Flame Retardancy and Rheological Properties of Warm-Mix Rubber Asphalt Binder Containing Various Flame Retardants
Publication: Journal of Materials in Civil Engineering
Volume 36, Issue 9
Abstract
The application of warm-mix flame retardant rubber asphalt (WFRA) in tunnel pavement offers a promising solution that enhances both energy conservation and tunnel safety. First, a commercial halogen-free flame retardant (ZK), alumina trihydrate (ATH), and organic montmorillonite compound ATH flame retardant (OMMT/ATH) were melt-blended with warm-mix rubber asphalt (WRA) to prepare different types of WFRAs. Then, the effects of various flame retardants (FRs) on flame retardancy and rheological properties of the WRA were evaluated. Moreover, the functional groups of FR, WRA, and WFRA were investigated. Finally, the synergistic mechanism of FR on the WRA was explored based on the analysis of flame retardancy, rheological properties, and functional groups. Results show that the flame-retardant effect of OMMT/ATH on the WRA is much better than that of single FRs (ZK and ATH), indicating that the OMMT and ATH exhibit synergistic flame-retardant effect. The addition of OMMT/ATH enhances the high-temperature performance but shows little effect on the fatigue performance of the WRA. The synergistic flame-retardant mechanism of OMMT/ATH on the WRA is mainly attributed to the physical barrier effect of OMMT, the cooling and dilution effect of ATH, and the synergistic covering layer effect of OMMT and ATH.
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Data Availability Statement
Some or all data, models, or codes that support the findings of this study are available from the corresponding author upon reasonable request.
Acknowledgments
This work was financially supported by the Jilin Province Transportation Innovation Development Support (Science and Technology) Project (2021-1-6) and the Fundamental Research Funds for the Central Universities, CHD (300102212913). The authors gratefully acknowledge their financial support. Zhuang Wang: conceptualization, methodology, resources, writing–original draft, and writing–review and editing. Zhen-gang Feng: project administration and funding acquisition. Fengjie Cai: methodology, validation, and formal analysis. Kaixiang Zheng: investigation, writing–original draft, and formal analysis. Xinjun Li: supervision, project administration, and writing–review and editing.
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Information & Authors
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Published In
Journal of Materials in Civil Engineering
Volume 36 • Issue 9 • September 2024
Copyright
© 2024 American Society of Civil Engineers.
History
Received: Nov 22, 2023
Accepted: Feb 28, 2024
Published online: Jun 21, 2024
Published in print: Sep 1, 2024
Discussion open until: Nov 21, 2024
ASCE Technical Topics:
- Asphalt pavements
- Disaster risk management
- Disasters and hazards
- Engineering materials (by type)
- Fires
- Geotechnical engineering
- Infrastructure
- Man-made disasters
- Material mechanics
- Material properties
- Materials characterization
- Materials engineering
- Materials processing
- Pavements
- Rheology
- Rubber
- Transportation engineering
- Tunnels
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