Properties Of Concrete With GBS And RCA

Abstract

The present experimental study considers, to partially/fully replace all three components namely, 30% replacement of ordinary portland cement (OPC) by ground granulated blast furnace slag (GGBS), 100% replacement of natural fine aggregate (NFA) by granulated blast furnace slag (GBS) and 0-20-40-60-80-100% replacement of natural coarse aggregate (NCA) by recycled concrete aggregates (RCA). Here, the influences of GGBS, GBS and RCA on the compressive strength of M30 grade of concrete with the constant water cement ratio of 0.50 at 7, 14 and 28 days along with Split Tensile Strengths at 28 day are presented. The observed results show higher strengths in the replacement of 100% NFA, 30% OPC and 0% RCA as compared to the conventional concrete. On further study observes in reducing the concrete strengths owing to the replacement of NCA by RCA. The optimum replacement of RCA at 28 day, was obtained as 80%.