摘要 |
FIELD: construction. ^ SUBSTANCE: portland cement contains an unbaked dolomite, a granulated blast-furnace slag, a portland cement clinker and a calcium sulfate dihydrate at the following ratio of components, wt %: unbaked dolomite 5.0-15.0, granulated blast-furnace slag 5.0-15.0, portland cement clinker - 75.0-77.5; calcium sulfate dihydrate - 2.5-5.0. ^ EFFECT: higher early and 28-day strength of a cement stone. ^ 4 tbl, 1 ex |