In this study, silica fume, which is finer than cement and used to substitute cement, gave concrete structures more
strength and longevity. Steel fibres are utilised to improve the ductility and strength of concrete. 50% of the coarse aggregate was
replaced with the 50% demolition waste aggregate. Cement with varying amounts of silica fume added (5, 10, 15, and 20%). For
hardened concrete, strength tests are carried out at 7 and 28 days to assess the strength, such as compressive and split tensile.
