Aging Characteristics of Rubber Modified Asphalts in Different Environmental Factors Combinations
Source abstract
Abstract
Two kinds of rubber modified asphalts were investigated and compared with virgin asphalt. In order to get closer to engineering practice, different combinations of four environmental factors were merged into the laboratory aging simulation. Subsequently, conventional property tests, including softening point, viscosity, creep stiffness, creep rate, and fatigue cracking were conducted on asphalt samples. The performance difference of asphalt before and after aging was selected as an evaluation index for asphalt aging degree. The results indicate that two kinds of rubber modified asphalts show stronger resistant ability to temperature deformation and better resistance to traffic loading than virgin asphalt in all kinds of environmental factors combinations. Tests on chemical analyses were conducted to investigate the asphalt aging characteristics. The apparent morphology of rubber modified asphalts are described in detail under an environment scanning electron microscope (ESEM). The damage condition reflected in images reveals the aging degree caused by multiple environmental factors. Moreover, the thermogravimetric analysis (TG) confirms that three kinds of asphalts can maintain thermal stability in various environments. Additionally, new characteristic functional groups were not detected in the infrared (IR) spectra of rubber modified asphalts, which means they have stable antioxidant properties given that their oxidation degrees change slightly throughout the aging processes.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Asphalt Pavement Performance Evaluation · Infrastructure Maintenance and Monitoring · Transport Systems and Technology
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
College of Civil Science and Engineering, Yangzhou University, Yangzhou 225009, Jiangsu, China
Department of Civil Engineering, Catholic University of America, 620 Michigan Ave NE, Washington, DC 20064, USA
Funding
National Natural Science Foundation Committee of China
References (22)
Show source-provided references
1. Polymer modified asphalt binders10.1016/j.conbuildmat.2005.07.007 ↗
2. Viscous properties, storage stability and their relationships with microstructure of tire scrap rubber modified asphalt10.1016/j.conbuildmat.2014.10.015 ↗
3. The effect of crumb rubber modifier (CRM) on the performance properties of rubberized binders in HMA pavements10.1016/j.conbuildmat.2007.04.010 ↗
4. Laboratory evaluation on high temperature viscosity and low temperature stiffness of asphalt binder with high percent scrap tire rubber10.1016/j.conbuildmat.2011.06.061 ↗
5. Investigation of the rheological modification mechanism of crumb rubber modified asphalt (CRMA) containing TOR additive10.1016/j.conbuildmat.2013.11.031 ↗
6. Ma, A. (2006). Research on Performance and cross Blend Mechanism of Microwave Radiant Crumb Rubber Modified Asphalt. [Master’s Thesis, Yangzhou University].
7. A review of the use of recycled solid waste materials in asphalt pavements10.1016/j.resconrec.2007.02.002 ↗
8. Effect of ageing on bitumen chemistry and rheology10.1016/S0950-0618(01)00033-2 ↗
9. Studies on the aging behavior of the Arabian asphalts10.1016/S0016-2361(99)00018-6 ↗
10. Investigation on physical and chemical parameters to predict long-term aging of asphalt binder10.1016/j.conbuildmat.2016.06.121 ↗
11. Controlling asphalt aging by inclusion of byproducts from red wine industry10.1016/j.conbuildmat.2011.08.092 ↗
12. Laboratory evaluation of antioxidants for asphalt binders10.1016/j.conbuildmat.2010.06.058 ↗
13. Wang, J. (2008). Study on Ageing Mechanism and Rheologic Behavior of Asphalt under Simulate Ultraviolet Environment, Harbin Institute of Technology.
14. The temperature effects in aging index of asphalt during UV aging process10.1016/j.conbuildmat.2015.05.022 ↗
15. Lv, W. (2001). Design Principle and Method of Asphalt Mixture, Tongji University Press. [1st ed.].
16. (2011). Standard Test Methods of Bitumen and Bituminous Mixtures for Highway Engineering (JTG E20-2011), China Communications Press.
17. Discussion on UV-light ageing characteristic and mechanism of asphalt
18. UV and thermal aging of pure bitumen-comparison between laboratory simulation and natural exposure aging10.1080/14680629.2008.9690161 ↗
19. Photodegradation test of asphalt binder using pressed thin film samples10.1139/l05-068 ↗
20. Experimental study of water aging on asphalt during service life of pavements
21. Solaimanian, M., Anderson, D., and Hunter, D. (2003). Evaluation of Vestenamer Reactive Modifier in Crumb Rubber Asphalt, Pennsylvania Transportation Institute.
22. The observation and analysis of the surface solar ultraviolet radiation in Shanghai