Fatigue Performance of Asphalt Mixtures with Different Design Goals

Abstract:

10 kinds of asphalt mixtures, including base asphalt and the commonlyused modified asphalt, were researched by fatigue tests by taking selfhealing into account, where fourpoint bending beam(4PB) was selected, at the temperature of 15 ℃ with 1 500×10-6 strain, as well as the second fatigue tests were performed, therefore, the effect of the modified asphalt was considered. Researches were carried out in the same asphalt content, the same volume design goal, fatigue performance were compared, and the same temperature performance classification, the fatigue performance was graded, which was a kind of bidirectional hierarchical method, providing reference for the design of asphalt mixture in the actual project. Finally, a partition scatterplot was drafted for mix design reference based on the test results.

Key words:modified asphalt; mixture design; fatigue performance; selfhealing