Abstract:
A hydraulic cement mix including hydraulic cement, aggregate, sufficient water to effect hydraulic setting of the cement, and an admixture comprising a mixture selected from an olefin sulfonate, an alkylarylsulfonate, an alkyloamide, an ethoxylated fatty amine, an alkanolamine, and a hydrolyzed starch having a dextrose equivalent value in the range of commercial corn syrups, the admixture being present in an amount sufficient to increase the compressive strength of nonplastic cementitious mixes such as those used in making masonry units, pipe and the like. Generally, the additive is present in an amount between 0. 005 and 0. 5 weight percent based on weight of cement.