Research on Cold Recycling to Old Asphalt Pavement with Lime-flyash
|Course||Road and Railway Engineering|
|Keywords||Old Asphalt Pavement Ash Cold recycling Grass roots Regeneration Mechanism Construction technology|
Booming in China 's road construction early paved highway some have entered the maintenance period , the country every year a large number of asphalt pavement is to be renovated , and showed a trend of increasing year by year , which means that each year will produce a lot of waste asphalt pavement material , if these The material is waste , not only a waste of resources , but also pollute the environment . Renewable technologies , old pavement material re-use , and effective measures in line with the sustainable development of the law of a . Thesis, lime and fly ash ( gray) stable cold recycling old asphalt pavement materials technology . First, standard compaction test , get the optimum moisture content and maximum dry density ; cold recycling mix mix design, given the cold recycling mix ratio recommended by cold recycling mix . Cold recycling mix unconfined compressive strength , splitting tensile strength and compressive resilient modulus and other major mechanical index , the variation of intensity with stabilizers dose and regimen age , and the establishment of the compressive strength - split crack strength and compressive strength - rebound modulus function relationship . On cold recycling mix road performance , cold recycling mix better stability ( water-stable and frozen stability ) ; Indoor erosion test results show that the cold recycled mixtures with a good anti-erosion properties ; cold recycled mixtures reduce shrinkage strain and the average shrinkage coefficient increases with increasing exposure time ; cold recycling mix temperature shrinkage coefficient first increased with decreasing temperature . Ash additives Old Asphalt Pavement Recycling Base to meet corresponding road performance requirements , is a modification techniques suitable for road maintenance , it has immeasurable economic , social and environmental benefits .