Recycling Technology Of Aged Asphalt Pavement

Along with our country highway construction peak past, massive early construction highway gradually enter major and medium repairs period, it can be anticipate that in the path profession the next peak arrival was the large quantities of highway maintenance. Simultaneously the social economy development, the natural resource consumption, sustainable development viewpoint proposing, it will receive the strict control to non-renewable resources. The reclaimed asphalt pavement has been proved to conformed to these requirements, it saved non-renewable natural resources such as the petroleum, natural stone material, and recycled these resources. Simultaneously it also avoids the environment pollution that the piled up rejection causes.The paper is supported by Crux Technology Of Recycling Old Asphalt Pavement, On the base of accepting recent research achievements and future advances in using reclaimed asphalt mixture in high-grade asphalt pavements and toward hot recycling of high-grade asphalt pavement,the paper is written by making a lot of trials which using two kinds of old asphalt mixture come from ChengYu Highway. First; Second, it elaborated the asphalt aging and the regeneration mechanism and found out the way to recycle the old asphalt. And compose two type recycling agent correspond to five-year and ten-year old asphalt. Finally, after comparative analysis a series of reclaimed asphalt mixture's road performance trials are made by way of selecting different recycling agent and old asphalt mixture's proportion of two of years, mixture design are made. To research of the recycled asphalt pavement mixture performance, indexing of mixes high temperature performance, low temperature performance, fatigue performance, moisture sensitivity and long-term performance. Compared with the fresh bituminous mixture.The results indicate:(1) Different old asphalt were aged in different degree, ten-year old asphalt was aged more than five-year's; the grading of aggregate changed in evidence; the performance of physics-mechanics performance index of aggregate was changed little and satisfy to the requirements of the standard.(2) After mixing 7per A-type and 5per B-type recycling agent into old asphalt separately, the technical parameters of recycled asphalt resume to the fresh asphalt's...