This article presents the results of model studies of the effect of ground cement-sand mortar with diffe-rent content of fine aggregate – sand, which imitates the sifting of the crushed concrete fines, on the some properties of alkali-activated slag-blended cements. The presented research results allows to conclude about possibility of sifting of the crushed concrete fines for blended alkali-activated slag cements production. Depending on the fineness and the ratio of C:S cement-sand mortars can be used for the aim to increase the strength up to 2 times, and to replace ground blast furnace slag in an amount up to 50% with finenedd not exceeding 400 m 2/kg.
alkali-activated slag-blended cements, ground blast furnace slag, crushed concrete fines
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