... lowering the quality of concrete, the addition of water dilutes the mortar Pumping pressures then may push mortar ahead of the coarse aggregate, causing a pumpline blockage In the past, the following ... meeting before the beginning of slab placement After the concrete proportions have been determined, the placing, consolidating, and leveling procedures can also be finalized The slump at which the ... be solved by increasing the fine-tocoarse-aggregate ratio Increasing the entrained air content within specification limits, or including or increasing the amount of an appropriate mineral admixture,...