Paper Title
Mechanical Performance of Self-Compacting Concrete Incorporating Steel Slag Aggregate

Abstract
This paper presents an experimental work on compressive and flexural strength of self-compacting concrete (SCC) containing waste steel slag aggregate (SSA) and silica fume. In this work, a proposed design of a self-compacting concrete involves fresh-state empirical tests (Slump-Flow, Slump-Flow Time (T500), L-Box and V-Funnel) which are carried out using different fractions of steel slag replacing partially the natural fine aggregate. A total of five concrete mixtures were designed at different replacement levels from 0% to 50% (increment 12.5%) by total fine aggregate mass with constant water, cement, silica fume and superplasticizer contents. The results showed that an economical self-compacting concrete mixes were successfully designed by incorporating high percentages of waste steel slag. The slump flow decreased and both T500 and V-funnel time prolonged for SSA-based SCC mixtures without losing SCC fresh-state characteristics. Furthermore, it was found that the incorporation of SSA in SCC improved the mechanical strength, and that enhancement appeared to be more pronounced at higher SSA increments. Keywords - Steel slag aggregate; self-compacting concrete; workability, compressive strength; flexural strength.