ratio of components, wt %: liquid glass 88 to 92, latex 12 to 8.
EFFECT: increased use of bark and increased concrete strength.
1 cl, 3 tbl, 1 ex
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