Mechanical properties and consolidation of potential DHLW (Defense High-Level Wastes) backfill materials: Crushed salt and 70/30 bentonite/sand. [Crushed salt: bentonite = 70:30 by weight]
Thermomechanical properties of intact rock salt and the waste package materials have appeared in the literature. Only limited data is available, however, for the two backfill materials of interest in the analyses, crushed salt and 70/30 (by weight) bentonite/sand. A unique property of bentonite-based materials is the propensity for clay particles to swell as a result of water sorption. If volume expansion is prevented or partially restricted, pressures are built up within the bentonite materials. Therefore, the primary objective of this study is to supply appropriate data (not available in the literature) in support of the aforementioned detailed thermomechanical stress analyses. The study consists of laboratory tests performed on samples of crushed salt and 70/30 bentonite/sand. The remainder of this report is organized into five chapters and four appendixes. Chapter 2 describes the specimens tested in this study. Chapter 3 describes the testing machines and test procedures used. Chapter 4 gives the results of the tests on crushed salt and 70/30 bentonite/sand. Chapter 5 gives conclusions of the test program and is followed by a list of cited references. Four appendixes conclude the report. The first and second give stress-strain curves for the unconfined compression tests on crushed salt and 70/30 bentonite/sand, respectively; the third gives details of the algorithm used to compute volumetric strains during hydrostatic compression tests which accounts for vessel volume change; while the final appendix gives mean stress-volumetric strain curves for the hydrostatic compression tests. 16 refs., 18 figs., 10 tabs.
- Research Organization:
- RE/SPEC, Inc., Rapid City, SD (USA)
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 6450062
- Report Number(s):
- SAND-85-7208; ON: DE87012509; TRN: 87-025461
- Resource Relation:
- Other Information: Portions of this document are illegible in microfiche products. Original copy available until stock is exhausted
- Country of Publication:
- United States
- Language:
- English
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Consolidation of the Waste Isolation Pilot Plant crushed salt/bentonite mixtures as a function of confining pressure and moisture content as compared with constitutive model predictions
Consolidation of the Waste Isolation Pilot Plant crushed salt/bentonite mixtures as a function of confining pressure and moisture content as compared with constitutive model predictions
Related Subjects
COMPRESSION STRENGTH
EXPERIMENTAL DATA
HIGH-LEVEL RADIOACTIVE WASTES
RADIOACTIVE WASTE DISPOSAL
PACKINGS
MECHANICAL PROPERTIES
POISSON RATIO
YOUNG MODULUS
BENTONITE
BOREHOLES
CASKS
COMPRESSION
CONTAINERS
CREEP
PARTICLE SIZE
RADIOACTIVE WASTES
SALT DEPOSITS
SAND
STRAINS
STRESSES
SWELLING
WASTE FORMS
CAVITIES
CLAYS
DATA
GEOLOGIC DEPOSITS
INFORMATION
MANAGEMENT
MATERIALS
NUMERICAL DATA
RADIOACTIVE MATERIALS
SIZE
WASTE DISPOSAL
WASTE MANAGEMENT
WASTES
052002* - Nuclear Fuels- Waste Disposal & Storage