Evaluation of Aging Resistance of Graphene Oxide Modified Asphalt
Abstract
:1. Introduction
2. Materials and Methods
2.1. Materials
2.1.1. Asphalt
2.1.2. Graphene Oxide
2.2. Preparation of GO Modified Asphalt
2.3. Microstructure of GO
2.4. Evaluation of Anti-Aging Performance
2.4.1. Aging Procedures
2.4.2. Physical Performance Tests
2.4.3. Characteristic Functional Group Test
2.4.4. Rheological Property Test
3. Results and Discussion
3.1. Characterization of the GO
3.2. UV Aging Resistance Performance
3.2.1. Chemical Structure
3.2.2. Physical Performance
3.2.3. Evaluating the Rheological Properties
4. Conclusions
- Before aging, the GO could decrease the G* and slightly change the δ of 90 A and SBS MA; in total, a smaller G*sinδ value was obtained after being modified by the GO, which shows that the GO could improve the fatigue cracking resistance performance of the 90 A and SBS MA binders.
- According to the rheological property testing, before and after TFOT, the GO could improve the thermo-oxidative aging resistance performance of 90 A and SBS MA, and the improvement effect of the GO on 90 A was better than SBS MA.
- After UV aging, the IC=O and IS=O increment of the GO modified asphalt were smaller than that of the asphalt without GO. The GO could retard the formations of the carbonyl and sulfoxide groups during UV aging, and decrease the aging degree of 90 A and SBS MA.
- After UV aging, the GO could increase the PRR and DRR of 90 A and SBS MA, meanwhile decreasing the SPI and VAI; the order of the G* was 3% GO-modified asphalt < 1% GO-modified asphalt < 90 A (or SBS MA). The increment of G* was obviously decreased after adding the GO, and the fatigue cracking resistance performance of GO-modified asphalt were better than that of the asphalt without the GO. The results showed that the GO could improve the stability of the asphalt physical performance. The GO could improve the UV aging resistance performance of 90 A and SBS MA obviously, and the improvement effect of the 3% GO was better than that of 1% GO.
Acknowledgments
Author Contributions
Conflicts of Interest
References
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Asphalt | Technical Parameters | Unit | Test Results | Method |
---|---|---|---|---|
90 A | 25 °C Penetration | 0.1 mm | 84.6 | ASTM D5 [17] |
Softening point | °C | 47.8 | ASTM D36 [18] | |
10 °C ductility | cm | >100 | ASTM D113 [19] | |
60 °C viscosity | Pa⋅s | 206 | ASTM D4402 [20] | |
SBS MA | 25 °C Penetration | 0.1 mm | 62.3 | ASTM D5 [17] |
Softening point | °C | 57.5 | ASTM D36 [18] | |
5 °C ductility | cm | 55.8 | ASTM D113 [19] | |
135 °C viscosity | Pa⋅s | 1.337 | ASTM D4402 [20] |
Aging Degree | Virgin | TFOT Aging | UV Aging | ||||||
---|---|---|---|---|---|---|---|---|---|
GO content (%) | 0 | 1 | 3 | 0 | 1 | 3 | 0 | 1 | 3 |
FFT (°C) | 16.5 | 16.5 | 15.8 | 19.3 | 16.7 | 18.8 | 20.6 | 19.2 | 19.0 |
Aging Degree | Virgin | TFOT Aging | UV Aging | ||||||
---|---|---|---|---|---|---|---|---|---|
GO content (%) | 0 | 1 | 3 | 0 | 1 | 3 | 0 | 1 | 3 |
FFT (°C) | 16.8 | 16.6 | 15.8 | 19.3 | 19.8 | 19.1 | 21.4 | 20.6 | 20.1 |
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Wu, S.; Zhao, Z.; Li, Y.; Pang, L.; Amirkhanian, S.; Riara, M. Evaluation of Aging Resistance of Graphene Oxide Modified Asphalt. Appl. Sci. 2017, 7, 702. https://doi.org/10.3390/app7070702
Wu S, Zhao Z, Li Y, Pang L, Amirkhanian S, Riara M. Evaluation of Aging Resistance of Graphene Oxide Modified Asphalt. Applied Sciences. 2017; 7(7):702. https://doi.org/10.3390/app7070702
Chicago/Turabian StyleWu, Shaopeng, Zhijie Zhao, Yuanyuan Li, Ling Pang, Serji Amirkhanian, and Martin Riara. 2017. "Evaluation of Aging Resistance of Graphene Oxide Modified Asphalt" Applied Sciences 7, no. 7: 702. https://doi.org/10.3390/app7070702