Zhao, B;
Wang, J;
Ando, E;
Viggiani, G;
Coop, MR;
(2020)
An Investigation of Particle Breakage under One-Dimensional Compression of Sand Using X-ray Micro-Tomography.
Canadian Geotechnical Journal
, 57
(5)
pp. 623-634.
10.1139/cgj-2018-0548.
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Abstract
Particle breakage alters particle-scale properties of granular soils including particle size, shape, and contact conditions, and changes macro-scale properties including soil compressibility, shear strength, and permeability. This study monitors the crushing of natural quartz sands under one-dimensional compression with in-situ X-ray tomography, i.e., X-ray scans during loading. We use the assembly-scale and particle-scale images to characterise particle failure patterns, e.g., chipping, major splitting and comminution. Image processing and analysis enable us to determine the failure patterns around the yield stress, and the influence of initial density and particle morphology on the particle survival probability. We further quantify the degree of particle breakage with fractal dimension, breakage factor, and specific surface. Particle shape and coordination number both show a scale-dependent evolution pattern.
| Type: | Article |
|---|---|
| Title: | An Investigation of Particle Breakage under One-Dimensional Compression of Sand Using X-ray Micro-Tomography |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1139/cgj-2018-0548 |
| Publisher version: | https://doi.org/10.1139/cgj-2018-0548 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Fractals; laboratory tests; particle crushing/crushability; particle-scale behaviour; sands |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Civil, Environ and Geomatic Eng |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10075565 |
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