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Effect of different aqueous solutions on physicochemical properties of asphalt binder

Journal Article (2021)
Author(s)

Yingxue Zou (Wuhan University of Technology)

Serji Amirkhanian (University of South Alabama)

S. Xu (TU Delft - Materials and Environment)

Yuanyuan Li (Wuhan University of Technology)

Yafei Wang (Wuhan University of Technology)

Jianwei Zhang (Wuhan University of Technology)

Research Group
Materials and Environment
Copyright
© 2021 Yingxue Zou, Serji Amirkhanian, S. Xu, Yuanyuan Li, Yafei Wang, Jianwei Zhang
DOI related publication
https://doi.org/10.1016/j.conbuildmat.2021.122810
More Info
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Publication Year
2021
Language
English
Copyright
© 2021 Yingxue Zou, Serji Amirkhanian, S. Xu, Yuanyuan Li, Yafei Wang, Jianwei Zhang
Research Group
Materials and Environment
Volume number
286
Pages (from-to)
1-12
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Abstract

Aqueous solution is one of the main factors of asphalt pavement disease. However, the physicochemical changes of asphalt are ambiguous during immersion in different aqueous solutions. This study evaluated the physicochemical properties of asphalt under the action of different aqueous solutions to further understand the mechanism of moisture erosion. The morphology, chemical structure and four components of asphalt were observed after immersion, while the pH value, total organic carbon (TOC) and characteristic functional groups of residual solutions were monitored. The test results showed that aqueous solution could change the bee structure on the asphalt surface and increased the mean roughness. The carbonyl index (IC=O) and sulfoxide index (IS=O) of asphalt increased with immersion time. And the asphaltenes of asphalt fluctuated and eventually increased during immersion. Solute could accelerate the erosion on asphalt through interaction, the degree of which increased in the order, Na2SO4 saline < NaCl saline < pH 3 acid < pH 11 alkali.