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<p>Adding basalt fiber (BF) to cement-based materials has been shown to significantly improve the cracking resistance and deformation ability of the cement matrix. However, the dispersion of BF is greatly affected by coarse aggregates (CA). Thus, clarifying the “synergistic-antagonistic” effect between BF and CA is of significant significance for the design of high-performance BF-reinforced cement-based materials. In this paper, an experimental study was carried out on the mechanical properties and damage evolution of BF-reinforced cement-based materials containing CA (CA-BFCC) by considering the orthogonal test conditions between 4 CA contents and 4 BF contents. The experimental results indicate that the basic mechanical properties of CA-BFCC initially increase and subsequently decrease with rising CA content (peaking at 20%), while the variation patterns under increasing BF content differ depending on loading modes (compressive strength: 2%; tensile and shear strengths: 3%). Compared to the CA-BFCC control group without CA and BF incorporation, the corresponding enhancements in compressive, tensile, and shear strengths under these parameter configurations reached 20.18, 14.32, and 20.65, respectively. This suggests that moderate CA content facilitates BF dispersion, where BF’s bridging effect effectively mitigates Interface Transition Zone defects induced by CA, demonstrating significant synergistic effect. Conversely, excessive CA or BF leads to fiber agglomeration, resulting in pronounced antagonistic effects. Furthermore, appropriate CA and BF contents elevate the fracture energy required for crack propagation. A damage constitutive model for CA-BFCC was established using Digital Image Correlation (DIC) technology, employing strain standard deviation as the damage factor, which exhibited satisfactory fitting performance.</p>

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Research on the “synergistic-antagonistic” effect between coarse aggregate and basalt fiber on the basic mechanical properties of cement matrix

  • 期刊论文

  • 发表日期：

    2026年3月17日

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  • Zetian Zhang,
  • Lei Xie,
  • Xinjian Sun,
  • Lihong Wang,
  • Xiaoli Xu,
  • Zhenpeng Yu,
  • Ligang Jing

摘要

Adding basalt fiber (BF) to cement-based materials has been shown to significantly improve the cracking resistance and deformation ability of the cement matrix. However, the dispersion of BF is greatly affected by coarse aggregates (CA). Thus, clarifying the “synergistic-antagonistic” effect between BF and CA is of significant significance for the design of high-performance BF-reinforced cement-based materials. In this paper, an experimental study was carried out on the mechanical properties and damage evolution of BF-reinforced cement-based materials containing CA (CA-BFCC) by considering the orthogonal test conditions between 4 CA contents and 4 BF contents. The experimental results indicate that the basic mechanical properties of CA-BFCC initially increase and subsequently decrease with rising CA content (peaking at 20%), while the variation patterns under increasing BF content differ depending on loading modes (compressive strength: 2%; tensile and shear strengths: 3%). Compared to the CA-BFCC control group without CA and BF incorporation, the corresponding enhancements in compressive, tensile, and shear strengths under these parameter configurations reached 20.18, 14.32, and 20.65, respectively. This suggests that moderate CA content facilitates BF dispersion, where BF’s bridging effect effectively mitigates Interface Transition Zone defects induced by CA, demonstrating significant synergistic effect. Conversely, excessive CA or BF leads to fiber agglomeration, resulting in pronounced antagonistic effects. Furthermore, appropriate CA and BF contents elevate the fracture energy required for crack propagation. A damage constitutive model for CA-BFCC was established using Digital Image Correlation (DIC) technology, employing strain standard deviation as the damage factor, which exhibited satisfactory fitting performance.