EFFECT OF FLY ASH AND COPPER SLAG ON MECHANICAL PROPERTIES OF CONCRETE
RUPINDER KAUR
Department of Structural Engineering, PEC, Chandigarh (Deemed to be University), India , IN
DR SARITA SINGLA
Department of Structural Engineering, PEC, Chandigarh (Deemed to be University), India , IN
Keywords: mechanical properties of concrete, fly ash and copper slag.
Abstract
The present study aims at developing the concrete mixes incorporating fly ash and copper slag as a partial replacement of cement and fine aggregates respectively. The aim is to study the mechanical properties of modified concrete with fly ash and copper slag and to compare it with reference mix i.e without any supplementary material. Cement was partially replaced by fly ash with 20%, 30%, 40% replacement, fine aggregate was partially replaced by copper slag with 30%, 40%, 50% replacement. The design mix was worked out as per Indian standard guidelines and various trials were performed to obtain the mix of grade M-25 at 28 days. In this study, the compressive strength, split tensile strength and flexural strength of concrete mixes for different percentage of replacement of cement and fine aggregate are obtained at 7 days and 28 days. After analysis of test results, it was found that performance of binary mix with fly ash was less than that of reference mix whereas performance of binary mix with copper slag was higher than that of reference mix. Results of ternary mix with both fly ash and copper slag was found to better than that of reference mix. Cube compressive strength of mixes showed up to 27% increase in strength, split tensile strength showed up to 50% increase in strength, flexural strength showed up to 20 % increase in strength. Maximum increase in compressive strength, split tensile strength and flexural strength was found for the M10 mix i.e. mix with 30% fly ash and 40% copper slag.
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