ABSTRACT
The stability of fibers and the influence of hybrid fibers on rheological properties of asphalt mortar were focused on. The changing of mass and fracture strength of the fibers before and after high temperature were evaluated. Then, the rheological properties of asphalt mortar with basalt fiber and steel wool fiber were investigated. The results indicate that the steel wool fiber is most stable, followed by basalt fiber and polyester fiber. Moreover, the hybrid fibers contribute to the increment of complex modulus, while the results of phrase angle show a severe separation between fibers and bitumen with the temperature increasing. Finally, the results demonstrate the hybrid fibers contribute to rutting resistance while the fatigue resistance is hard to evaluate.
