Fatigue Behavior of Asphalt-rubber Binders Modified With Shale-oil Residue

This work aims at evaluating the effects of the proportions of crumb rubber and shale-oil residue on the fatigue parameter G*sin delta. Eight asphalt binders were submitted to short- and long-term aging and then tests in the oscillatory-shear mode were performed. Based on regression models, response trace plots, and contour plots were made. Both rubber and oil reduce the G*sin delta parameter, increasing the controlled-mode fatigue resistance. As the test temperature decreases, the intensity of the effects of rubber and oil on G*sin delta increases and the number of mixtures that meet the Superpave limit of 5.0 MPa reduces.