The dynamic shear rheological test was used to evaluate the aging condition of asphalt binder,with varying mix process.Test results showed that the aging condition of foamed asphalt was lower,and the road performance of asphalt mixtures must be affected.Performance tests were implemented for the medium-grain asphalt concrete( HMA-AC-20,FWMA-20-RAP,FWMA-20) with the same gradation.As a result,foamed asphalt mixtures manifested better compaction,and better moisture-damage resistance.The fatigue cracking and low temperature cracking resistance was better than HMA-AC-20,while dynamic stability of compacted foamed asphalt mixtures increased a lot after joining the RAP,but it was still for behind the HMA-AC-20.