Experimental and modeling results for reconsolidation of crushed natural rock salt under varying physical conditions
Mined salt from the underground facility at the Waste Isolation Pilot Plant (WIPP) Project is a candidate material for use as backfill around the waste packages and in the underground openings during and after the operational phase. We have conducted a series of hydrostatic and triaxial compression experiments on the time-dependent compaction behavior of crushed salt under nominally dry, damp,'' (0.5-3 wt % added water), and brine-saturated conditions. Though the compaction of dry crushed salt is very show in the laboratory, damp salt is likely to compact as rapidly as the mine walls can converge. Drained tests on brine-saturated crushed salt indicate that, though effects associated with saturation do retard consolidation rates slightly, high fractional densities ({ge} 0.95) can still be obtained on laboratory time scales at pressures below lithostatic at the WIPP. Triaxial compression experiments indicate that small deviatoric stresses have little impact on consolidation rates. Micromechanical models for the compaction of dry and damp crushed salt, based on isostatic hot-pressing models, are discussed.
- Research Organization:
- Sandia National Labs., Albuquerque, NM (United States)
- Sponsoring Organization:
- DOE; USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 5918142
- Report Number(s):
- SAND-90-2509; CONF-910907--4; ON: DE92004952
- Country of Publication:
- United States
- Language:
- English
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Experimental and modeling results for reconsolidation of crushed natural rock salt under varying physical conditions: Applications to nuclear waste isolation in bedded and domal salt formations
Interim report on the effects of brine-saturation and shear stress on consolidation of crushed, natural rock salt from the Waste Isolation Pilot Plant (WIPP)
Related Subjects
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
36 MATERIALS SCIENCE
360602 -- Other Materials-- Structure & Phase Studies
58 GEOSCIENCES
580000 -- Geosciences
ACOUSTIC EMISSION TESTING
ACOUSTIC TESTING
BACKFILLING
BRINES
CHEMICAL ANALYSIS
CHEMISTRY
COMPRESSIBILITY
CREEP
CRYSTAL STRUCTURE
EVAPORITES
FLUID MECHANICS
FUNCTIONAL MODELS
GEOCHEMISTRY
GEOLOGIC DEPOSITS
GRAIN DENSITY
MATERIALS TESTING
MECHANICAL PROPERTIES
MECHANICS
MICROSTRUCTURE
NATIONAL ORGANIZATIONS
NONDESTRUCTIVE TESTING
NUCLEAR FACILITIES
PERMEABILITY
PILOT PLANTS
POROSITY
QUANTITATIVE CHEMICAL ANALYSIS
RADIOACTIVE WASTE FACILITIES
ROCKS
SALT DEPOSITS
SATURATION
SEDIMENTARY ROCKS
SHEAR
STRAINS
STRESSES
TESTING
UNDERGROUND FACILITIES
US DOE
US ORGANIZATIONS
VOLUMETRIC ANALYSIS
WIPP