Initial mechanical and physical-structural property measurements of old sea and brackish ice from Ward Hunt Ice Shelf, Canada

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Author	Search for: Jeffries, M. O.; Search for: Sackinger, W. M.; Search for: Frederking, R. M. W.¹; Search for: Timco, G. W.
Affiliation	National Research Council of Canada. NRC Institute for Research in Construction
Sponsor	Search for: International Association for Hydraulic Research
Format	Text, Article
Conference	9th International Symposium on Ice, August 23, 1988, Sapporo, Japan
Subject	ice; salinity; density (physics); form (morphology); compressive strength; ice salinity; ice density; grain size; morphology; uniaxial compressive strength; failure modulus; Ellesmere Island
Abstract	Data are presented on ice salinity, density, grain size and morphology, uniaxial compressive strength and failure modulus for old sea and brackish ice specimens from Ward Hunt Ice Shelf, Ellesmere Island, Canada. Brackish ice mean salinity (0.3 %) is an order of magnitude less than that of sea ice (1.59 %), and brackish ice structure is much more variable than sea ice. At a nominal strain rate of 1 x 10[- 5] s[-1] ice strength and failure modulus range from 1.7 to 8.9 MPa and 0.9 to 2.6 GPa respectively. At a nominal strain rate of 1 x 10[-3] s[-1] ice strength and failure modulus range from 3.8 to 15.0 MPa and 1.1 to 8.3 GPa respectively. The sea ice specimens have higher strength values than the brackish ice specimens, and the ice strength and failure modulus do not appear to differ significantly from "modern" ice. The physical-structural properties of the sea and brackish ice are discussed with respect to their differing mechanical properties, and the validity of comparing ice that differs significantly in age.
Publication date	1988
In	Proceedings of the 9th International Symposium on Ice: 23 August 1988, Sapporo, Japan 1 (1988): 177–187.
Language	English
Peer reviewed	Yes
Identifier	IRC-P-1608
NRC number	NRCC 30752 NRC-IRC-1378
NPARC number	20378885
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Record identifier	72f39c0e-0a4a-4bd1-b7db-dc71ac91ee5d
Record created	2012-07-24
Record modified	2024-05-10

Date modified:: 2024-07-06