Characterization and mechanism of road performance of fiber-reinforced high modulus asphalt mixture

被引：0
|
作者：
Du, Yinfei [1 ]
Xu, Junquan [1 ]
Wang, Zhijie [1 ]
Ma, Cong [2 ]
Deng, Haibin [3 ]
机构：
[1] School of Civil Engineering, Central South University, Changsha,410075, China
[2] Institute of Urban Smart Transportation & Safety Maintenance, Shenzhen University, Shenzhen,518060, China
[3] Highway and Transportation Administration Center of Huzhou, Huzhou,313000, China
来源：
Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology) | 2024年 / 55卷 / 10期
关键词：
High modulus asphalt mixture has excellent high-temperature performance and fatigue resistance performance; but the low-temperature performance needs to be enhanced. For this reason; polyester fiber and basalt fiber were used to improve the performance of high modulus asphalt mixture. Asphalt mixtures with different fiber contents were prepared by single blending and compound blending; and the road performance was analysed by using wheel tracking test; low-temperature bending test and semi-circular fatigue test; the mechanism of fiber action in asphalt mastic was also revealed by multiple stress creep recovery test; bending beam rheometer test and scanning electron microscope microscopic characterization of low-temperature trabecular section. The results show that the compounding of fiber can significantly improve the dynamic stability; low-temperature failure strain and fatigue life of high modulus asphalt mixture. Under the condition that the mass ratio of basalt fiber to polyester fiber is 1:2; the dynamic stability; low-temperature failure strain; and fatigue life(stress ratio of 0.4) of high modulus asphalt mixture are increased by 61.7%; 49.2%; and; 200.0%; respectively; the nonrecoverable creep compliance (3.2 kPa) of high modulus asphalt mastic is reduced by 63.0%; and its creep rate (−12 ℃) is increased by 9.0%. Compounding of fiber can give full play to the basalt fiber rigidity and polyester fiber flexibility; strong fiber network can effectively transmit and disperse the asphalt mixture of the internal stress. Therefore; it is recommended to use compounding of basalt fiber and polyester fiber for the performance optimization of the high modulus asphalt mixture. © 2024 Central South University. All rights reserved;
D O I：
10.11817/j.issn.1672-7207.2024.10.023
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页码：3898 / 3908
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