Sieve analysis, moisture content, and bulk densities of the CCS, rivers sand and coarse aggregates were also determined. The unit weight of the concrete cubes decreased as the quantity of the CSS increases in the concrete. The compressive strength of the 50:50 sand: CSS replacement at 28 days for the 1:2:4 mix ratio is /mm 2 .
Mass,Weight and, Density. Density is mass per volume. Lead is dense, Styro is not. The metric system was designed so that water will have a density of one gram per cubic centimeter or 1000 kilograms per cubic meter. Lead is about 10 times as dense as water and Styro is about one tenth as dense as water.