X-ray microtomography analysis of soil structure deformation caused by centrifugation
| Autor: | S. Schlüter, F. Leuther, S. Vogler, H.-J. Vogel |
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| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: | |
| Zdroj: | Solid Earth, Vol 7, Iss 1, Pp 129-140 (2016) |
| Druh dokumentu: | article |
| ISSN: | 1869-9510 1869-9529 |
| DOI: | 10.5194/se-7-129-2016 |
| Popis: | Centrifugation provides a fast method to measure soil water retention curves over a wide moisture range. However, deformation of soil structure may occur at high angular velocities in the centrifuge. The objective of this study was to capture these changes in soil structure with X-ray microtomography and to measure local deformations via digital volume correlation. Two samples were investigated that differ in texture and rock content. A detailed analysis of the pore space reveals an interplay between shrinkage due to drying and soil compaction due to compression. Macroporosity increases at moderate angular velocity because of crack formation due to moisture release. At higher angular velocities, corresponding to capillary pressure of ψ |
| Databáze: | Directory of Open Access Journals |
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