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Mellegard, K.D.; Senseny, P.E.; Hansen, F.D.
RE/SPEC, Inc., Rapid City, SD (USA)1983
RE/SPEC, Inc., Rapid City, SD (USA)1983
AbstractAbstract
[en] This report primarily describes triaxial compression creep experiments performed on dome salt from Avery Island, Louisiana. The ranges of axial stress difference Δsigma, confining pressure sigma2, and temperature T studied covered those expected in a nuclear waste repository: 5.4 less than or equal to Δsigma less than or equal to 20.7 MPa, 0.7 less than or equal to sigma2 less than or equal to 20.7 MPa, 240C less than or equal to T less than or equal to 2000C. All specimens exhibited transient creep, and the strain data were fitted to a constitutive law of the form epsilon = AtmΔsigmanTp. The duration of some creep experiments was long enough for the specimens to reach steady-state deformation. An activation energy for the rate-controlling deformation mechanism was calculated using data from these experiments. A few quasi-static strength tests were performed at 240C. A common load rate of 0.002 MPa/sec was used for each experiment while confining pressures ranged from 0 to 20.7 MPa. The data presented in this report obtained using 100-mm-diam specimens. The results were compared to previous work, which used 50-mm-diam specimens
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Apr 1983; 219 p; Available from NTIS, PC A10/MF A01 as DE83012965
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