Fatigue Performance Evaluation of Bitumen with Controlled Stress DSR Test

Abstract

The forming of pavement structure relies mainly on the bonding aggregate by bitumen cement in bitumen mixture. The bitumen and Bitumen mortar under load are the main body subjected to tensile stress and strain of bitumen pavement, so the fatigue performance of bitumen mixture are directly influenced by the anti- fatigue performance of bitumen. In this paper, based on the time sweep mode of DSR, the fatigue test with controlled stress are carried out on the70#ordinary bitumen and SBS modified bitumen, and the fatigue performance of the two kinds of bitumen is evaluated based on 50% * 0 G .