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Study by X-ray microtomography of the horizontal vibration effects on sand densification

机译：X射线显微照相术研究水平振动对沙子致密化的影响

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摘要

X-ray microtomography experiments were performed in order to evaluate the densification of silica sand submitted to horizontal sinusoidal vibrations carried out at constant frequency (50 Hz) with controlled acceleration and deceleration Gamma. Packing homogeneity was characterized using relative density distribution through 3D images of the relaxed samples. Information obtained from the images allowed us to evaluate data at grain scale: porosity and pore size distribution, number of contacts per particle, particle shape and size distribution were evaluated and linked to the densification process. Based on the internal analysis of samples, the results confirm and extend the conclusions of previous works regarding the 3-layer densification under vibration and the proposed optimized vibration cycle to get dense and homogeneous samples. They extend them to different initial packings. Additionally, significant correlations are found between density and local particle packing characteristics such as pores size distribution, or the number of contacts per particle.
机译：进行X射线显微照相实验，以评估在恒定的频率（50 Hz）下以受控的加速和减速Gamma进行水平正弦振动的硅砂的致密化。通过松弛样品的3D图像通过相对密度分布来表征装填均匀性。从图像中获得的信息使我们能够评估晶粒度的数据：孔隙率和孔径分布，每个颗粒的接触数，颗粒形状和尺寸分布均经过评估，并与致密化过程相关。在对样品进行内部分析的基础上，结果证实并扩展了先前关于振动下三层致密化工作的结论，并提出了优化的振动周期以获得致密均匀的样品。他们将它们扩展到不同的初始包装。另外，在密度和局部颗粒堆积特征（例如孔径分布或每个颗粒的接触数）之间发现显着的相关性。

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  • 来源
    《Granular matter》 |2016年第3期|61.1-61.9|共9页
  • 作者

    Olmos L.; Chaix J. -M.; Nadler S.; Bonnefoy O.; Gelet J. -L.; Thomas G.;

  • 作者单位

    Univ Grenoble Alpes, SIMAP, BP 75, F-38402 St Martin Dheres, France|CNRS, BP 75, F-38402 St Martin Dheres, France|Univ Michoacana, Inst Invest Ciencias Tierra, Ed C-2 CU,Fco J Mujica S-N, Morelia 58060, Michoacan, Mexico;

    Univ Grenoble Alpes, SIMAP, BP 75, F-38402 St Martin Dheres, France|CNRS, BP 75, F-38402 St Martin Dheres, France;

    Ecole Natl Super Mines, Ctr SPIN, CNRS, LGF UMR 5307, 158 Cours Fauriel, F-42023 St Etienne 2, France;

    Ecole Natl Super Mines, Ctr SPIN, CNRS, LGF UMR 5307, 158 Cours Fauriel, F-42023 St Etienne 2, France;

    MERSEN, 6 Rue Vaucanson, F-69720 St Bonnet De Mure, France;

    Ecole Natl Super Mines, Ctr SPIN, CNRS, LGF UMR 5307, 158 Cours Fauriel, F-42023 St Etienne 2, France;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    X-ray microtomography; Horizontal vibration; Densification; Porosity; Sand packing;

    机译：X射线显微照相;水平振动;致密化;孔隙率;砂堆积;

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