In order to study the performance of carbonized recycled coarse aggregate and its effect on the mechanical properties of recycled concrete,the accelerated carbonization technology was used to prepare carbonized recycled coarse aggregate.The CO2 concentration of the carbonization chamber was 100％,and the pressure was 1 Bar and 10 Bar,respectively.Concrete was prepared with recycled coarse aggregate replacement rates of 0％,25％,50％,75％and 100％.The physical properties of recycled coarse aggregate and the compressive strength,static elastic modulus and flexural strength of concrete were tested.The results show that:(1)After accelerated carbonization treatment,the physical and mechanical properties of recycled coarse aggregate are improved;(2)Compared with non-carbonated recycled coarse aggregate concrete,the compressive strength and flexural strength of carbonized recycled coarse aggregate concrete have been significantly improved;(3)Compared with natural aggregate concrete,the compressive strength and flexural strength of concrete did not decrease significantly when the replacement rate of carbonized aggregate was less than 50％.
维普
万方数据