A Research On Properties Of Hot In-place Recycling PE Modified Asphalt Mixture

The adoption of asphalt pavement recycling technology has significant economic, social and environmental benefits, while hot in-place recycling technology is a compatible with sustainable development requirements of road maintenance techniques. As massive early constructed highway entering repairs period gradually, popularization and application of the technology are imperative. However, asphalt pavement recycling technology in our country is still in its infancy, and the research mainly focus on common asphalt mixture and SBS modified asphalt mixture, etc. Meanwhile the PE modified asphalt is related to less. So, based on the practical project, this paper recycles the PE asphalt mixture and the performance of recycled materials was discussed.First of all, the comprehensive investigation and test of the old pavement material is done accord to the Construction of paragraphs using the hot in-place recycling technology; improves the recycling method and shows the real condition of the aging asphalt, and increases the reliability of property evaluation, meanwhile analyses the property evaluation of the old aggregate and its variation of gradation, gives the underpinning of the recycling aging asphalt and old aggregate.Secondly, analyses the performance requirements of the and test the two kinds of regeneration selected based on a brief description of aging and recycling of asphalt, prepares the old asphalt recycling experiment, analyses the experimental data and rules comprehensively to determine the regeneration agent content; accord to the old aggregate characteristics, makes sure the objects of recycling gradation and selects a set of new aggregates, analyses the recycled aggregate gradation; in the above analysis design the recycling asphalt mixture.Then, tests various properties of the recycled asphalt mixture, including mechanical properties, high and low temperature performance, moisture sensitivity, fatigue performance and resistance to aging, etc., evaluates recycled mixture design; finally, structure simulation experiments by APA proves the recycled materials thathave s good road performance.