Research On New Technology Of Microwave Heating Of Asphalt Pavement

The development of highway is closely relevant to nation-building of a country.It becomes significant to improve the project of high grade highway in order to make a powerful China.By the reason of natural environment and service life of pavement,the asphalt pavement will face the problems of pits,cracks and embrace.So a reasonable scheme of repairing should be put up with,in order to make sure the pavement can still satisfy the requirement of transportation.In this thesis is mainly about how to enhance the efficiency of pavement mending by using microwave technology for asphalt heating,auxiliary to complete the road surface temperature regeneration and maintenance,to improve the efficiency of road maintenance and achieve the reuse of asphalt.Firstly,the thesis explains the background and current situation of microwave-asphalt pavement technology.A microwave heating device has been proposed by theoretical analysis to overcome the trouble of asphalt pavement heating.In order to improve the problem of heating uniformity,the radial helical antenna is studied,and the structural parameters are optimized.The effectiveness of the experiment is verified by experiments..In this thesis,an array radiator based on radial helical structure is designed to improve the near field radiation of electromagnetic field microwave energy.And now it is put into use in asphalt pavement vehicles for pavement repairing.Secondly,In this thesis,the thermal conversion efficiency of microwave heating is improved by covering a kind of electromagnetic metamaterial structure on asphalt pavement.In this thesis,the design of electromagnetic metamaterials is carried out,and the radiation source is optimized.The feasibility of the scheme is verified by experiments.Its effect on the shallow heating is remarkable and can be applied to asphalt pavement deicing treatment.The results of the thesis has been applied in practical engineering and the effect is good.The application of electromagnetic metamaterials in microwave asphalt pavement heating is worthy of further study.