Mobilized strength components of Athabasca oil sand in triaxial compression

Mobilized strength components of Athabasca oil sand in triaxial compression

Dense uncemented Athabasca oil sand specimens exhibit unusually high peak strength, dilation with severe softening, and residual strength in drained triaxial compression tests. Computer tomography scanning, X-ray imaging, and scanning electron microscopy techniques are used to examine the microstruc...

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Veröffentlicht in:Canadian geotechnical journal 1999-11, Vol.36 (4), p.718-735
1. Verfasser: Wong, Ron CK
Format: Artikel
Sprache:eng
Schlagworte:
Compression
Earth sciences
Earth, ocean, space
Engineering and environment geology. Geothermics
Engineering geology
Exact sciences and technology
Oil sands
Soil mechanics
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creator Wong, Ron CK
description Dense uncemented Athabasca oil sand specimens exhibit unusually high peak strength, dilation with severe softening, and residual strength in drained triaxial compression tests. Computer tomography scanning, X-ray imaging, and scanning electron microscopy techniques are used to examine the microstructural features of the sheared specimens, such as interlocked structure, shear-banding pattern, and porosity distributions inside and outside shear bands. The characteristics of these microstructural features are used to explain the macrodeformation responses observed in the triaxial compression tests. Mobilization of strength components derived from interlocked structure, dilation, rolling, and critical state are analyzed for pre-peak, post-peak softening, and residual states.Key words: oil sand, interlocked structure, shear dilation, shear band, critical state.
doi_str_mv 10.1139/t99-040
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source NRC Research Press; Alma/SFX Local Collection
subjects Compression
Earth sciences
Earth, ocean, space
Engineering and environment geology. Geothermics
Engineering geology
Exact sciences and technology
Oil sands
Soil mechanics
title Mobilized strength components of Athabasca oil sand in triaxial compression
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