FIELD: construction.
SUBSTANCE: invention relates to an expanding admixture for tensioning and expanding cements. The expanding additive includes blast-furnace granulated slag, gypsum stone and alumina slag, and additionally contains iron-containing pulverized waste with a particle size of 1-200 microns. To prepare the mixture, components with a moisture content of 1–5% are used.
EFFECT: invention improves the strength characteristics of cements.
2 cl, 2 tbl
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