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An Experimental Study on Utilization of Copper Slag as Fine Aggregates in Cement Concrete Pavements

Author(s):

Ramprasad Kumawat , Shekhawati Institute of Engineering and Technology, Sikar

Keywords:

Copper Slag, Compressive Strength, Flexural Strength, Ultrasonic Pulse Velocity, Flexural Fatigue, Stress Ratio

Abstract

In this experimental investigations carried out to evaluate the effects of concrete mix properties prepared with partial replacement of fine aggregates by copper slag at levels of 10%, 20%, 30%, 40%, and 50%. In this study, M30 grade concrete was considered to study the strength parameters, compressive and flexural strength development for concrete curing periods of 3, 7 and 28 days. It was found that all mixes yielded comparable or higher compressive and flexural strength than the control concrete for all curing periods. Compressive and flexural strength increases with respect to the percentage replacement of copper slag by the weight of fine aggregate up to 40% replacement. The compressive strength of cube and flexural strength of beam at 28 days curing period was increased by 27.20% to 55.70% and 10.87% to 26.62% respectively with replacement of copper slag. The quality of concrete mixes was found good from ultrasonic pulse velocity. Flexural fatigue analysis was carried out to predict fatigue life of concrete specimens where 40% of fine aggregate was replaced by copper slag and maximum strength is obtained; at three stress ratios (0.65, 0.70 and 0.75 of fatigue failure loads). From the data obtained S-N curves are developed using linear regression model considering log normal distribution as is being presently adopted. The number of repetitions to failure was compared with the IRC: 58 model and found that up to 0.75 stress ratio it shows more number of repetitions to failure than the suggested IRC-58 fatigue life and at higher stress ratio it fail earlier.

Other Details

Paper ID: IJSRDV6I120342
Published in: Volume : 6, Issue : 12
Publication Date: 01/03/2019
Page(s): 573-578

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