as in example 1 each containing 375 grams of cement and 675 grams of sand of coarser particles than in example 1 in addition the samples contained the following ingredients in grams it was observed that the samples s 5n were very sloppy such that no tamping or tapping was necessary to fill the propylene tube since the composition easily flowed whereas the samples s 5m were less flowable than samples 5n the samples cured for two weeks and then tested for water absorption unit weight and compressive strength following the procedure of example 1 with the following results one specimen from each of the s 5n samples and the s 5m samples were viewed under magnification and the wax particles were found to be well distributed in each case in addition when a drop of water was placed onto the surface of the s 5n and s 5m samples the water remained on the surface until it evaporated and thus was found not to be absorbed into the sample it was noted that the control sample turned white and lost weight faster than the s 5n and s 5m samples this unexpected occurrence could be explained by the waxes slowing the rate of evaporation of the excess water found inside the concrete masses it is believed that these crystalline or slack wax containing samples retained excess water whereas excess water evaporated from the control samples and consequently the necessity to cover freshly placed concrete pavement which is produced in accordance with the present invention with tarpaulins watered salt grass or other water retaining aids to retard the evaporation of water may be eliminated several different combinations.