Geothermal Renewable Technology In The Beijing-tibet Expressway Asphalt Pavement Making To Zhongning Period Of Applied Research

As one of the materials of building roads.asphalt has good abrasion resistance,surface smooth,traffic fast,simple maintenance and driving comfort and other characteristics,especially in the aspect of maintenance,can adapt to analyze maintenance,frequently used in various grades of highway in our country.But with the increase of the asphalt surface use fixed number of year,and the overload vehicles cause asphalt roadbed capacity reduce gradually.On geothermal renewable technologies into late in our country,but the application of speed and degree is high,at present our country is geothermal regeneration technology of asphalt pavement outside the scope of the coverage has reached 500 square meters,has become a very important one way of maintenance and renovation of highway,highway maintenance in our country plays an extremely important role.With the large-scale development of several years highway,highway maintenance task in our country is getting heavier and heavier,highway management department of management tasks is becoming more and more heavy,with the large-scale development of highway construction and highway’s maintenance and repair work is becoming more and more heavy,the highway maintenance has brought to the attention of the highway management departments,at the right time for highway maintenance can reduce the maintenance cost of highway,prolongs the service life of highway,improve highway and economic effect,thus for maintenance of highway is the top priority of the current highway management departments.As much as possible in order to fund utilization improved,new technology is increasingly applied to the highway maintenance,including highway construction of the new material,new technology and new technology,new way of maintenance and repair of highway is increasingly used in highway management department.Also appeared in the process of building roads,according to the construction site of different plant mixed hot regeneration and geothermal regeneration.Plant mixed operation of the thermal regeneration process,first of all.to the old asphalt cold milling planer,the milling planer mixture concentration to the mixing station.the reunification of asphalt mixing concentrated heating regeneration;Geothermal regeneration by using unit,heat the asphalt road to dig up and at the scene,to dig up and heating the asphalt road after spraying regeneration agent,after on-site mixing of in situ regeneration of asphalt paving rolling forming process.This approach can be very effective to repair the old asphalt road,the original asphalt which will be in the form of mechanical scarifying,recycle unification to stir,add new aggregate,asphalt,regenerative agent,will be to resurface,renewable materials such as asphalt compaction.To eliminate pavement problems,realization of the function.Asphalt pavement is geothermal regeneration process compared with the traditional process before has more advantages,can in the protection of environmental protection,cost saving,saving the maintenance time and so on to get higher levels of achievement,further safeguard the social economic benefits.Based on asphalt pavement is the use of geothermal renewable technology present situation and application of the asphalt pavement will analyze the necessity of geothermal renewable technology,aiming at the problems facing today,through the analysis of the test to the old road material,points out its applied conditions and advantages and disadvantages.Based on regenerative agent performance,the asphalt with the combination of sex and new material to add various combinations were analyzed such as contrast will be the most suitable for asphalt pavement is geothermal regeneration technology of raw materials.Mixed raw material need to be done by the high temperature stability test,low temperature resistance,water stability test,as well as the compressive strength test and so on,through the above test selected the most suitable for geothermal regeneration technology of asphalt road maintenance of raw materials.Through the analysis of the construction process and research,and summarizes the key link of the construction technology,extract the acceptance inspection of the content such as data,and connecting with the actual situation of construction of comprehensive analysis of economic benefits.For transportation engineering discipline,research on asphalt pavement is geothermal renewable technology,can provide theoretical research significance for the development of the professional,and has a deep study of the connotation of the rich academic significance.