Use of Copper Slag as Fine Aggregate and Partial Replacement of Cement

Abstract

The use of copper slag (CS) as fine aggregate and partial substitute of cement for mortar preparation was studied. Results showed an increase on compressive and flexural strength at 3, 7 and 28 days using CS as fine aggregate. As partial replacement of cement, a gradual improvement on compressive and flexural strength at 7, 28 and 90 days was noticed. At 7 and 28 days, the control mortar (CM) shows higher compressive strength and flexural strength. Nevertheless, at 90 days, the CM and mortars prepared with CS showed similar compression and flexural strength. The use of CS in the construction industry is hence presented as an auspicious alternative for improving the quality of mortars and mitigating the environmental impacts of slag deposits, adding extra value on this metallurgical waste and reducing the shortage of aggregates of northern Chile.