Investigation on the Strength Development of Concrete Blended with GGBS

Blended cements are obtained by mixing Ordinary Portland Cement with mineral admixture or additives like fly ash, slag or silica fumes. Blended cements are now being considered superior as compared to conventional OPC category of cements. This led to the resurgence of blended cements. There was a concern that whether the blending of supplementary cementitious materials (SCM) while grinding at plant or mixing the SCM directly on site works better. In this research work, emphasis has been given on studying the performance of concrete made by Portland Slag Cement as well as concrete made with OPC and GGBS. For achieving these different cement contents of 300, 320, 340, 360, 380 kg/m3were selected. The first sets of mixes were with Portland Slag cement and the second sets of mix were with Ordinary Portland Cement + GGBS maintaining the cementitious content in the mix for comparison. The w/c has been maintained for both the batches. Compressive strength results shows that PSC cement gave better performance than OPC+GGBS combination.