CONCRETE MIXTURE FOR MAKING HIGH-STRENGTH CONCRETE OF DIFFERENT DENSITY, METHOD OF ITS PRODUCING, CONCRETE AND METHOD OF ITS PRODUCING Russian patent published in 2002 - IPC

FIELD: building industry and materials. SUBSTANCE: invention relates to an aqueous concrete mixture having volume of air pores from 10 to 85%, preferably from 20 to 85% and to concrete having homogeneous density and high strength. Method of making involves addition of an aqueous anionic surface-active compound to concrete mixture. This compound has two groups of sulfonic acid of the general formula (R)_m-R₁-(SO₃M)₂ where R means aliphatic group containing 4-20 carbon atoms; m is the whole number 1 or 2 and total amount of carbon atoms or in groups R is 6-30; R₁ is an aromatic group containing at least 2 aromatic cycles and 10-20 carbon atoms; M means monovalent cation or hydrogen atom preferably. Anionic compound shows air-absorbing effect and improves homogeneity of concrete mixture. EFFECT: homogeneous density and high strength of concrete. 14 cl, 5 tbl, 3 ex