| abstract |
FIELD: construction. n SUBSTANCE: invention relates to building materials, in particular to the mortar and concrete compositions with high efflorescence resistance, used in the manufacture of concrete products and structures. Concrete mixture with high efflorescence includes, by wt%: portland cement 18.7–23.0, sand with a fineness modulus M cr =1.8–2.2 71.1–76.0, polyfunctional additive 0.5–0.6, mixing water 4.7–5.4, wherein the polyfunctional additive used is a mixture of the following co-milled components, wt%: liquid glass 15.0–19.0, phosphogypsum 15.0–18.0, superplasticiser 30.0, pigment 33.0–40.0. Said concrete mixture, as a pigment in the polyfunctional additive, contains pyrolysis black in an amount of 33.0 wt% or ceramic dust in an amount of 40.0 wt%. n EFFECT: higher compressive strength and lower CaO efflorescence. n 3 cl, 5 tbl, 1 ex |