Effects of polyacrylonitrile fibres and high content of RAP on mechanical properties of asphalt mixtures in binder and base layers

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Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2023
Major/Subject
Mcode
Degree programme
Language
en
Pages
23
2133-2155
Series
Road Materials and Pavement Design, Volume 24, issue 9
Abstract
In this present study, the effects of polyacrylonitrile fibres and high content (50%) of Reclaimed Asphalt Pavement (RAP) on the mechanical properties of asphalt mixtures in binder and base layers were studied. This is the first time that the effect of high RAP content on the mechanical properties of fibre reinforced asphalt mixtures (FRAM) was evaluated, while the low temperature performance was not usually conducted in previous studies. Results indicated that the addition of polyacrylonitrile fibres worsens the moisture susceptibility resistance, but improves the rutting, stiffness properties, fatigue performances, and cumulative fatigue damage of the mixtures with and without RAP. No significant effects on the low temperature cracking resistance were found when fibre was used, while a remarkable improvement in the crack propagation resistance properties was observed. Therefore, the use of polyacrylonitrile fibres improves in general the mechanical responses of the mixture, especially in the stiffness response.
Description
Publisher Copyright: © 2022 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group.
Keywords
Fibers reinforced asphalt mixture, polyacrylonitrile fibres, RAP, mechanical properties, HOT-MIX ASPHALT, PERFORMANCE, PAVEMENT, POLYMER
Other note
Citation
Riccardi , C , Wang , D , Wistuba , M P & Walther , A 2023 , ' Effects of polyacrylonitrile fibres and high content of RAP on mechanical properties of asphalt mixtures in binder and base layers ' , Road Materials and Pavement Design , vol. 24 , no. 9 , pp. 2133-2155 . https://doi.org/10.1080/14680629.2022.2117072