Analysis Of Affect Factors On High Temperature Deformation Of Asphalt Mixture Based On The Burgers Model

Asphalt pavement is a flexible pavement structure, because of its driving comfort, good continuity of structural features in highway construction has been widely used. Asphalt as a viscoelastic material force, diversity in the external factors affecting the joint action, with the increase in the number of loads, structural strength gradually decreased, at high temperature the formation of ruts, which seriously affected the stability of road traffic and comfort. Permanent deformation of the road pavement engineering has been the focus of the study.In this paper, the current forecast track deformation methods were summarized and analyzed. On this basis, BURGERS viscoelastic model based on the theory, consider the process of using the road the role of dynamic load characteristics, the use of integral-type constitutive equation established the asphalt mixture rutting rutting plate deformation of the specimen temperature integral calculation method, and by their significant type expression.The dense-graded AC-13 asphalt mixture rutting performance were tested, according to the indoor test track to test the value of the deformation is derived viscoelastic parameters calculated, using linear regression analysis method to the viscoelastic model parameters BURGERS was fitting recognition of the correctness of this method was validated analysis. Wired difference method using a simulation analysis of rutting test by comparing test results with the experimental analysis show that the established method for describing the high temperature deformation of asphalt mixture performance is applicable. Calculated using this method of visco-elastic parameters can well predict the high-temperature asphalt rutting deformation.Using the finite difference method for asphalt mixture rutting deformation temperature factors are analyzed for different load levels, the effective load time and pavement structure parameters of the mixture law of development of high-temperature deformation of track for a comparative analysis shows that semi-rigid and flexible base structure has better heat resistance than rutting performance.