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Synthesis and Effect of Encapsulating Rejuvenator Fiber on the Performance of Asphalt Mixture

1
State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, China
2
State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, and School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China
3
Department of Civil Engineering, Monash University, Clayton, VIC 3800, Australia
4
LabMAT, Department of Civil and Environmental Engineering, University of Bío-Bío, Concepción 4030000, Chile
*
Authors to whom correspondence should be addressed.
Materials 2019, 12(8), 1266; https://doi.org/10.3390/ma12081266
Received: 23 March 2019 / Revised: 12 April 2019 / Accepted: 16 April 2019 / Published: 17 April 2019
(This article belongs to the Special Issue Sustainable Designed Pavement Materials)
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Abstract

The idea of prolonging the service life of asphalt mixture by improving the self-healing ability of asphalt has received extensive attention in recent years. In view of this, this work synthesized three kinds of encapsulating rejuvenator fibers to improve self-healing properties of asphalt mixtures. A series of characterizations were performed to study the morphology, chemical structure and thermal stability of the three kinds of fibers. Subsequently, the road performance of asphalt mixture containing the fiber were investigated, which included high and low temperature, water sensitivity and fatigue performances. Finally, the self-healing performance of asphalt mixture containing the fiber was investigated by 3PB test. The results revealed that the three kinds of encapsulating rejuvenator fibers were successfully synthesized. The fibers had excellent thermal stability, which met temperature requirements in the mixing and compaction process of asphalt mixtures. Road performance of asphalt mixture containing the fiber met the requirements. Self-healing ability of asphalt mixture containing the fiber was improved. Synergistic action of temperature and rejuvenator could further significantly improve the self-healing ability of the asphalt mixture. View Full-Text
Keywords: asphalt mixture; encapsulated rejuvenator; road performance; self-healing asphalt mixture; encapsulated rejuvenator; road performance; self-healing
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Shu, B.; Bao, S.; Wu, S.; Dong, L.; Li, C.; Yang, X.; Norambuena-Contreras, J.; Liu, Q.; Wang, Q. Synthesis and Effect of Encapsulating Rejuvenator Fiber on the Performance of Asphalt Mixture. Materials 2019, 12, 1266.

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