Experimental Investigation on Complete Stress-Strain Curve of Recycled Concrete Under Uniaxial Loading

The complete stress-strain curves of recycled aggregate concrete with different recycled coarse aggregate replacement percentages were tested and investigated. An analysis was made of the influence of varying recycled coarse aggregate contents on the complete stress-strain curve,peak stress,peak strain,elastic modulus and compressive strength etc.The test results show that the stress-strain curves of recycled aggregate concrete are similar to those of the conventional concrete.Whereas for the recycled aggregate concrete,the ratios of the prism compressive strength to the cube compressive strength and the peak strain are higher but the elastic modulus is lower than those of the conventional concrete.Finally,equations are proposed for the complete stress-strain curve of recycled aggregate concrete with different recycled coarse aggregate replacement percentages.