Mechanical properties of anhydrite and polyhalite in quasi-static triaxial compression
Bedded salt of the Salado Formation at the WIPP site in southeastern New Mexico is being considered as a nuclear waste containment media. The Salado Formation is composed of 85 to 90 percent rock salt and the remaining 10 to 15 percent of the formation consists primarily of polycrystalline anhydrite, smaller amounts of polycrystalline polyhalite, and minor amounts of clay. In order to provide a more complete evaluation of the thermomechanical behavior of rock in the Salado Formation adjacent to the proposed repository, a rock mechanics testing program has been initiated to determine the mechanical properties of the two most abundant nonsalt rock, anhydrite and polyhalite. This report summarizes the mechanical properties of these two rock types in dry, room temperature, quasi-static triaxial compression experiments to 20 MPa confining pressure. In addition, Coulomb-Mohr and Mises-Drucker criteria have been fit successfully to both yield and failure stress data.
- Research Organization:
- Sandia National Labs., Albuquerque, NM (USA)
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 6074335
- Report Number(s):
- SAND-81-0858; ON: DE82003195
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
36 MATERIALS SCIENCE
360603* -- Materials-- Properties
ALKALINE EARTH METAL COMPOUNDS
ANHYDRITE
CALCIUM COMPOUNDS
CALCIUM SULFATES
DATA
EXPERIMENTAL DATA
GEOLOGIC DEPOSITS
HIGH PRESSURE
INFORMATION
MANAGEMENT
MECHANICAL PROPERTIES
MEDIUM PRESSURE
MEDIUM TEMPERATURE
MINERALS
NUMERICAL DATA
OXYGEN COMPOUNDS
POISSON RATIO
POLYHALITE
PRESSURE DEPENDENCE
RADIOACTIVE WASTE DISPOSAL
SALT DEPOSITS
SHEAR PROPERTIES
SULFATES
SULFUR COMPOUNDS
UNDERGROUND DISPOSAL
WASTE DISPOSAL
WASTE MANAGEMENT
YIELD STRENGTH
YOUNG MODULUS