LAUSR

Abstract Asphalt mastic is a key component affecting the performance of asphalt mixtures. Fibers can efficiently improve the performance of asphalt mastic. Four types of fibers, including two types of flocculent fibers (lignin fibers and sepiolite fibers) and two types of bundle fibers (basalt fibers and aramid fibers), were selected to study the effect of fiber morphology on the performance of asphalt mastic in this study. Firstly, the thermal stability, the asphalt absorption, and the microscopic morphology of various fibers were tested. Secondly, relevant performance tests, including penetration, softening point, bending beam rheometer test (BBR), and dynamic shear rheology test (DSR) test, were conducted on asphalt mastic samples prepared with various fibers. The results show that the flocculent and the bundle fibers played different roles in asphalt mastic. The flocculent fibers could stabilize asphalt, while the bundle fibers could enhance the toughness. The addition of fibers into asphalt mastic improved rutting resistance.