Study On The Technical And Economic Evaluation Of Highway Of Emulsified Asphalt Cold Regeneration

Due to the rapid development of economy, the traffic volume increased, resulting in larger vehicles and heavy overloading of vehicles increased rate, resulting in accelerated various diseases Road, greatly shorten the overhaul interval of time, road maintenance, transformation of the task is also more and more heavy. According to the design life of the asphalt pavement (10-15) and the actual use, from now on, about12%of the asphalt pavement need revision every year, the old asphalt mixture waste volume will reach220tons, if we can make full use of it, a year can save material cost of3-5billion, and this figure it is increasing at an annual rate of15%. Maintenance method of traditional is when the old pavement damage, the strength is insufficient, need to fill strong improved, the old asphalt pavement structure layers and all dug up, and then to the base layer and the surface layer, so that not only the high construction cost, construction period is longer, the pollution of the environment, and need a long time to interrupt the traffic, vehicle and pedestrian access brings great inconvenience.With the increase of traffic volume and vehicle load, the damage on the road is also more and more big, be built in90years after the highway has entered a large, medium repair period, highway repair at present for the excavation or cover, to new paving road. The excavated material basically been abandoned, which part of the aging of asphalt, gravel and other materials function still exists. Digging, milling asphalt mixture was abandoned caused extensive environmental pollution, on the other hand, the energy crisis has become an important issue facing the development of countries in the world. For our country which lack high quality asphalt countries is a waste of resources, but also the use of a large number of new stone quarrying, will lead to the decreasing of forest ecological environment, soil erosion serious damage.Recycling of waste asphalt pavement mixture, can save a lot of natural resources, thus saving construction cost and can improve the pavement comfort, prolong the service life of the pavement, reduce maintenance costs and traffic line breaking caused by pavement maintenance. Using the waste asphalt mixture of waste, to reduce dependence on natural resources, environmental resources can keep balance, can effectively alleviate the problem of environmental pollution of waste asphalt mixture, so this technology popularization and application of highway transportation industry, China’s development has the significant economic benefit and good social benefit.This paper describes the properties, methods, emulsified asphalt cold recycling mechanism, promotion of significance and practical in the role, and through the engineering application to take the financial net present value analysis method to make the expressway cold recycling emulsified asphalt evaluation of economic life.