Experimental Investigation on the Effect of Curing Condition and Admixture on Meso-Structure of Recycled Aggregate Concrete Based on X-ray CT

Abstract This study addresses the meso-structure of recycled aggregate concrete with different admixture and c;uring condition. The RCA (Recycled aggregate) slag power fly ash curing condition steam was casted. X-ray CT (Computed tomography) used to obtain RCA, pore structure, aggregate, interface traction zone were analyzed. results show that not only increases volume but also makes morphology more complex, fractal dimension increases, proportion spherical pores decreases, develop from flat slender increase temperature. porosity micron in is about 2.3%, which aperture less than 300 μm accounts for 85%. thickness area between new mortar 200 μm, crack width 300– 400 μm.