Shu Benan, Bao Shiwen, Wu Shaopeng, Dong Lijie, Li Chao, Yang Xu, Norambuena-Contreras José, Liu Quantao, Wang Qing
State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, China.
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.
Materials (Basel). 2019 Apr 17;12(8):1266. doi: 10.3390/ma12081266.
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.
近年来，通过提高沥青的自愈合能力来延长沥青混合料使用寿命的想法受到了广泛关注。鉴于此，本研究合成了三种胶囊型再生剂纤维以改善沥青混合料的自愈合性能。进行了一系列表征以研究这三种纤维的形态、化学结构和热稳定性。随后，研究了含纤维沥青混合料的路用性能，包括高低温性能、水敏感性和疲劳性能。最后，通过三点弯曲试验研究了含纤维沥青混合料的自愈合性能。结果表明，成功合成了三种胶囊型再生剂纤维。这些纤维具有优异的热稳定性，满足沥青混合料拌和与压实过程中的温度要求。含纤维沥青混合料的路用性能满足要求。含纤维沥青混合料的自愈合能力得到提高。温度与再生剂的协同作用可进一步显著提高沥青混合料的自愈合能力。
