Influence of RAP Content on Mechanical Properties and Pavement Performance of Warm Recycled Asphalt Mixture
Warm recycling technology is an effective new technology for recycling recycled asphalt pavement(RAP).In order to improve the pavement performance of warm recycled asphalt and effectively enhance the recycling rate of RAP,the influence of RAP content on the performance of warm recycled asphalt mixture was investigated through mechanical properties and pavement performance analysis,and the correlation between dynamic stability and mechanical parameters of creep tests under repeated loading was discussed.The results show that with the increase in RAP content,the high-temperature stability,shear resistance,and elastic deformation resistance of warm recycled asphalt mixture are improved,but the low-temperature crack resistance and water stability are decreased.In addition,there is a good linear correlation between the flow number and the dynamic stability,and the flow number can be used to evaluate the high-temperature rut resistance of the mixture.Under the same RAP content,the performance of the modified warm recycled asphalt mixture is superior to that of the ordinary warm recycled asphalt mixture.When the RAP content reaches 70% ,the performance of the mixture can still meet the specification requirements,which provides a basis for later engineering application and quality control.
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