Study On Permant Deformation Of Recycled Asphalt Mixture

With the freeway volumes and natural environment,property of flexible pavements deteriorates gradually owing to asphalt aging and aggregate thinning and structure changing of asphalt pavement.Therefore,lots of pavements need to repair in large-scale even repave wholly after using a long time,which will bring large numbers of waste asphalt mixture.Therefore,it is important to reclaim the waste asphalt mixture in order to protect environment and economize resource.But one of the difficulties of recycling waste asphalt mixture is evaluating the characters of old asphalt,the other is that the effect factors of asphalt mixture performance required in-depth research?Firstly,this paper researches the hot-in-plant reclaimed asphalt mixture technologies on the basis of the results that people have ever examinated.By the current research both at home and abroad,and the investigation of pavement structure,traffic,damaged condition of,as well as the nature of the old material of the recycling pavement,the author analyzes the causes of pavements disease;Based on reclaiming mechanism of asphalt and nature of reclaiming agent,the author tests penetration,ductility,softening point of old asphalt with different volume of reclaiming agent,which come to the best volume of reclaiming agent.Secondly,from the recycled mix designation,the paper goes proved the scientific way of asphalt reclaiming according to the reclaiming performance of reclaimed asphalt mixture.Then analysis of a reclaimed mixture of road performance with different rate of old stuff mixed to determine the most suitable material that doped with the old stuff mix rate was 30%.The tests have proven that the reclaimed asphalt mixture has a good road performance which can be used in high-grade roads.With the development of industrial technology in China,as well as people living standard rise,car ownership has increased.This will lead to traffic and road load increasing,coupled with various harsh natural environment,Will inevitably lead to the degree of asphalt aging and the aging speed is accelerated,eventually making asphalt pavement will produce some cracks,holes and other diseases,road of road is a serious negative impact,seriously affecting the road traffic safety.the influence of early built a large number of highway in our country have entered the overhaul reconstruction phase of expansion.In this process will produce large amounts of waste asphalt mixture,if you don't use will cause resource waste and environmental pollution.And arises at the historic moment of recycled asphalt mixture technology can well solve these problems,to achieve lower engineering cost,saving a lot of sandstone material,can produce huge economic and social benefits,also accord with the requirement of low carbon environmental protection and sustainable development,should be vigorously promoted application in our country.