Modulus is a term used to describe how a particular property of a soil or substance would perform when compared to another of its property. It is commonly used in making designs and in prediction. In soil for instance, the modulus related to plasticity represents the effective contribution of the plasticity of the fines to the performance of the whole material, which depends on the proportion of the fines measured from sieve analysis (find attached US standard sieve numbers and sizes commonly used around the world and in Nigeria). Common modulus usually encountered in civil engineering studies are shown in the second slide.
