Abstract
The utilization of reclaimed asphalt pavement (RAP) contributes significantly to reducing resource waste and protecting the environment. However, due to the performance of rejuvenator, fatigue cracking has always been one of the important constraint on the development of the reclaimed asphalt pavements. Based on the studies previously conducted by our group, this paper investigated the fatigue properties of waste rubber/oil (WRO) rejuvenated asphalt and common rejuvenated asphalt by dynamic shear rheometer test (DSR), and analyzed the relationship between fatigue life and rheological properties of rejuvenated asphalt. The results indicated that the fatigue life of WRO rejuvenated asphalt is comparatively better than that of common rejuvenated asphalt. Affected by the of waste tire crumb rubber (WTCR), the increase of the proportion of waste tire crumb rubber (WTCR) can improve the elastic recovery ability of rejuvenated asphalt. The fatigue life of rejuvenated asphalt is susceptible to the rate of phase angle change, and the lower the viscoelasticity change rate, the better the fatigue life. There is no obvious direct relationship between the fatigue life of rejuvenated asphalt and the complex modulus.
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