FIELD: construction.
SUBSTANCE: invention relates to compositions of mixtures for making light brick. Ceramic mixture contains following components, wt.%: intershale clay 50-70; waste from flotation concentration of anthracite 30-50. Waste from flotation concentration of anthracite contains following oxides, wt.%: SiO2 - 28.4; Al2O3 - 13.7; Fe2O3 - 5.83; CaO - 1.53; MgO - 1.24; R2O - 1.92; other impurities = 47.38.
EFFECT: high frost resistance and low density of light brick.
1 cl, 4 tbl
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|
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