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Pore scale investigation of unsaturated granular soil behaviour by means of in situ CT experiments
Citation Link: https://doi.org/10.15480/882.5187
Publikationstyp
Conference Paper
Date Issued
2023
Sprache
English
Author(s)
Institut
TORE-DOI
First published in
Number in series
382
Article Number
11004
Citation
E3S Web of Conferences 382: 11004 (2023)
Contribution to Conference
Publisher DOI
Scopus ID
Publisher
EDP Sciences
With continuing evolution of imaging techniques from medical applications and materials science, non-destructive imaging experiments have also become an important method to investigate soil specimens. Amongst other methods, computed tomography (CT) has developed to a tool to visualise and better understand the microstructure of different soils based on 3D image data. Furthermore, the acquisition of a temporal series of CT images allows to study processes in soils on the microscale, e. g., during mechanical loading. In order to study the hydraulic and mechanical behaviour of unsaturated granular soils, we combine different custom-built miniaturised experimental set-ups with geomechanics background with computed tomography, yielding so-called in situ CT experiments. By means of image reconstruction and further image analysis based on segmented CT images acquired during different hydraulic and mechanical experiments, we study the drainage and imbibition process as well as the shear process of unsaturated sand and glass bead specimens on the pore or grain scale. The analysis of data on the microscopic level, including the phase distribution, interfacial areas, contact lines as well as radii of curvature of capillary menisci, allows to obtain insights into the macroscopic water retention behaviour and shear behaviour of granular soils.
DDC Class
600: Technik
620: Ingenieurwissenschaften
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publishedVersion
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