期刊
CONSTRUCTION AND BUILDING MATERIALS
卷 286, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.conbuildmat.2021.122810
关键词
Asphalt; Aqueous solutions; Morphology; Structure; Components
资金
- National Key R&D Program of China [2017YFE0111600]
- Technological Innovation Major Pro-ject of Hubei Province [2019ACA147, 2019AEE023]
- National Natural Science Foundation of China [51778515]
This study evaluated the physicochemical properties of asphalt under different aqueous solutions, finding that aqueous solution can change the surface structure of asphalt and accelerate erosion. The impact of different aqueous solutions on asphalt erosion speed has a certain order.
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 (I-C=O) and sulfoxide index (I-S=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. (C) 2021 The Authors. Published by Elsevier Ltd.
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