Study On The Application Of Large Stone Pemeabal Asphalt Mixture Gradation Design Method In Tailai Road

Large stone asphalt treated base is a common type of flexible base in foreign countries, this kind of structure is also most effective in the study on perpetual pavement in foreign road departments. It has favorable high temperature performance ,resisting on the reflection cracking and drainage performance .Now it have been paid high attention to by road researcher of China, In the decade, the asphalt pavement with semi-rigid base has been used widely in our country, but the reflection cracking and water damage have become the severe problems. To improve the performance of asphalt pavement, refer to the results of research in foreign countries and proceed with the large stone permeable asphalt mixture(LSPM).As flexible base of pavement, LSPM is similar to asphalt treated permeable base(ATPB)in some respect, it can directly take the use of the road surface support weight piece. But it to ATPB in design of gradation and has larger distinction in performance. This project refers to the newest research report, researched the design method of materials and performance of large stone asphalt mixture, discussed design standard and technology specification. Through the laboratory, the main contents and innovation Followed:1.Researched the gradation structure named"skeleton-gap",and it's mechanism of strength,Because the coarse aggregate formed the integrity skeleton to inlay pushes the structure, had the high module and resistance distortion ability, might resist the big plasticity and the detrusion, might take the road surface supporting course use.