Experimental Study on Compressive Performance of RC Columns with Recycled Aggregate

This paper presents the test results of 12 R.C. columns with recycled aggregates under axially loading and eccentrically loading, the dimensions of the column are width b=150mm, depth h=200mm and height l=1400mm, the recycled aggregate replacement rate of the concrete are 0%, 50% and 70% respectively, the concrete strength is of C40 grade. The compressive performance such as the strain of concrete and longitudinal reinforcement, the failure modes and the compressive bearing capacity of the R.C. columns with recycled aggregates are analyzed, and compared with the R.C. columns made of ordinary concrete. The results show that the compressive performance such as the loading process, the failure modes and the bearing capacity of the R.C. columns with recycled aggregates are almost the same as that of the columns with natural aggregate, the compressive bearing capacity of R.C. columns with recycled aggregates may be calculated by the stipulations of Chinese current design Code (GB50010). This may be as a reference for the application of the concrete with recycled aggregates in engineering.