Study Of Asphalt Pavement Structure And Material With Function Layer

Along with the rapid development of China highway, asphalt pavement as a major form of pavement structure has been widely used. Although highway asphalt pavement in number is growing rapidly in recent years, the quality still has a lot of problems. The universal existence problems like durability and early damage, caused adverse social influence and serious waste, and became difficulty and hot issues during the development of traffic construction.Asphalt pavement structure has a variety of forms. After many years of practical application in our country, we chose semi-rigid base structure form, and this choice is based on the national situation. Facing the increasingly serious asphalt pavement early damage, to solve semi-rigid base asphalt pavement structure early damage problem and to improve the long-term using performance of asphalt pavement are becoming major task now. In order to solve the early damage of semi-rigid asphalt pavement, optimizing the asphalt pavement structure is the key point.Aiming at the phenomenon in our country that semi-rigid base asphalt pavement structure early damaged seriously, through investigated and analyzed highway semi-rigid base asphalt pavement diseases, this paper studied on mechanism of asphalt pavement structure early damage. Through the research, we found it's a fundamental way to resolve semi-rigid base asphalt pavement structure early damage problem from the asphalt pavement structure design. Based on summarizing the existing use experiences and lessons and fully learning foreign asphalt pavement design and use experiences, we proposed a kind of design idea that set asphalt treated base and asphalt treated permeable base between asphalt concrete and semi-rigid base to improve asphalt pavement using performance. Based on the theory of fracture mechanics, this paper also estimate the fatigue life of the semi-rigid asphalt pavement and the pavement with function layer, which shows that the latter has a better anti-fatigue performance.Based on the elastic layered system theory, the anti-rutting performance of two structures were analyzed, results showed that t the pavement with function layer has good resistance to rutting performance. Besides, based on the research at home and abroad, we proposed design and evaluation method of asphalt treated base aggregate gradation and mixture design method of asphalt treated mixture.At last, we used this pavement structure in test road. It is proved in test road that asphalt pavement structure setting asphalt treated base has good using performance.