Creep of 50-mm diameter specimens of dome salt from Avery Island, Louisiana

Technical Report · Fri Aug 01 04:00:00 EDT 1980

OSTI ID:6549317

Hansen, F D; Mellegard, K D

This report describes triaxial compression creep experiments performed on domal salt from Avery Island, Louisiana. The ranges of axial stress difference ..delta..sigma, confining pressure sigma2, and temperature T studies covered those expected in a nuclear waste repository: 6.9 less than or equal to ..delta..sigma less than or equal to 31.0 MPa, 0 less than or equal to sigma2 less than or equal to 20.7 MPa, 24/sup 0/C less than or equal to T less than or equal to 200/sup 0/C. All specimens exhibited transient creep, and the strain data were fitted to a constitutive law of the form epsilon = kt/sup n/..delta..sigma/sup m/T/sup p/. The duration of some experiments was long enough for the specimen to reach steady-state. An activation energy for the rate-controlling deformation mechanism was calculated using data from these experiments. Finally, creep of Avery Island and Jefferson Island domal salts were compared and found to be similar.

• Research Organization: RE/SPEC, Inc., Rapid City, SD (USA)
• DOE Contract Number: AC06-76RL01830
• OSTI ID: 6549317
• Report Number(s): ONWI-104
• Country of Publication: United States
• Language: English

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SOUTHWEST REGION
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STRESS ANALYSIS
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