FIELD: building industry.
SUBSTANCE: invention relates to building materials, in particular, to compositions of concrete mixtures and can be used in industrial and municipal building for making monolith and assembled concrete and ferroconcrete constructions. Invention provides the development of the non-shrinkage modified concretes with early hardening times and corresponding to requirements in manufacturing building works based on monolith concretes. The concrete mixture comprising Portland cement, crushed stone, water and complex modifying agent that comprises a plasticizing agent and air-drawing in additive the complex modifying agent comprises technical lignosulfonate as a plasticizing agent, alkaline effluent from manufacturing caprolactam as an air-drawing in additive and, additionally, potash K2CO as regulator of liquid phase in their ratio by mass = 1:0.1:1, respectively, in the following ratio of components in concrete mixture, wt.-%: Portland cement, 21.13-22.14; sand, 28.31-30.00; crushed stone, 41.26-42.03; complex modifying agent of indicated composition, 0.13-0.18; water, the balance.
EFFECT: valuable properties of concrete mixture.
3 tbl, 2 dwg
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Authors
Dates
2004-08-27—Published
2002-07-01—Filed