Study on change discipline of rutting-test curve

This study developed a rut prediction model for bituminous pavement based on long-term rut test. During the development of the rut prediction model, the long-term rut tests curves were obtained by testing asphalt samples with their performance in extension test time. Then, the numerical analysis of the curves had been done by using the Microsoft-Excel. The numerical analysis results indicated that there was completely non-linear relation between the rut depth and time in the conventional one-hour time test, but with the test time exceeding two hours, the comparatively stable linear relation was gradually obvious. From this study, it was concluded that the regression equations by using the 2-3 hours tests data could be as the theoretical basis of the rut prediction model for bituminous pavement.