The Research On Asphalt Emulsion Cold Recycling Technology

Highway construction of our country has rapidly developed in the last 10 years. At the end of 2007, the total length of highway has exceeded 53.6 thousand kilometers. 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.This paper is based on asphalt pavement recycling technique experiences and research results, firstly, Old asphalt pavement performance is evaluated, including asphalt aging degree and aggregate condition, the reaction mechanism, stabilizing mechanism and Strength Formation Mechanism of emulsified asphalt mixture are introduced in the paper.Plenty of tests are performed with different design methods, at last, re-corrected superpave experiment are used. Different cement content mixtures are designed and performance are evaluated.Moreover, the thesis delves on the construction craft and quality control of the plant-mix cold recycling technology with Asphalt Emulsion. The recycled mixture is applied to the below layer of asphalt pavement and this is proven to meet the requirements of pavement performance.The thesis also draws a comparison between plant-mix cold recycling and rebuilding. And the results indicate that plant-mix cold recycling is a desirable mode in road mass-reconstruction, in particular in the regions lacking grit and pebbles.