is believed to provide lubricity allowing for greater compaction which results in higher density with equivalent compactive forces the reduction in the water cement ratio in cement designs results in greater strength of at least gt 40 at 7 days reducing the optimum moisture content by at least gt 35 significantly increasing the density by decreasing air voids normally experienced with these mix systems benefits for such systems incorporating the wax emulsion modifier include higher compactive density or the same density with less compactive effort lower water demands for compaction lower cement requirements to obtain equivalent strength gt 2 and improved workability further advantages included lower transportation cost resulting from transporting less water and decreased permeability due to the reduction of interconnected air voids which improved water resistance benefits additionally include aesthetical advantages such as in the surface appearance of rcc incorporating the wax emulsion modifiers of the invention in another embodiment in final placement rcc mix designs the admixing of the wax emulsion modifier of the invention results in at least a gt 20 strength gain in 7 days and at least gt 10 in 28 days incorporating the wax emulsion modifer of the invention into such mixes allows for lower cement content to gain equivalent strengths allowing lower placement thicknesses to carry the same design loads table 1 lists the formulation of the modifier utilized in the examples in a typical preparation the water and water soluble components were combined then heated to a temperature of between about 185 u00b0 f 85 u00b0 c to about 205 u00b0 f 96 1.