Journals Proceedings

Abstract

The results of an experimental research work on high performance concrete is presented in this paper. The percentage content of recycled aggregate was between 0% - 100% at 25% interval. Microsilica was incorporated within the range of 0% - 20% at 5% intervals. The 28-day target mean compressive cube strength and water-cement ratio la(w/c) were 63MPa and 0.39 respectively. The aim of this research was to determine the optimum addition of microsilica required to achieve better strength and durability in high performance recycled aggregate concrete. Compressive strength, tensile splitting strength, modulus of elasticity, and water permeability tests were conducted on hardened concrete samples respectively. The results show very significant improvement in mechanical properties respectively. The addition of 15% microsilica produced maximum performance results in terms of strength increase and durability. Further addition above 15% led to reduction in mechanical properties.