- ISSN 0258-2724
- CN 51-1277/U
- EI Compendex
- Scopus
- Indexed by Core Journals of China, Chinese S&T Journal Citation Reports
- Chinese S&T Journal Citation Reports
- Chinese Science Citation Database
| Citation: | LI Jin, SHI Yuefeng, XIAO Xin, LOU Liangwei, CAI Degou, XIAO Feipeng. Freeze-Thaw Damage Evolution Model of Asphalt Concrete for Waterproofing Layer in High-Speed Railways[J]. Journal of Southwest Jiaotong University, 2024, 59(2): 281-288. doi: 10.3969/j.issn.0258-2724.20220335
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The freeze-thaw damage evolution of asphalt concrete for waterproofing layer in high-speed railways (shorted as railway asphalt concrete) was investigated. Four kinds of composite polymerized railway asphalt concrete were prepared with different asphalt binders and aggregate gradations, and the deterioration of macro mechanical properties in multiple temperature domains under repeated freeze-thaw cycles was evaluated. Models of freeze-thaw damage evolution for railway asphalt concrete were constructed, and the damage degree under the action of repeated freeze-thaw cycles was calculated. The results show that the retained rate of mechanical properties of the four kinds of railway asphalt concrete is still above 80% after 10 freeze-thaw cycles. The low-temperature fracture energy index is the most sensitive to freeze-thaw cycles, which can timely reflect the deterioration of mechanical properties of railway asphalt concrete. The goodness of fit of all freeze-thaw damage evolution models for railway asphalt concrete that are constructed through statistical reliability theory is nearly 0.99.
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