Concrete mix that produces high strength concrete at varying density, method for producing the mix and concrete, and use of an anionic additive

摘要

"CONCRETE MIXTURE PRODUCING HIGH RESISTANCE CONCRETE IN VARIOUS DENSITY, METHOD FOR PRODUCING MIXING AND CONCRETE, AND USE OF AN ANYNIC ADDITIVE". The present invention relates to an aqueous concrete mixture having an air pore volume of between 10 and 85%, preferably between 20 and 85%. After curing, a concrete with uniform density and high strength is obtained. This is achieved by the use of an anionic aqueous surface active compound containing two groups of sulfonic acid of the general formula (I) (R) - (R) - R - 1 - (SO - 3 - M) - 2 -, wherein R is an aliphatic group having from 4 to 20 carbon atoms, m is a number 1 or 2, the sum of the number of carbon atoms in the group or groups R being from 6 to 30, R is an aromatic group containing at least minus 2 aromatic rings and from 10 to 20 carbon atoms, and M is a cation or hydrogen. The anionic compound has a drag effect and improves the homogeneity of the concrete mix.