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Feasibility evaluation of adding copper slag into concrete as sand substitute to realize sustainable production prospect

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Document pages: 11 pages

Abstract: From the perspective of sustainable production, a laboratory test plan was carried out to determine the feasibility of using copper slag to replace natural fine aggregate in concrete. A total of 15 concrete mixtures were prepared, and copper slag was used to replace the fine aggregate in the concrete. Under the condition of water cement ratio of 0.44, the properties of concrete specimens prepared with different proportions of copper slag (substitution rate of 0 ~ 100 ) are compared, and the optimum content of copper slag is determined. Then change the water cement ratio (from 0.42 to 0.36) in the mixture containing the best percentage of copper slag to check the effect of the change of available water on the strength properties of concrete. The workability of concrete samples was evaluated density, compressive strength, flexural strength, and split tensile strength. SEM images and X-ray diffractograms of concrete specimens were also studied. The results obtained indicated a significant increase in workability and a small rise in the bulk density of concrete. The study concludes that substituting 60 sand with copper slag results in better compressive strength compared to control concrete and can be improved further by reducing the w c ratio in the mix.

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