Effects and Reaction Mechanism of Acid Rain on the Pavement Performance of Asphalt Mixtures with Steel Slag Aggregates
AbstractAcid rain has detrimental effects on the pavement performance of asphalt mixtures. This research investigated the effects of acid-rain immersion on the physical properties and pavement performance of rubber asphalt mixtures containing steel slag; the mechanism behind these effects was also determined. A simulated acid-rain-immersion experiment was designed based on changes in the air voids and Marshall stabilities of the mixtures. Penetration, softening-point, ductility, and viscosity tests evaluated the physical properties of rubber asphalt after acid rain erosion. Rutting, low-temperature bend, and freeze–thaw splitting tests also were conducted. The mechanisms by which acid rain immersion impact the rubber asphalt mixtures containing steel slag were studied via Fourier-transform infrared spectroscopy, atomic force microscopy, and scanning electron microscopy. The results revealed that the rubber asphalt becomes brittle and hard after acid rain immersion due to its lightweight components being converted into heavier components due to rubber degradation and asphalt oxidization. Acid rain also reduced the adhesion between the asphalt binder and aggregates by eroding the asphalt film and reacting with components in the steel slag. The results of this research provide reference information for the application of steel slag asphalt mixture in areas affected by acid rain.
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/issn/08991561
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Supplemental Notes:
- © 2022 American Society of Civil Engineers 2022
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Authors:
- Wu, Hansong
- Shen, Aiqin
- Chen, Xiang
- He, Ziming
- Ren, Guiping
- Yao, Chao
- Publication Date: 2022-10
Language
- English
Media Info
- Media Type: Web
- Pagination: 04022272
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Serial:
- Journal of Materials in Civil Engineering
- Volume: 34
- Issue Number: 10
- Publisher: American Society of Civil Engineers
- ISSN: 0899-1561
- EISSN: 1943-5533
- Serial URL: http://ascelibrary.org/journal/jmcee7
Subject/Index Terms
- TRT Terms: Acid rain; Asphalt mixtures; Asphalt rubber; Pavement performance; Physical properties; Slag coarse aggregates
- Subject Areas: Highways; Maintenance and Preservation; Materials; Pavements;
Filing Info
- Accession Number: 01858139
- Record Type: Publication
- Files: TRIS, ASCE
- Created Date: Sep 20 2022 2:33PM