Liu Hao, Li Yunyu, Li Jixin, Wang Feng, Peng Longfan, Li Chao, Wang Tianlei, Lin Juntao
China Construction Second Engineering Bureau Ltd., Beijing 100176, China.
State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, China.
Materials (Basel). 2023 Jan 5;16(2):549. doi: 10.3390/ma16020549.
Fiber can absorb asphalt binder and therefore reinforce and stabilize the asphalt mixture structure and also prevent the asphalt from the leaking, which occurs in the process of mixing and transport. In this study, three kinds of fiber (polyester fiber, polypropylene fiber, and lignin fiber) are used to evaluate the relationship between the fiber types and mechanic performance of SMA-13 fiber asphalt mixture, which is specially designed for field tests of high-speed vehicles on pavements. The micro-surface characteristics of fiber and aggregates were studied by SEM and image analysis. Marshall stability and splitting strength were used to measure the properties of the asphalt mixture. In addition, a field test, including measures for curve-section edge, curve-section center, straight-section edge, and straight-section center, was conducted to evaluate the skid resistance of the high-speed vehicles that test field pavement. The results show that the Marshall stabilities of asphalt mixture with three kinds of fibers have been improved, whereas the stability of asphalt mixture prepared by polypropylene fiber and polyester fiber particularly increased before immersion. Among the three kinds of fiber asphalt mixtures, the polyester fiber asphalt mixture has enhanced water susceptibility. Skid resistance in the field test indicated that high skid resistance and good surface-texture depth were achieved.
纤维能够吸收沥青结合料，从而增强并稳定沥青混合料结构，还能防止沥青在搅拌和运输过程中出现泄漏。在本研究中，使用了三种纤维（聚酯纤维、聚丙烯纤维和木质素纤维）来评估纤维类型与SMA - 13纤维沥青混合料力学性能之间的关系，该混合料是专门为高速车辆在路面上的现场试验设计的。通过扫描电子显微镜（SEM）和图像分析研究了纤维和集料的微观表面特性。采用马歇尔稳定度和劈裂强度来测定沥青混合料的性能。此外，还进行了一项现场试验，包括对弯道边缘、弯道中心、直道边缘和直道中心的测量，以评估试验场路面上高速车辆的抗滑性能。结果表明，含三种纤维的沥青混合料的马歇尔稳定度均有所提高，而由聚丙烯纤维和聚酯纤维制备的沥青混合料在浸水前稳定性尤其增加。在三种纤维沥青混合料中，聚酯纤维沥青混合料的水稳定性增强。现场试验中的抗滑性能表明，实现了高抗滑性和良好的表面纹理深度。
