Investigation of the moisture damage and the erosion depth on asphalt

Journal article (2023)

Authors

Yingxue Zou Wuhan University of Technology
Haiqin Xu Wuhan University of Technology
S. Xu Wuhan University of Technology, Materials and Environment - CEG
Anqi Chen Wuhan University of Technology
Shaopeng Wu Wuhan University of Technology
Serji Amirkhanian University of South Alabama
Pei Wan Wuhan University of Technology
Xiang Gao Wuhan University of Technology
Research Group
Materials and Environment (CEG) (TU Delft)
Copyright: © 2023 Yingxue Zou, Haiqin Xu, S. Xu, Anqi Chen, Shaopeng Wu, Serji Amirkhanian, Pei Wan, Xiang Gao
DOI
help_outline
https://doi.org/10.1016/j.conbuildmat.2023.130503
Moisture damage Asphalt Diffusion coefficient Rheological property Adhesion property Erosion depth
More Info
expand_more

Published Date

2023

Language

English

Reuse Rights

Other than for strictly personal use, it is not permitted to download, forward or distribute the text or part of it, without the consent of the author(s) and/or copyright holder(s), unless the work is under an open content license such as Creative Commons.

Faculty

Civil Engineering & Geosciences

Department

Materials- Mechanics- Management & Design

Research Group

Materials and Environment

Abstract

Moisture erosion is one of the key factors leading to asphalt pavement damage, and the erosion depth indicates the moisture damage level but it is usually neglected. In order to study the moisture erosion and the erosion depth, this study characterized the chemical structure, rheological property and adhesion property of asphalt at different depths after immersion for different periods. To further explore the diffusion mechanism of eroded asphalt, a Log-log numerical model was established based on the Fick's second law to calculate the diffusion coefficient throughout the depth. The results indicate that it takes just four hours for water to penetrate a 25 μm asphalt film. The relation between erosion depth and immersion period presents three stages, and the process can be fitted with a polynomial model. At the macroscopic level, there is a lag between the changes in adhesion property with chemical structure and rheological property. Additionally, the periodicity of moisture erosion process was verified by the calculation of diffusion factor. In summary, the diffusion mechanism of eroded asphalt by moisture can provide a theoretical basis for the development of laboratory moisture erosion test specification, thus avoiding the waste of raw materials.