Research on the Application of Double-layer Synchronized Hot In-place Recycling Technology for Rubber Asphalt Pavement
Focused on the technical issues of using double-layer synchronized hot in-place recycling method to reuse old mate-rials from the surface and middle layers of rubber asphalt on highways.The performances of rubber asphalt in SMA-13(stone mastic asphalt)on the surface layer and Sup-20(Superpave mixture)on the middle layer of the original pavement were investigated.The recovery effects of the amount of rejuvenator on penetration and softening point were analyzed.By labo-ratory tests,the effects of asphalt content and direct-throw high viscosity modifier dosage on the high-temperature perform-ance and water damage resistance of asphalt mixtures were compared,strategy for improving performances of recycled asphalt rubber mixtures was proposed.The double-layer synchronized hot in-place recycling process was verified in a practical engi-neering project.Results from in-situ measurements showed that the performances of recycled asphalt mixture were effective-ly improved and good functional properties of the road surface were achieved.The research can provide a reference for the de-velopment of new generation hot in-place recycling and maintenance technology for asphalt pavement in China.
double-layer synchronized hot in-place recyclingrubber asphaltcomposite modificationrejuvenatorrecy-cled asphalt mixture
万方数据
维普
