Study On Key Technique Of Asphalt Pavement Construction In High Temperature And Rainy Area

There are many forms of asphalt pavement diseases in the hot and rainy areas.The most typical manifestation is the occurrence of rutting diseases in hot season and the water damage in asphalt pavement in rainy areas.From asphalt pavement material preparation point of view,leading to a variety of diseases is the main reason for the unreasonable grade design,which cause shear strength not enough.In this paper,aceording to the early damage investigation program in high temperature and rainy asphalt pavement,combining with references,this paper systematically analyzes the early damage mechanism of asphalt pavement in order to obtain the main influencing factors,Taking"high temperature" "much rain" as the main line,taking "shear" as the basis,on the basis of typical gradation,taking filling theory,stacking theory,analytical theory and bulk mechanics as the theoretical basis,this paper design a new gradation scheme with shear modulus as the control index.Through triaxial compression test,orthogonal test and so on,the mixture proportion of new design gradation is determined.At the same time,the deformation resistance of asphalt pavement is analyzed directly and quantitatively by finite element software.And compared with the typical gradation design schemes,which in order to obtain the optimal design scheme and study the correlation key construction technology.The results of this paper can effectively reduce the pavement diseases such as rutting and water damage in high temperature and rainy areas,reduce the cost of maintenance and provide superior service level.Meanwhile,it can save the social resources,protect the ecological environment and the sustainable development of road construction.