Enhancement of mechanical performance oflLightweight aggregate concrete using pozzolanic materials

Abstract

The motive of reviewing this paper on high performance concrete and the light weight aggregates is to get proper information about all the individual materials, their engineering properties and how they behave when mixed all together. In this study, the mechanical property and durability performance of high strength lightweight aggregate concrete (LWAC) with silica fume for 91 days are presented. LWACs are designed to have the design compressive strength of 40 MPa at 28 days and the oven-dry density below 1900 kg/m3. Nine mixtures with three aggregate types and silica fume replacement ratio of 0%, 3.5% and 7.0% by cement weight were prepared. The splitting tensile strength, the compressive strength and the modulus of elasticity tests were conducted at 7 days, 28 days, 56 days and 91 days. The chloride penetration resistance tests were done at 28 days, 56 days and 91 days. The chloride diffusion coefficient based on the measurement of chloride penetration depth was also measured at 7 days, 14 days, 28 days, 56 days and 91 days.