Heat Reflectivity Properties of Asphalt Mixtures Modified with Nano A/SBS-II: Prediction of Temperature in Asphalt Pavement

Test results of heat reflectivity for asphalt that is modified with nano A/SBS are given by the authors in part I, and are used directly to predict the temperature in asphalt pavement. Firstly, the heat reflectivity is defined by using the temperature increment between the stable value between the modified asphalt and the base asphalt. Then, a two-dimensional finite element model is developed to model a common multilayered pavement and a reflective multilayered pavement under various environmental conditions. Meteorological data, such as air temperature, solar radiation and wind speed etc., are obtained from Ningbo weather stations. Finally, the distribution of temperature in both the reflective pavement and the common asphalt pavement is calculated and compared. It is indicated that the temperature in the reflective asphalt pavement is lower than that of the common asphalt pavement. As a result, the temperature fatigue of the asphalt pavement can be lowered and thus the pavement's life prolonged.