A review on strength characteristics of GGBS based fiber-reinforced lightweight aggregate concrete

Abstract

Abstract This study is a review on the strength characteristics of Lightweight concrete (LWC)using lightweight expanded clay aggregate (LECA), supplementary cementing material (GGBS) and micro-steel fibers at its optimum percentages. Based on the review of literatures, preliminary experiment is conducted to determine the effect of partial replacement of conventional coarse aggregate with light weight expanded clay aggregate (LECA) on its strength characteristics, Comparison is made with conventional concrete to check the suitability of structural lightweight concrete for various construction purposes. A total of 14 cubes of size 100 mm × 100 mm × 100 mm are cast by varying the percentages of LECA as 30%, 50% and 100%. On comparison, it is noted that the density of concrete decreased in the range of (6.2%-38%) with increase of LECA content, meanwhile strength characteristics were reduced. So in order to achieve enhanced strength characteristics by retaining the benefits of LECA, cement was partially replaced with Ground granulated blast furnace slag (GGBS) at its optimum percentage (40%) and Micro steel fibers are also added to improve tensile characteristics and to prevent micro cracks in the Light weight concrete specimens.