Dissertation > Transportation > Road transport > Road works > Road construction materials

Research on Cold Recycling to Old Asphalt Pavement with Lime-flyash

Author ChengZhiHao
Tutor PengBo
School Chang'an University
Course Road and Railway Engineering
Keywords Old Asphalt Pavement Ash Cold recycling Grass roots Regeneration Mechanism Construction technology
CLC U414
Type Master's thesis
Year 2011
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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 .

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