FIELD: construction.
SUBSTANCE: raw mix contains the following components, wt %: argillites - 69.0-74.8; diopside-containing rock - 10-15; crushed glass - 9.5-10.5; building gypsum - 4.92-5.1; alumnium powder - 0.58-0.6; sodium hydroxide, 2H solution - 29.6-30.0% above 100%, of dry mixture, V/G - 0.42-0.45.
EFFECT: increased strength of porous items with preservation of their density and temperature of annealing.
3 tbl
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