Laboratory Analysis of Carbon Dioxide Hydrate-Bearing Sands
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 134, Issue 4
Abstract
Gas hydrates are ice-like compounds composed of water molecules that encapsulate natural gas molecules in a very compact form. Three groups of hydrate-bearing sand specimens were formed using a specialized triaxial test apparatus at different temperature and different pressure to examine the physical effects, such as stress and deformation changes, of hydrate dissociation on the surrounding soil. The triaxial test data indicate: (1) the higher the pressure, the higher hydrate content; (2) the lower the temperature, the higher hydrate content; (3) the greater the amount of gas hydrate initially present in the specimen, the greater the reduction of effective stress upon dissociation and the lower strength; and (4) dissociation of even a small percentage of gas hydrates will cause a dramatic reduction in the soil strength and could lead to failure.
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Acknowledgments
The writer would like to thank Alberta Ingenuity Fund and Canadian Foundation for Innovation for the funding provided for both infrastructure and operating costs for this research laboratory.
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Information & Authors
Information
Published In
Journal of Geotechnical and Geoenvironmental Engineering
Volume 134 • Issue 4 • April 2008
Pages: 547 - 550
Copyright
© 2008 ASCE.
History
Received: Feb 28, 2007
Accepted: Jul 31, 2007
Published online: Apr 1, 2008
Published in print: Apr 2008
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