Shear Behavior of Recycled Concrete Beam from Building Wastes

Abstract

There are six beams made from recycled concrete and one from common concrete in the test. We conduct a shear test on them to analyze how the fracture morphologies, shear capacity and oblique crack width of beams are subjected to change with the replacement rate and shear-span ratio of recycled aggregates. The results reveal that the two fracture morphologies, i.e. shear stress and oblique tension, occur on the recycled concrete beams. Shear span ratio is still the dominant factor that affects the failure mode and load capacity of recycled concrete beams. In the end, this paper proposes the computation formula for the ultimate flexural and shear capacities of recycled concrete beams, which provides a reference for further exploration and application of recycled concrete in structures.