Hardened Concrete
Concrete after final set, when it has gained measurable strength and dimensional stability. Properties are tested on cured specimens.
Hardened concrete properties: compressive strength, modulus of elasticity, density, permeability, and durability. Tested per IS 516 and related standards.
The maximum compressive load a hardened concrete cube or cylinder can withstand before failure. The defining property of structural concrete.
The mass per unit volume of concrete. Normal-weight RCC concrete has a density of approximately 2400 kg/m³.
The ability of concrete to allow fluids or gases to pass through it. Lower permeability = better durability against chloride, sulfate, and freeze-thaw attack.
The standard compressive strength test for concrete. 150 mm cubes are cured in water at 27±2°C and crushed at 7 and 28 days.