Abstract:Based on the analysis of physical and mechanical properties of natural aggregate(NA), recycled concrete aggregate(RCA), recycled brick and concrete aggregate(RBCA), the effects of different RCA contents and 30% recycled brick content on CBR(California bearing ratio) value of mixtures were investigated, and the influence of the compactness and water content on dynamic resilience modulus of mixtures were studied. The results show that CBR value and dynamic resilience modulus of mixtures all increase with the increase in RCA content; for 30% recycled brick content in mixture, the CBR value and dynamic resilience modulus decreases considerably. The recycled brick content should be controlled properly in the engineering application. The effect of degree of compaction on dynamic resilience modulus of RCA mixture is the greatest, followed by RBCA mixture and NA mixture is minimum; the influence of water content on dynamic resilience modulus of NA mixture is small, but for RCA and RBCA mixtures is great. The conclusion can be used as reference for construction and demolition waste aggregate mixture as road structure layer.