The Use Of The Asphalt Pavement In-place Cold Recycling In The G108 Heavy Maintenance

Old in-place recycling technology of asphalt pavement technique that repeated using the old asphalt material of the road will a new kind of surface, according to the structural feature of recycling structural layer properly joining partial new aggregation or fine aggregate and pouring into the proper water and stable additional things,under natural environment completing a series of processing technology of the material and forming a structural layer again.Based on the research results from home and abroad, and the characteristic of the widely-adopted semi-rigid pavement, the thesis studies the cold in-place recycling technology stabilized by cement. And the thesis proposes the method of the mixture design of cold in-place recycling. The primary mechanical indexes of the recycled mixture are tested, including the unconfined compressive strength, the cleavage strength and the resilient modulus. The changing law of these indexes related to the cement content, the aged-period and the testing temperature is explored and the relationship between indexes is established. The pavement behavior and performance of designed mixture is studied and contrasted with the mixture which is recommended by the Technical Specifications for Construction of Highway Roadbases, including mechanical performance, stableness, anti-brushing performance, the anti-crack performance and fatigue performance. Moreover, the thesis delves on the construction craft and quality control of the cold in-place recycling technology. The recycled mixture is applied to the base and this is proven to meet the requirements of pavement performanceThe thesis also draws a comparison between cold in-place recycling and rebuilding. And the results show that the in-place cold recycling is a viable technology, has broad development prospects, especially in the areas where lack of stand stone for reconstruction and large and medium-sized maintenance.