FIELD: construction.
SUBSTANCE: raw mix for manufacture of fine-grained concrete contains, by weight %: portland cement 28.0-30.0; coal ash 69.75-71.7; carbamide 0.05-0.1; casein glue 0.1-0.15; wool waste 0.05-0.1, at the water cement ratio 0.45-0.55.
EFFECT: increase of durability of fine-grained concrete.
1 tbl
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