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ORIGINAL RESEARCH article

Front. Mater.

Sec. Structural Materials

Volume 12 - 2025 | doi: 10.3389/fmats.2025.1704032

Experimental-numerical investigation on the performance of basalt fiber reinforced asphalt mixture

Provisionally accepted
Zizhou  XueZizhou Xue1Shizheng  FangShizheng Fang1Liwei  XiongLiwei Xiong2Jie  MaJie Ma3Ming  WangMing Wang2Bowei  SunBowei Sun2Kun  WuKun Wu2*
  • 1MCC Group Central Research Institute of Building and Construction Co Ltd, Beijing, China
  • 2Civil Aviation University of China, Tianjin, China
  • 3CNPC East China Design Institute CO. LTD., Qingdao, China

The final, formatted version of the article will be published soon.

Asphalt mixture stands as one of the extensively utilized materials within the realm of road engineering. Fibers have the remarkable ability to substantially enhance the road performance of asphalt mixtures. The influence of fibers on the physical and mechanical properties of asphalt mixtures, along with the microscopic strengthening mechanism, has drawn the attention of numerous scholars. In this research, the basalt fiber reinforced asphalt mixture (BFRAM) was selected as the subject of study. A series of material tests on the BFRAM were conducted to investigate the impact of basalt fibers on the physical and mechanical properties of the asphalt mixture, including bulk density, stability, flow value, and compressive strength. Based on the discrete element method, the entire process of crack formation, development, and failure of the asphalt mixture under uniaxial compression was simulated. This simulation served to uncover the microscopic strengthening mechanism of the BFRAM. The results indicated that as the fiber content increased, the bulk density and voids filled with asphalt with 6 mm and 9 mm fiber content first decreased, then increased, and finally decreased again. For 12 mm fiber content, the bulk density and voids filled with asphalt first increased and then decreased. Conversely, the void content of asphalt mixture and the asphalt-aggregate ratio showed an opposite trend, while Marshall stability consistently increased. The compressive strength of the asphalt mixture initially rises and then falls. When the fiber content reached 0.3%, the stability and compressive strength of the asphalt mixture increased by 23.6% and 43.3% respectively, in comparison to the asphalt mixture without fiber. From the perspective of microscopic mechanism analysis, the adhesion between asphalt aggregates was significantly strengthened after the addition of fibers. When the fiber content was less than 0.3%, the number of cracks, crack width, and damage degree of the asphalt mixture were notably improved. However, when the fiber content exceeded 0.3%, fiber agglomeration occurred. This phenomenon reduced the number of contacts within the mixtures, leading to a decrease in the compressive strength of the BFRAM.

Keywords: Basalt fiber, asphalt mixture, Material test, Discrete Element Method, Microscopic mechanism analysis

Received: 12 Sep 2025; Accepted: 03 Oct 2025.

Copyright: © 2025 Xue, Fang, Xiong, Ma, Wang, Sun and Wu. 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: Kun Wu, k_wu@cauc.edu.cn

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