Influence of Ferro silica slag on the durability properties of conventional concrete

Abstract

Researchers have recently discovered the lack of natural aggregates in the construction industry to clarify new substitute materials. The electric arc furnace (EAF) produces waste material known as Ferro silica slag (FSS). The motivation of this study is to evaluate the durability of conventional concrete (CC) containing Ferro silica slag (FSS) as coarse aggregates (CA). Total seven mixes produced. The control concrete contains no slag and only natural aggregate. FSS contains a constant percentage of 20%, 40%,60%,80% and 100%. FSS 40% substitutions were achieved for the minimum chloride penetration resistance. The maximum pulse velocity marked for FSS 20%, 40% substitution with as replacement to C.A. Ultrasonic pulse velocity (UPV) values of FSS 40% mix were under the excellent quality of concrete beyond 28 days of curing. The results were confirmed by microstructure analysis (gel condition and rate of hydration). It was concluded from the study that the use of slag aggregates in optimum percentage benefited as slag aggregates in conventional concrete achieved better strength and durability performance.