FIELD: construction.
SUBSTANCE: concrete mixture comprises, pts. wt. portland cement 26-28, expanded perlite sand, crushed to pass through the mesh No. 014, 29.7-37.7, fine quartz sand 12-16, sodium methylsiliconate or sodium ethyl silicate 0.2-0.3, water 24-26.
EFFECT: increase of strength of concrete units.
1 tbl
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