Frost Resistance Property of Recycled Aggregate Concrete under Sulfate Environment

To explore frost resistance of recycled aggregate concrete with the help of sulfate,the experiment of freeze-thaw based on recycled aggregate concrete of which was 50 and 100 percent of replacement rates with two groups of recycled aggregate concrete and natural aggregate concrete in condition of sulfate was conducted to investigate the frost resistance property as the criterions were mass lose rates and relative dynamic modulus.The results showed the limited damage degree was characterized via mass lose rate and the change of relative dynamic modulus was sensitive,which can represent the damage degree of recycled aggregate concrete.The frost resistance of recycled aggregate is lower than natural concrete apparently,which can lay a basis for building the evolution equation which can illustrate the variation laws of frequency of freeze-thaw and relative dynamic modulus between Weibull probability function and freeze-thaw.It can provide some references for further studies.