the compressive strength of concrete is one of the most important and useful properties of concrete. in most structural application concrete is employed primarily to resist compressive stresses. in those cases where strength in tension or in shear is of primary important, the compressive strength is frequently used as a measure of these properties. there fore , the concrete making properties of various ingredient of mix are usually measure in terms of the compressive strength.
compressive is also measure as a qualitative measure for other properties of hardened concrete. no exact qualitative relationship between compressive strength and flexural strength, tensile strength, modulus of elasticity, wear resistance, fire resistance, or permeability have been established nor are they likely to be.
