Utilization of micro copper slag in SCC subjected to high temperature

This study investigated the effect of high temperature (100 ᵒС, 200 ᵒС, 300 ᵒС, 400 ᵒС, 500 ᵒС, 600 ᵒС, 700 ᵒС and 800 ᵒС) as one of the destructive factors of the self-consolidating concrete (SCC) performances containing ground copper slag (GCS) as a cement replacement in different percentages. Fresh concrete tests (slump flow, V-funnel, and L-box) and hardened concrete tests (compressive and split tensile strength) were performed before heating. Compressive and splitting tensile strength, mass loss, porosity tests, inspection expansion crack, and the color change were also evaluated on heated specimens. Results indicate that the properties of fresh concrete, such as flowability and filling ability will be improved in all replacement percentages. But up to 15% replacement, the mechanical properties of the SCCs is improved. At all temperatures, the best performance belongs to the replacement of 5%. Whereas in higher replacement percentages (20%, 25%, and 30%) a more inappropriate performance at high temperature happened.