Analytic solution of unstable state temperature field in asphalt pavement

It is necessary to calculate temperature field accurately in asphalt pavement with different climatic informations to prevent excessive rutting or fatigue cracks in asphalt pavements. It's also essential to design the suitable pavement structures and to choose grades of asphalt binder rightly. Based on the thermology theory, the mathematical equation of heat exchange in the asphalt pavement for two different seasons and the two-dimensional analytical model of unstable state temperature field in the asphalt pavement were established with explicit derivation. In order to understand the preliminary effect of different regions and climates on temperature fields in the asphalt pavement, the experimental validations were carried out. Meanwhile, the comparison between analytical results and the in-site data proofs the validation of analytical model. It shows that the simulation result is consistent with the experimental data well.