COMPARATIVE STUDY OF SELF COMPACTING CONCRETE USING RECYCLED COARSE AGGREGATE

Abstract

In the present study, the focus is placed on the experimental research of Self-Compacting Concrete systems (SCCs) produced by replacing the natural coarse aggregates (NCA) with recycled coarse aggregates (RCA). By its utilization, not only the natural resources will be preserved but also environmental pollution will be minimized. Moreover, the issues of storage and disposal sites will be reduced. In this research, the fresh and hardened properties of SCC with different replacement levels of RCA (0%, 25%, 50% and 100%) with NCA were investigated. The water to cement ratio (w/c) was kept constant. Moreover, Self-compacting mortar (SCM) was also prepared by passing freshly mixed SCC through 2mm sieve to observe the effect of RCA. The fresh properties tests results indicate that the viscosity of the freshly mixed SCC increases with the increase in replacement levels of RCA while the hardened properties of SCC are reduced with such replacements. The compressive strength of SCC with 100% replacement of RCA reduced up to 30% of conventional self-compacting concrete. The overall results suggest that RCA can be used as replacement of NCA to produce structural concrete.