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[会议论文]

Oxidative Aging Effects on Damage-Healing Performance of Unmodified and Polymer Modified Asphalt Binders

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Author:

Chen, Yifang (Chen, Yifang.) | Wang, Chao (Wang, Chao.) (Scholars:王超)

Indexed by:

CPCI-S Scopus

Abstract:

This paper investigates the damage-healing properties of unmodified and polymer modified asphalt binders under different aging levels using newly developed linear amplitude sweep based healing (LASH) test. One neat asphalt 70# and one Styrene-Butadiene-Styrene (SBS) modified asphalt are selected in this study. The original binders are subjected to the Rolling Thin Film Oven (RTFO) and Pressurized Aging Vessel (PAV) tests for stimulating the short- and long-term aging of asphalt binders during the pavement construction and service phases. Through the LASH tests under different aging levels of the two binders, it is found that the damage-healing performance of both neat and modified asphalt binders gradually decrease with the increasing aging levels. It is also observed that the healing performance of 70# neat asphalt is higher than that of SBS binder in pre-failure conditions, however, the healing behaviors of SBS binder is becoming obviously better than that of 70# binder after fatigue failure. Furthermore, a promising relationship is found between the macroscale healing properties of asphalt binders and their microscale chemical composition under various aging levels.

Keyword:

Asphalt Aging Healing Rheology Chemical composition

Author Community:

  • [ 1 ] [Chen, Yifang]Beijing Univ Technol, Dept Rd & Urban Railway Engn, Beijing 100124, Peoples R China
  • [ 2 ] [Wang, Chao]Beijing Univ Technol, Dept Rd & Urban Railway Engn, Beijing 100124, Peoples R China

Reprint Author's Address:

  • 王超

    [Wang, Chao]Beijing Univ Technol, Dept Rd & Urban Railway Engn, Beijing 100124, Peoples R China

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Source :

PROCEEDINGS OF THE 5TH INTERNATIONAL SYMPOSIUM ON ASPHALT PAVEMENTS & ENVIRONMENT (APE)

ISSN: 2366-2557

Year: 2020

Volume: 48

Page: 395-403

Language: English

Cited Count:

WoS CC Cited Count: 0

SCOPUS Cited Count: 3

30 Days PV: 2

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