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<p>The shape of particles is an inherent property that significantly influences the breakage strength of calcareous granular material, but the quantitative relationship between these factors remains unclear. In this study, the shape indicators of calcareous sand particles were calculated using three-dimensional scanning results. Subsequently, uniaxial compression tests were conducted to obtain the breakage strength of calcareous sand, and the influence of shape variations on breakage strength was determined. The results indicate that as the aspect ratio of particles decreases or sphericity increases, the average breakage strength (<InlineEquation ID="IEq1"> <EquationSource Format="TEX">\( \sigma _{{\text{m}}} \)</EquationSource> </InlineEquation>), characteristic breakage strength (<InlineEquation ID="IEq2"> <EquationSource Format="TEX">\( \sigma _{{\text{0}}} \)</EquationSource> </InlineEquation>), and theoretical average breakage strength (<InlineEquation ID="IEq3"> <EquationSource Format="TEX">\(\bar{\sigma}\)</EquationSource> </InlineEquation>) of calcareous sand all decrease progressively. Furthermore, the required breakage energy also declines, following a nearly linear trend. Both breakage strength and energy of calcareous sand exhibit a Weibull distribution, with the Weibull modulus (<i>m</i>) for breakage strength ranging between 1 and 2, and for breakage energy ranging between 4.48 and 6.49. These findings provide valuable insights for theoretical research, engineering practice, and numerical simulations.</p>

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A study on the influence of particle shape on the breakage strength of calcareous granular material

  • 期刊论文

  • 发表日期：

    2025年12月11日

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  • Hongwei Yang,
  • Shunkai Liu,
  • Zhaoyi Li,
  • Wei Hu,
  • Mohammed Ashiru,
  • Ali Shamshad,
  • Chuanfeng Fang,
  • Zongtang Zhang

摘要

The shape of particles is an inherent property that significantly influences the breakage strength of calcareous granular material, but the quantitative relationship between these factors remains unclear. In this study, the shape indicators of calcareous sand particles were calculated using three-dimensional scanning results. Subsequently, uniaxial compression tests were conducted to obtain the breakage strength of calcareous sand, and the influence of shape variations on breakage strength was determined. The results indicate that as the aspect ratio of particles decreases or sphericity increases, the average breakage strength ( \( \sigma _{{\text{m}}} \) ), characteristic breakage strength ( \( \sigma _{{\text{0}}} \) ), and theoretical average breakage strength ( \(\bar{\sigma}\) ) of calcareous sand all decrease progressively. Furthermore, the required breakage energy also declines, following a nearly linear trend. Both breakage strength and energy of calcareous sand exhibit a Weibull distribution, with the Weibull modulus (m) for breakage strength ranging between 1 and 2, and for breakage energy ranging between 4.48 and 6.49. These findings provide valuable insights for theoretical research, engineering practice, and numerical simulations.