Using refined decomposition technology to treat recycled asphalt mixture(RAP)can reduce the variability of RAP and improve the road performance of recycled asphalt mixture.Through the refined de-composition RAP test of different processes,the rule and variability of refined decomposition RAP aggregate gradation and asphalt content were analyzed.The recycled asphalt mixture was prepared by refined decomposi-tion RAP,and the influence of refined decomposition process on the road performance of recycled asphalt mix-ture was analyzed.The results show that the gradation(after extraction)and asphalt content of RAP(origi-nal)without refined decomposition have great variability.The refined decomposition process reduces the varia-bility of RAP aggregate gradation(after extraction)and asphalt content,and improves the stability of RAP and the quality of raw materials of recycled asphalt mixture.The refined decomposition process is conducive to im-proving the road performance of recycled asphalt mixture,especially the dynamic stability and maximum ben-ding tensile strain.The refined decomposition process is conducive to improving the content of RAP in recy-cled asphalt mixture,ensuring the quality of recycled asphalt mixture,and improving the recycling level of RAP in asphalt pavement.
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