Research on the Design and Performance Evaluation of Large Content RAP Recycled Asphalt Mixtures
This study using indoor testing,analyzed the different RAP content,recycled asphalt mixture ratio design key parameters and key road performance change rule,the analysis results show that,with the increase of RAP content,the best asphalt mixture oil/gravel ratio has a slight increase in the void rate and the gap rate of the mineral;as the RAP content is increased,the best oil/gravel ratio in the asphalt mix gradually increases,as do the void rate and mineral gap rate.The results show that with the increase of RAP content,the optimal oil-rock ratio of asphalt mixture has slightly increased,the void ratio and mineral gap ratio gradually increased,and the Marshall stability gradually in-creased;with the increase of RAP content,the dynamic stability of the mixture gradually increased,while the low-temperature destructive strain is decreasing,the ratio of splitting tensile strength is gradually decreasing,the fatigue load is gradually increasing.
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