PERFORMANCE OF SELFCOMPACTING CONCRETE USING RECYCLED COARSE AGGREGATE AND WASTE GLASS POWDER AT ELEVATED TEMPERATURE

Incorporating waste and recycled materials in concrete provides not only a longterm benefit, but also increased resistance to special circumstances that concrete structures face, such as fire. The crushed concrete aggregate has been used as a replacement to natural aggregate in SCC. Waste glass powder utilization as partial replacement of cement was studied. Fly ash can be used as a source to replace the existing building materials which is cost effective. If some of the waste materials can be suitable for concrete making it can reduce the cost of construction. The current study investigated the performance of incorporating recycled coarse aggregate (RCA) and two unprocessed waste powder materials on the residual mechanical properties of self-compacting concrete (SCC) after elevated temperature exposure. SCC mixtures have been created by adding the cement mass with up to 25% waste fly ash (WFA) and replacing cement mass as 10%,20%,30% by waste glass powder, as well as replacing the coarse natural aggregate (NA) with up to 50% RCA. Using RCA up to 50% enhanced the residual mechanical properties of SCC after exposure to the elevated temperature. Replacing cement by 10% waste glass powder gives satisfactory results at high temperature.