FIELD: construction.
SUBSTANCE: invention relates to construction materials industry, in particular to the production of fine-grained concrete. Crude mixture for manufacturing fine-grained concrete contains, wt: portland cement 24–26; quartz sand 74–76; water-retaining additive – agar 0.05–0.5; water 12–14.
EFFECT: higher strength of fine-grained concrete.
1 cl, 1 tbl
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