Effect of Porosity on the Hydrostatic Compression of Ice

A cathetometer was used in conjunction with a window-equipped pressure chamber to measure linear deformation in porous polycrystalline ice samples compressed hydrostatically at pressures of up to 0.31 kb. Tests show that a porosity as little as 1% can increase the compressibility of ice four- or fiv...

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Bibliographic Details
Main Authors: Gow,Anthony J., Sheehy,William
Other Authors: COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER N H
Format: Text
Language:English
Published: 1975
Subjects:
Snow
Ice and Permafrost
*Ice
*Porosity
*Compression
Hydrostatic pressure
Ice islands
Plastic deformation
Antarctic Regions
Glaciers
*Ice cores
Antarctic
Antarc*
Ice
permafrost
Online Access:http://www.dtic.mil/docs/citations/ADA017302
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA017302
Description
Summary:A cathetometer was used in conjunction with a window-equipped pressure chamber to measure linear deformation in porous polycrystalline ice samples compressed hydrostatically at pressures of up to 0.31 kb. Tests show that a porosity as little as 1% can increase the compressibility of ice four- or fivefold. However, the compression is of a substantially nonelastic nature, since very little recovery (expansion) occurs during and following pressure release. Pore closure, which is virtually complete at the higher pressures, can be attributed to a combination of plastic and cataclastic deformation of ice in the walls of the pores.

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