Print Email Facebook Twitter Unraveling the influence of fibers on aging susceptibility and performance of high content polymer modified asphalt mixtures Title Unraveling the influence of fibers on aging susceptibility and performance of high content polymer modified asphalt mixtures Author Lin, P. (TU Delft Pavement Engineering; Research Institute of Highway Ministry of Transport) Liu, X. (TU Delft Pavement Engineering) Ren, S. (TU Delft Pavement Engineering) Li, Yi (TU Delft Pavement Engineering) Xu, Jian (Research Institute of Highway Ministry of Transport) Li, Mingliang (Research Institute of Highway Ministry of Transport) Date 2023 Abstract High-Content SBS Polymer Modified Asphalt Mixtures (HCPMA) combined with fibers have gained popularity in porous pavement construction due to their superior performance. Although the aging behavior of HCPMA has been extensively studied, the impact of fibers on performance and aging susceptibility remains unclear. This research investigates the influence of two representative fibers (lignin and polyester) on the raveling, cracking, fatigue, and rutting resistance of HCPMA before and after aging using Cantabro loss tests, SCB strength tests, SCB fatigue tests, and Hamburg Wheel-Tracking tests. The results indicate that in the original state, polyester fiber slightly enhances HCPMA performance, while lignin fiber shows limited or even adverse effects on cracking, raveling, fatigue, and rutting resistance. However, both fibers exhibit a more pronounced enhancement effect after short- and long-term aging. FTIR analysis reveals that fiber addition does not significantly impact bitumen oxidation and polymer degradation. The excellent properties of High-Content SBS Polymer Modified Bitumen (HCPMB) in the original state create a "masking" effect that conceals the enhancement effect of fibers, which becomes more evident after long-term aging. Consequently, it is recommended that the performance evaluation and design of open-graded asphalt mixtures containing HCPMB be based on post-aging performance. Subject Porous asphaltHigh content polymer modified asphaltmixturesAging resistancePolyester fiberLignin fiber To reference this document use: http://resolver.tudelft.nl/uuid:5023ecef-1246-4915-bc94-64f61bd4dae2 DOI https://doi.org/10.1016/j.cscm.2023.e02211 ISSN 2214-5095 Source Case Studies in Construction Materials, 18 (e02211), 1-16 Part of collection Institutional Repository Document type journal article Rights © 2023 P. Lin, X. Liu, S. Ren, Yi Li, Jian Xu, Mingliang Li Files PDF 1_s2.0_S2214509523003911_main.pdf 4.04 MB Close viewer /islandora/object/uuid:5023ecef-1246-4915-bc94-64f61bd4dae2/datastream/OBJ/view