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<p>This study investigated the synergistic effects of basalt fiber (BF) and polypropylene fiber (PF) on the mechanical performance of hybrid fiber-reinforced concrete. A Central Composite Design (CCD) was employed, with fiber volume content (0-0.4%) as the variable, and compressive and split tensile strengths as responses. Quadratic regression models based on Response Surface Methodology (RSM) showed high accuracy, with <i>R</i><sup>2</sup> values of 0.9744 and 0.9774, respectively. Analysis revealed that PF exhibited a greater main effect on compressive strength, while BF contributed more significantly to split tensile strength. A significant interaction between fibers was observed, with an optimal reinforcement range. Multi-objective optimization determined the optimal mix as 0.16% BF and 0.15% PF, achieving predicted strengths of 49.212&#xa0;MPa (compressive) and 4.707&#xa0;MPa (split tensile). The study confirms the effectiveness of RSM in optimizing hybrid fiber concrete mix proportions.</p>

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Optimization of Mix Proportion of Basalt-Polypropylene Fiber Concrete Based on Response Surface Methodology

  • 期刊论文

  • 发表日期：

    2026年2月24日

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  • Shuailong Lian,
  • Jingjing Huang,
  • Wen Wan,
  • Yanlin Zhao,
  • Xuan Li,
  • Jiaxing Yang,
  • Xuan Wang

摘要

This study investigated the synergistic effects of basalt fiber (BF) and polypropylene fiber (PF) on the mechanical performance of hybrid fiber-reinforced concrete. A Central Composite Design (CCD) was employed, with fiber volume content (0-0.4%) as the variable, and compressive and split tensile strengths as responses. Quadratic regression models based on Response Surface Methodology (RSM) showed high accuracy, with R2 values of 0.9744 and 0.9774, respectively. Analysis revealed that PF exhibited a greater main effect on compressive strength, while BF contributed more significantly to split tensile strength. A significant interaction between fibers was observed, with an optimal reinforcement range. Multi-objective optimization determined the optimal mix as 0.16% BF and 0.15% PF, achieving predicted strengths of 49.212 MPa (compressive) and 4.707 MPa (split tensile). The study confirms the effectiveness of RSM in optimizing hybrid fiber concrete mix proportions.