FLEXURAL RESISTANCE OF SELF COMPACTED CONCRETE BEAMS BY PARTIAL REPLACEMENT OF OPC WITH GGBS

Self compacting concrete (SCC) has the property of flowing and compacting due to its own weight. Since compacting of concrete in the presence of grid locked reinforcements are increasing, the need for self flowing concrete is felt very much. Meanwhile Ground Granulated Blast Furnace slag (GGBS) will be an effective alternate to cement which contains cementitious material. In this study, self compacting concretes were considered using GGBS by replacing Portland cement with 10%, 20%, 30%, 40% and 50% by weight. The rheological and mechanical properties of SCG (GGBS incorporated SCC) were found to be increased compared to conventional concrete. Six reinforced concrete beams (SCGB) of shear span to depth ratio (a/d) 2 were tested for flexural capacity and ductile behaviour. The experimental cracking moment of SCGB beams were found to be more than the theoretical cracking moment enhancing its flexural resistance. Also, SCGB beams with higher percentage of GGBS exhibits higher ductility. The outcomes reveal that use of GGBS in SCC enables higher performance with economy and sustainability