Durability Prediction of Asphalt Mixture under Freeze-Thaw Cycle Based on GM (1,N) Grey Model

In order to predict the durability of asphalt mixture under freeze-thaw cycles, the porosity and splitting strength of asphalt mixture under freeze-thaw cycle are studied, and GM(1, N) model in grey system theory is established. The results show that there is a good correlation between the porosity and the splitting strength in the durability factors of asphalt mixture. The value of the porosity increases with the increasing of the freeze-thaw times, and the value of the splitting strength decreased with the increasing of the freeze-thaw times. The GM(1, N) grey forecasting model can predict the porosity and the splitting strength well, and the calculated results agree well with the experimental data. Therefore, it is feasible to introduce the grey system theory in the prediction study of the durability of asphalt mixture.