There is temperature gradient in asphalt road surfaces. However, the present laboratory rut tests for single asphalt surface layer and asphalt surface course were carried out under uniform temperature condition. A control system was developed to generate temperature gradient in the rut sample, and a series of total-thickness laboratory rut tests was carried out using the temperature gradient control system. Test results show that the rutting resistance performance of the entire surface course under temperature gradient is superior to that under uniform temperature condition. The way by weakeni...
