Low temperature performances of fiber-reinforced asphalt mixtures for surface, binder, and base layers

• DOI: 10.1016/j.coldregions.2022.103738
• Publication Date: 2022-12-01T18:34:59Z
• Authors: Chiara Riccardi; Irune Indacoechea; Di Wang; Pedro Lastra-Gonz...; Augusto Cannone F...; Daniel Castro-Fresno
• Keywords: Polyacrylonitrile; Aramid

In the present study, effects of adding fibers and Reclaimed Asphalt Pavement (RAP) on low temperature performances open graded asphalt mixtures for surface layer dense surface, binder, base layers were investigated. Two different kinds used: a combination aramid polyolefins utilized preparing fiber reinforced porous mixtures, while polyacrylonitrile employed producing conventional layers. Reference made with virgin materials as benchmark to study fibers' addition. Moreover, composed 30% RAP binder containing 50% produced combined temperature's performance. Thermal Stress Restrained Specimen, Uniaxial Tension Stress, Semi-Circular Bending tests used evaluate response against thermal distresses. The addition showed no significant strength, remarkable improvement in failure crack propagation resistance properties was found. use has also shown be beneficial designed higher content suggesting dedicated mix design future research.