The Effect of Cementation on Microstructural Evolution and Particle Characteristics of Calcareous Sand Under Triaxial Loading
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| Udgivet i: | Buildings vol. 15, no. 12 (2025), p. 2041 |
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MDPI AG
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| Online adgang: | Citation/Abstract Full Text + Graphics Full Text - PDF |
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| 001 | 3223882236 | ||
| 003 | UK-CbPIL | ||
| 022 | |a 2075-5309 | ||
| 024 | 7 | |a 10.3390/buildings15122041 |2 doi | |
| 035 | |a 3223882236 | ||
| 045 | 2 | |b d20250615 |b d20250630 | |
| 084 | |a 231437 |2 nlm | ||
| 100 | 1 | |a Wang Wanying |u School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou 510006, China | |
| 245 | 1 | |a The Effect of Cementation on Microstructural Evolution and Particle Characteristics of Calcareous Sand Under Triaxial Loading | |
| 260 | |b MDPI AG |c 2025 | ||
| 513 | |a Journal Article | ||
| 520 | 3 | |a Calcareous sands are widely distributed across the South China Sea’s continental shelf and coastlines. Understanding their mechanical behavior and microstructural evolution under cementation is critical for coastal engineering applications. While previous studies have investigated cemented calcareous sands, the comparative analyses of particle breakage and microstructural characteristics between cemented and pure sands remain limited. This study combines triaxial compression tests with X-ray CT scanning and Digital Volume Correlation analysis to systematically examine both material types. Pre- and post-loading CT scans enabled the detailed tracking of microstructural transformations. Results demonstrate that cemented specimens exhibit higher strength–stiffness properties with strain-softening behavior compared to pure sand under 200 kPa confining pressures. A quantitative analysis revealed greater particle breakage in cemented sand, while pure sand showed more pronounced increases in particle sphericity and the aspect ratio during deformation, accompanied by reduced porosity variation along specimen height (coefficient of variation decreased from 15.2% to 12.8% for pure sand. Microstructural analysis indicated moderate increases in pore sphericity and reduced anisotropy in both materials. Fractal dimension analysis demonstrated more significant structural reorganization in cemented sands. Both materials exhibited increases in key morphological parameters, including the throat equivalent radius, channel length, pore equivalent radius, and coordination number, with changes being more substantial in cemented sands. Within shear band regions, cemented sands displayed marked reductions in pore and throat quantities. These findings elucidate fundamental relationships between cementation effects and micro–macro mechanical responses, providing theoretical support for geotechnical applications involving calcareous sands. | |
| 653 | |a Mechanical properties | ||
| 653 | |a Plastic deformation | ||
| 653 | |a Edge dislocations | ||
| 653 | |a Cementation | ||
| 653 | |a Tomography | ||
| 653 | |a Microstructural analysis | ||
| 653 | |a Coordination numbers | ||
| 653 | |a Comparative analysis | ||
| 653 | |a Fractal analysis | ||
| 653 | |a Investigations | ||
| 653 | |a Fractal geometry | ||
| 653 | |a Sand | ||
| 653 | |a Triaxial loads | ||
| 653 | |a Anisotropy | ||
| 653 | |a Equivalence | ||
| 653 | |a Correlation analysis | ||
| 653 | |a Compression tests | ||
| 653 | |a Aspect ratio | ||
| 653 | |a Continental shelves | ||
| 653 | |a Medical imaging | ||
| 653 | |a Influence | ||
| 653 | |a Coastal engineering | ||
| 653 | |a Coefficient of variation | ||
| 653 | |a Shear tests | ||
| 653 | |a Porosity | ||
| 653 | |a Computed tomography | ||
| 653 | |a Shear bands | ||
| 653 | |a Microscopy | ||
| 653 | |a Sand & gravel | ||
| 653 | |a Cement | ||
| 653 | |a Morphology | ||
| 653 | |a Triaxial compression tests | ||
| 700 | 1 | |a Huang Jiepeng |u School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou 510006, China | |
| 700 | 1 | |a Chen, Degao |u Guangdong Construction Engineering Quality & Safety Testing Head Station Co., Ltd., Guangzhou 510500, China | |
| 700 | 1 | |a Luo Qingzi |u School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou 510006, China | |
| 700 | 1 | |a Yuan Bingxiang |u School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou 510006, China | |
| 773 | 0 | |t Buildings |g vol. 15, no. 12 (2025), p. 2041 | |
| 786 | 0 | |d ProQuest |t Engineering Database | |
| 856 | 4 | 1 | |3 Citation/Abstract |u https://www.proquest.com/docview/3223882236/abstract/embedded/7BTGNMKEMPT1V9Z2?source=fedsrch |
| 856 | 4 | 0 | |3 Full Text + Graphics |u https://www.proquest.com/docview/3223882236/fulltextwithgraphics/embedded/7BTGNMKEMPT1V9Z2?source=fedsrch |
| 856 | 4 | 0 | |3 Full Text - PDF |u https://www.proquest.com/docview/3223882236/fulltextPDF/embedded/7BTGNMKEMPT1V9Z2?source=fedsrch |