Experimental research on mechanical properties of recycled aggregate concrete

Through a series of experiments, used construction rubbish as recycled aggregate, the compressive strength and elastic modulus of recycled concrete specifically were studied, which recycled concrete specimens with this recycled aggregate, that contain C20, C30 & C40 these three kinds of compressive strength levels by different recycled coarse aggregate contents (30%, 50% & 100%). The results show that the compressive strength and prismatic compressive strength of the recycled concrete are higher than natural concrete basically. The elastic modulus is lower than natural concrete, and with the increase of recycled coarse aggregate contents, it reduces. In addition, a new equation on the relationship between elastic modulus and compressive strength of the recycled concrete was put forward.