Both compressive test and drying shrinkage test on recycled aggregate concrete with different fine recycled aggregate replacement ratio

Both compressive test and drying shrinkage test on recycled aggregate concrete with different fine recycled aggregate replacement ratio were studied.The results show that with the replacement ratio increase,recycled concrete are becoming more and more brittle;with the mixing proportion design of free W/C and the secondary mixing process,compressive intensity of recycled concrete is nearly comparable with those of normal concrete with similar composition.The shrinkage theory of the recycled concrete is the same as natural aggregate concrete,with the increase of the curing ages,the shrinkage of the recycled concrete increases;the shrinkage of the recycled concrete is higher than that of natural aggregate concrete;with the increase of the replacement rate,the shrinkage of the recycled concrete increases.