Experimental study on the shrinkage behavior of concrete made with recycled coarse aggregate

摘要

A basic research on shrinkage resistance of recycled coarse aggregate concrete subjected to different substitution rate was carried out. In this experiment, there were 30%, 40%, 50%, 70% natural stone substituted by recycled coarse aggregate and part of cement replaced by active admixture. The results showed that autogenous shrinkage, total shrinkage and drying shrinkage develop rapidly in the early age, and the shrinkage of concrete increased along with the amount of recycled coarse aggregate increased while the benchmark water-binder ratio was under the same circumstance.