The Experimental Study on the Frost Resistance of Different Recycled Coarse Aggregate Replacement Rate of Recycled Concrete

Abstract

The different recycled coarse aggregate replacement rate of recycled concrete blocks are exposed to different times of freeze-thaw cycles in fresh water and concentration of 3.5% sodium chloride solution respectively, then the loss of mass and relative dynamic modulus are calculated. The influences of recycled coarse aggregate replacement rate of recycled concrete on the frost resistance are analysed. The research results show that the frost resistance of recycled concrete in the replacement rate of 30% performs the worst, and the effect of freezing thawing in sodium chloride solution on the performance of recycled concrete is worse than that in fresh water.