Influence of Metakaolin on Stone Waste Aggregate Concrete

Abstract

The present paper reports the utilization of industrial stone waste in construction works as coarse aggregate. The black stone waste (BSW) aggregates collected from the stone industry was used as coarse aggregate by replacing the natural aggregate with different replacement levels of 0%, 25%, 50% and 75%. In addition, this work also investigates the influence of Metakaolin (MK) on the compressive strength and splitting tensile strength of concretes made with BSW aggregates. BSW aggregate concrete mixtures were prepared the replacement of cement with MK in the replacement levels of 0%, 5%, 10% and 15%. Results have shown that, the addition of MK involve to increase the mechanical properties of black stone aggregate concrete. The optimum strength results were obtained at 10% MK replacement level. Beyond the replacement level of 50% of natural aggregate with BSW aggregate MK blended concretes the strength results were lessened as compared to that of the concrete made with natural coarse aggregate (i.e. 0% BSW aggregate).