ORIGINAL RESEARCH article
Front. Built Environ.
Sec. Construction Materials
Volume 11 - 2025 | doi: 10.3389/fbuil.2025.1670013
This article is part of the Research TopicAdvancements and Applications of Balanced Mix Design (BMD) In Asphalt Pavement Engineering: Towards Sustainable And Resilient InfrastructureView all 6 articles
Research on pavement performance of lignin fiber toughened foam asphalt cold recycled mixes
Provisionally accepted
- 1Mechanization Engineering Co. Ltd., China Railway No. 5 Engineering Group Co., Ltd., Hengyang, China
- 2School of Transportation, Changsha University of Science and Technology, Changsha, China
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In order to improve the pavement performance and toughness of foam asphalt cold recycled mixture (FACRM), the effects of lignin fiber on the pavement performance of FACRM at 0%, 0.3%, 0.6% and 0.9% dosage (relative to foam asphalt cold recycled mixtures) were investigated. Through the high temperature rutting, semi-circular bending and freeze-thaw splitting tests, the influence of different fiber dosage on the performance of FACRM was investigated, and the microscopic morphology of the fiber on the FACRM damage interface was observed by scanning electron microscope (SEM). The results show that: with the increase of lignin fiber dosage, the maximum dry density of FACRM shows a decreasing trend, the optimum moisture content and the optimum asphalt content gradually increase; dynamic stability, fracture energy and tensile strength ratio (TSR) show a pattern of change that first increases and then decreases; the fiber enhancement mechanism of FACRM pavement performance is that its dispersion of the bridge in the mixture to form the three-dimensional network structure plays the role of reinforcement. Comprehensive lignin fiber on the recycled mixture pavement performance and microscopic morphology of the results, the recommended use of its dosage of 0.3%.
Keywords: Cold recycled asphalt mixtures, Foam asphalt, Pavement performance, Lignin fiber, Reinforcement
Received: 22 Jul 2025; Accepted: 25 Aug 2025.
Copyright: © 2025 Zhang, Zhao, Wang, Jin and Chen. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
* Correspondence: Ya Nan Zhao, School of Transportation, Changsha University of Science and Technology, Changsha, China
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