Performance evaluation between ternary blended SCC mixes containing induction furnace slag and crushed stone as coarse aggregate

Abstract

This study compares the fresh and mechanical performance of ternary blended self-compacting concrete (SCC) mixes made with induction furnace slag (IFS) and natural crushed stone as coarse aggregate. Two series of ternary blended SCC were produced, first with natural coarse aggregate and the next with IFS coarse aggregate. Fresh characteristics such as unconfined flowability, passing ability, and segregation resistance of all the SCC mixes were assessed. Their mechanical properties were evaluated through compressive strength, splitting tensile strength, modulus of rupture, elastic modulus, and pull-off bond strength tests. From the above tests, it was inferred that the fresh properties of SCC mixes were considerably enhanced with the usage of IFS coarse aggregate, but the mechanical performance of SCC mixes containing IFS coarse aggregate were slightly inferior to the similar mixes made with the natural crushed stone coarse aggregate. In both the aggregate series, comparing to the SCC made only with cement, utilization of 10% silica fume (SF) and upto 30% ground granulated blast furnace slag (GGBFS) enhanced the mechanical properties of the SCC mixes through their secondary hydration process.