Experimental Investigation on Mechanical Properties of Concrete Replacing of Steel Slag as Coarse Aggregate

Abstract

The basic objective of this study was to identify alternative source of good quality aggregate which is depleting very fast due to the fast pace of construction activities. This paper describes the optimum level of replacement of Energy Optimized Furnace (EOF) steel slag by weight of coarse aggregate for a mix proportion of M20 grade concrete to find out the optimum ratio of steel slag. Civil Engineers have been challenged to convert industrial waste to useful building and construction material. In this study, the coarse aggregate is replaced from 0% to 100% with an increment of 10% to improve the strength of concrete. The workability for all replacement percentages meets the minimum requirement as per IS 456:2000. The bulk density of concrete also shows increment with increment in replacement percentages. The resources for the construction materials are rapidly depleting and thus their cost is also increasing. Nowadays, the experimental investigation for strength properties of concrete is carried out. The result shows that the compressive strength, split tensile strength and flexural strength have an increase up to 100% replacement of EOF steel slag. The Young’s modulus of elasticity for all percentage replacements is considerably higher than the theoretical value. Based on the overall observation, it could be recommended that slag could be effectively utilized as coarse aggregate in all the concrete applications.

Keywords: EOF steel slag, partial replacement, fine aggregate; bulk density, compressive strength, split tensile strength, flexural strength, Young’s modulus of elasticity