The construction industry is rapidly growing, leading to the limited availability of materials such as cement and sand in the environment, which in turn causes material prices to rise. If produced continuously in large quantities, this can damage the environment. The application of HVFA-SCC technology, combined with the utilization of copper slag from copper smelting waste, provides a solution to reduce dependence on natural aggregate materials and decrease industrial waste volumes.
An experimental method was used in this study by preparing test specimens in which a portion of the fine aggregates was replaced with copper slag. The objective was to determine the optimum compressive strength and modulus of elasticity of the concrete. The copper slag substitution levels varied from 0%, 10%, 20%, and 30% of the fine aggregate weight, with fly ash content at 50% of the cement weight.
The test results showed that the substitution of copper slag up to 20% increased compressive strength, while a 30% substitution led to a decrease in compressive strength. Thus, the optimum variation was achieved with 20% copper slag, resulting in a compressive strength of 38.57 MPa and an elastic modulus of 41238,50 Mpa.
Keywords: Copper Slag, HVFA-SCC, Compressive Strenght, Modulus of Elasticity