Influence particle size on strength of gas hydrate cemented
granular materials
Influence particle size on strength of gas hydrate cemented
granular materials
Quantifying the effect of gas hydrates on engineering properties of sediments is essential to assess its role as triggering mechanism for submarine slope instabilities, potential energy resource or accelerating climate change. Previous studies show cementation due to presence of gas hydrate in deep ocean sediments or permafrost influences the seismic wave velocities of host sediment. This study examines the effect of particle size on the strengths of gas hydrate cemented granular materials using our recently developed gas hydrate triaxial apparatus. Cylindrical specimens of given porosity, methane hydrate content were prepared using ‘excess gas method’ and sheared undrained at constant effective stress and rate of shearing for sands. These tests were then compared with their corresponding host sediments with no hydrates. The stress strain behaviour indicates the host soils exhibits stiffer behaviour due to presence of hydrates similar to structured soils of sensitivity greater than 10. However, the change in strength behaviour of the disseminated gas hydrate sediments is significantly influenced by the particle size, in terms of their specific surface and grading of the granular material regardless of similarity in the hydrate concentration.
445-449
Madhusudhan, B.N.
e139e3d3-2992-4579-b3f0-4eec3ddae98c
Clayton, C.R.I.
8397d691-b35b-4d3f-a6d8-40678f233869
August 2016
Madhusudhan, B.N.
e139e3d3-2992-4579-b3f0-4eec3ddae98c
Clayton, C.R.I.
8397d691-b35b-4d3f-a6d8-40678f233869
Madhusudhan, B.N. and Clayton, C.R.I.
(2016)
Influence particle size on strength of gas hydrate cemented
granular materials.
Wuttke, F., Bauer, S. and Sanchez, M.
(eds.)
In Energy Geotechnics.
CRC Press.
.
(doi:10.1201/b21938-71).
Record type:
Conference or Workshop Item
(Paper)
Abstract
Quantifying the effect of gas hydrates on engineering properties of sediments is essential to assess its role as triggering mechanism for submarine slope instabilities, potential energy resource or accelerating climate change. Previous studies show cementation due to presence of gas hydrate in deep ocean sediments or permafrost influences the seismic wave velocities of host sediment. This study examines the effect of particle size on the strengths of gas hydrate cemented granular materials using our recently developed gas hydrate triaxial apparatus. Cylindrical specimens of given porosity, methane hydrate content were prepared using ‘excess gas method’ and sheared undrained at constant effective stress and rate of shearing for sands. These tests were then compared with their corresponding host sediments with no hydrates. The stress strain behaviour indicates the host soils exhibits stiffer behaviour due to presence of hydrates similar to structured soils of sensitivity greater than 10. However, the change in strength behaviour of the disseminated gas hydrate sediments is significantly influenced by the particle size, in terms of their specific surface and grading of the granular material regardless of similarity in the hydrate concentration.
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e-pub ahead of print date: 4 August 2016
Published date: August 2016
Venue - Dates:
1st International Conference on Energy Geotechnics ICEGT 2016, Kiel, Germany, 2016-08-29 - 2016-08-31
Organisations:
Infrastructure Group
Identifiers
Local EPrints ID: 400459
URI: http://eprints.soton.ac.uk/id/eprint/400459
PURE UUID: 884e1587-2f20-434c-929e-fee8112c576c
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Date deposited: 16 Sep 2016 13:36
Last modified: 15 Mar 2024 03:50
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Editor:
F. Wuttke
Editor:
S. Bauer
Editor:
M. Sanchez
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