This study evaluates the shear strength and durability of concrete produced with Reclaimed Asphalt Pavement (RAP) and Recycled Coarse Aggregate (RCA) replacing Natural Aggregate (NA). The materials used in the study were cement, water, fine aggregate, coarse aggregate (NA, RAP, and RCA), and reinforcement steel bars. A Reinforcement steel bar size of diameter 12mm, was used as the shear link and main bars, while the beam size was 900mm x 300mm x 150mm. Twenty-one beams were cast comprising conventional concrete (control), RAP aggregate concrete, RCA concrete, and a blend of RAP and RCA concrete. Tests conducted on the hardened concrete with a 28-day target strength of 25 N/mm2 were the shear capacity of the reinforced concrete beam, and durability of the concrete (water absorption and resistance to acid attack). Results from the findings showed that concrete produced by replacing NA with a blend of 20%RAP and 20%RCA had the maximum shear strength, and is more durable than the control concrete. Also, the blend of 20%RAP and 20%RCA aggregate replacement in concrete had the least residual weight and strength loss after exposure to acid. Hence, it was recommended that a blend of 20%RAP and 20%RCA aggregate replacement in concrete should be adopted to achieve concrete with high strength and durability.
Key words: Shear strength, Steel reinforcement, Reinforced concrete, Beam, EuroCode
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