Pollution Research Paper

Vol.33, Issue 01, 2014; Page No.(17-21)

FEASIBILITY STUDIES OF COPPER SLAG AS FINE AGGREGATE REPLACEMENT IN CONCRETE

M. VELUMANI AND K. NIRMALKUMAR

Abstract

Copper slag (CS) is a by-product obtained during the metal smelting and refining of copper. It is one of the materials being considered as a waste and many researchers have investigated the possibility of using copper slag as a replacement of fine aggregate in concrete matrix. This paper reports the results of feasibility studies of copper slag as fine aggregate replacement in concrete. The physical and chemical properties of copper slag were determined experimentally. The concrete mixtures were prepared with the proportions of copper slag as fine aggregate replacement ranging from 0% (for the control concrete) to 100% (copper slag concrete.). The specimens were carried out for testing to determine the compressive strength, tensile and flexural strength for age 7, 28 and 60 days of curing and also to determine the workability by slump test. Adding up to 40% of copper slag as sand replacement yielded more strength with that of conventional M35 grade concrete. However, further additions of copper slag caused reduction in strength with that of control concrete specimens due to the increase of free water content in the mix. Hence it is suggested that 40% weight of copper slag can be used as replacement of fine aggregate for the nominal standard M35 grade concrete for the Construction Industries.

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