Physical and mechanical properties of high strength semi-light weight concrete

摘要

The effect of aggregate composition, the maximum particle size of lightweight aggregate, mineral admixture and the volume percentage of sand on high strength semi-lightweight concrete is investigated. The effects on compressive strength, splitting tensile strength, modulus of elasticity and dry apparent specific gravity are reported. Test results show that aggregate composition affects both physical and mechanical properties of semi-lightweight concrete. Reducing the maximum particle size of lightweight aggregate or introducing mineral admixture can improve its compressive strength and splitting tensile strength but these changes have negligible effect on its dry apparent specific gravity.