Effect of particle characteristics on the evolution of particle size, particle morphology, and fabric of sands loaded under uniaxial compression

Autor: Monica Prezzi, Wayne Chen, Niranjan D. Parab, Mustafa Kılıç, Eshan Ganju, Rodrigo Salgado
Rok vydání: 2021
Předmět:
Zdroj: Acta Geotechnica. 16:3489-3516
ISSN: 1861-1133
1861-1125
DOI: 10.1007/s11440-021-01309-3
Popis: This paper presents the results and analyses of uniaxial compression experiments performed on three silica sands. The sands have comparable particle-size distributions, but their particles differ in morphology and strength. Cylindrical samples of the three sands were compressed in a loading device placed inside an X-ray microscope (XRM) and scanned at multiple stress levels during uniaxial compression. 3D tomography data of the samples obtained from the XRM at different stress levels were then analyzed to obtain the distributions of particle size, particle morphology, and interparticle contact normals within the sample. Results indicate that: (1) the compressibility of the sands loaded under uniaxial compression is closely tied to particle morphology and strength and (2) the anisotropy in the orientations of interparticle contact normals generally increases with axial stress; however, this increase is limited by the occurrence of particle crushing in the sample.
Databáze: OpenAIRE
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