Mortar latex mix

A process of producing a concrete paving which comprises:

• (a) preparing a cement mortar composition of Portland cement, aggregate, water, from about 1 to about 15 parts by weight on a dry weight basis per 100 parts of cement of a latex of a polymer comprising from about 40 to 70 parts by weight of styrene, from about 60 to 30 parts by weight of butadiene, from about 0.5 to about 5.0 parts of N-methylolacrylamide by weight of said polymer, or from about 0.5 to about 5.0 parts by weight each of N-methylolacrylamide and acrylonitrile by weight of said polymer, said parts in total of N-methylolacrylamide and acrylonitrile being from about 1.0 to about 6.0 parts by weight of said polymer, and a dispersing agent being a polymerized or condensed alkyl substituted or unsubstituted naphthalene sulfonic acid or salt thereof in an amount of from about 0.5 to about 8 weight percent of the polymer content of said latex;
• which composition provides increased compressive and flexural strength when cured and permits a reduction in the water content thereof while providing a plastic flowable mix;
• (b) applying the mixed composition as a layer to a pavement sub-base;
• and
• (c) curing the pavement.