| 摘要 |
The invention relates to the composition of multicomponent concrete modifier of polyfunctional action. A complex concrete modifier contains a dispersed mineral component comprising rock or mixture thereof with flue ash and/or with products of gas cleaning of furnaces, which are melting siliceous alloys, plasticizer and additionally calcium hydroxide in such component ratio, wt. %: disperse mineral component 80-98, plasticizer 2-20, calcium hydroxide 0.01-10, which provides the presence in the modifier of the following oxides in such their content, wt. %: SіО20-66, АlO4-27, SO4-26, СаО 3-22, НO 3-12. The dispersed mineral component contains kaolin and gypsum subjected to heat treatment as a rock. The modifier additionally contains air-entraining admixture in quantity of 0.01-1.0 % from the modifier mass. As plasticizer the modifier contains a salt of -naphthalene sulphonic acid and formaldehyde polycondensate and/or lignosulphonate, and/or polycarboxylate. The invention provides a high grade and initial compression strength and bending tensile strength of concrete, as well as compensation of shrinkage, expansion or autostressing of concrete. |
