How to Calculate Compressive Strength | Sciencing
Compressive strength, tensile strength and modulus of elasticity of concrete were tested at 1, 7 and 28 days of hardening and at a day, when concrete ring was cracking. Cube specimens 100 mm and 150 mm were used for compressive strength, cubes 100 mm for tensile strength, and cylindrical specimens measuring 150×300 mm for modulus of elasticity.