Experimental study on mechanical properties of steel fiber reinforced lightweight aggregate concrete

5 groups of SFLWC specimens with different steel fiber volumes fraction of 0, 0. 5%, 1. 0%, 1. 5% and 2. 0% were tested to investigate the effect of steel fiber content on static mechanical properties and impact resistance of lightweight aggregate concrete. The static mechanical properties include cubic compressive strength, prismatic compressive strength, splitting tensile strength, first-crack flexural strength, flexural strength, modulus of elasticity, flexural modulus, flexural toughness, etc.. The experimental results indicate that addition of steel fiber can greatly improve such mechanical properties as the splitting tensile strength, flexural strength, flexural toughness and impact resistance, but has a little effect on compressive strength and modulus of elasticity. Furthermore, the tensile compressive ratio and ductility of lightweight aggregate concrete were remarkably improved with the addition of steel fiber.