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Due to its design versatility, availability, and cost efficiency, concrete continues to play a dominant role in the construction industry. Typical concrete production requires a significant amount of nonrenewable resources. One way to improve the sustainability of this material is to use recycled concrete aggregate (RCA) in place of virgin aggregate. The purpose of this study is to investigate the use of RCA in reinforced concrete panels. Three reinforced concrete panels were cast: normal concrete aggregate (NCA), 25% RCA, 50% RCA and 100% RCA. The data show the compressive strength and elastic modulus of the concrete are reduced with increasing amount of RCA, while the tensile strength does not change significantly. For the reinforced concrete panels, the shear response is affected by inclusion of RCA, with a reduction in the initial stiffness and also an earlier observance of the first crack.

Effect of recycled concrete aggregate on the shear behavior of reinforced concrete panels