Dr John McDougall J.McDougall@napier.ac.uk
Reader
Particle loss: An initial investigation into size effects and stress-dilatancy
McDougall, John; Kelly, Darren; Daniel, Barreto
Authors
Darren Kelly
Dr Daniel Barreto Gonzalez D.Barreto@napier.ac.uk
Lecturer T&S
Abstract
Drained triaxial tests have been performed to explore the effect of particle loss on shearing behaviour and critical states in granular mixtures. The mixtures comprise Leighton Buzzard sand (d50 = 0.8 mm), to which was added 15% by mass of salt particles of different nominal sizes: 0.063 mm, 0.25 mm and 0.5 mm. Shearing behaviours before and after particle loss (by dissolution) were compared. A good fit is observed between the test data and a stress-dilatancy relationship for the post-dissolution tests, highlighting the ability of the stressdilatancy analysis as a means to interpret the effects of particle loss on shearing. It was noted that critical state strength parameter M is determined by the post-dissolution grading regardless of size of removed particle. However, the duration of contractant volumetric strain increased with the larger removed particles (0.25 mm & 0.5 mm) even when initial specific volumes were virtually identical. It is suggested that a loose volumetric state is reached if the sand particle network is initially disrupted by the amount and/or size of salt particles, which following dissolution results in structural or fabric phenomena that are not reflected in scalar volumetric measures such as specific volume.
Citation
McDougall, J., Kelly, D., & Daniel, B. (2019). Particle loss: An initial investigation into size effects and stress-dilatancy. Soils and Foundations, https://doi.org/10.1016/j.sandf.2019.03.002
Journal Article Type | Article |
---|---|
Acceptance Date | Mar 5, 2019 |
Online Publication Date | Apr 27, 2019 |
Publication Date | 2019-06 |
Deposit Date | Mar 15, 2019 |
Publicly Available Date | Mar 29, 2024 |
Journal | Soils and Foundations |
Print ISSN | 0038-0806 |
Publisher | Elsevier |
Peer Reviewed | Peer Reviewed |
DOI | https://doi.org/10.1016/j.sandf.2019.03.002 |
Keywords | Soluble soils, particle loss, laboratory testing, triaxial testing, stress-dilatancy |
Public URL | http://researchrepository.napier.ac.uk/Output/1568493 |
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PARTICLE LOSS: AN INITIAL INVESTIGATION INTO SIZE EFFECTS AND STRESS-DILATANCY
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Copyright Statement
© . This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
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