2.1 Properties of hardened concrete The mechanical properties of hardened concrete Short term properties Long term properties Strength in compression, √Creep,:Shrinkage tension and shear Stiffness measured by modulus of elasticity The compressive strength of concrete is the most common measure for judging the quality of concrete.2.1 Properties of hardened concrete The mechanical properties of hardened concrete Short term properties Long term properties üStrength in compression, tension and shear üStiffness measured by modulus of elasticity üCreep; Shrinkage The compressive strength of concrete is the most common measure for judging the quality of concrete