Study of Temperature Field Variation of Cement Concrete Pavement

To study the variation of temperature field of cement concrete pavement on sunny days, the research was carried out based on the long-term monitoring data of test road. The sunny temperature data were screened by daily temperature amplitude and correlation coefficient. Taking the daily temperature change as the analysis unit and considering the annual cycle variation of the solar radiation angle, a sunny air temperature model was established. On this basis, considering the attenuation and hysteresis of heat transfer as well as the equilibrium of rising and cooling time along the road depth, the sunny temperature field model of cement concrete pavement was established. The results show that a statistical method based on the air temperature amplitude and correlation coefficient can effectively screen out sunny temperature data in measured data, and the road temperature field model established can accurately indicate the three-dimensional variation law of the temperature of cement concrete pavement with time and depth. The deviation analysis shows that the pavement temperature model reflects the diurnal and seasonal variation characteristics of the road temperature field. The research results can be used as the basis for the research on temperature fatigue stress of cement concrete pavement and the optimisation design of pavement structure.