FIELD: chemistry.
SUBSTANCE: invention relates to production of construction materials. The crude mixture for making silicate bricks, which contains quartz sand, ground unslaked lime, crushed mineral wool, has the following ratio of components, wt %: quartz sand 87-87.5, ground unslaked lime 10.5-12, crushed mineral wool 0.5-2.5.
EFFECT: high frost resistance.
1 tbl
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