Selection and durability of seal materials for a bedded salt repository: preliminary studies
This report details preliminary results of both experimental and theoretical studies of cementitious seal materials for use in a proposed nuclear waste repository in bedded salt. Effects of changes in bulk composition and environment upon phase stability and physical/mechanical properties have been evaluated for more than 25 formulations. Bonding and interfacial characteristics of the region between host rock and seal material or concrete aggregate and cementitious matrix for selected formulations have been studied. Compatibilities of clays and zeolites in brines typical of the SE New Mexico region have been investigated, and their stabilities reviewed. Results of these studies have led to the conclusion that cementitious materials can be formulated which are compatible with the major rock types in a bedded salt repository environment. Strengths are more than adequate, permeabilities are consistently very low, and elastic moduli generally increase only very slightly with time. Seal formulation guidelines and recommendations for present and future work are presented. 73 references, 25 figures, 61 tables.
- Research Organization:
- Pennsylvania State Univ., University Park (USA). Materials Research Lab.
- DOE Contract Number:
- AC06-76RL01830; AC02-83CH10140
- OSTI ID:
- 5569904
- Report Number(s):
- ONWI-479; ON: DE84004139
- Country of Publication:
- United States
- Language:
- English
Similar Records
Geochemical performance evaluation and characterization of a potential cementitious repository sealing material for application in the Topopah Spring tuff NNWSI investigations
Cementitious mixtures for sealing evaporite and clastic rocks in a radioactive-waste repository. Final report
Related Subjects
36 MATERIALS SCIENCE
CEMENTS
CHEMICAL COMPOSITION
COMPRESSION STRENGTH
EVALUATION
MICROHARDNESS
PERMEABILITY
RADIOACTIVE WASTE DISPOSAL
SEALING MATERIALS
SCREENING
EXPERIMENTAL DATA
SALT DEPOSITS
STABILITY
THEORETICAL DATA
THERMAL CONDUCTIVITY
VISCOSITY
X-RAY DIFFRACTION
BUILDING MATERIALS
COHERENT SCATTERING
DATA
DIFFRACTION
GEOLOGIC DEPOSITS
HARDNESS
INFORMATION
MANAGEMENT
MATERIALS
MECHANICAL PROPERTIES
NUMERICAL DATA
PHYSICAL PROPERTIES
SCATTERING
THERMODYNAMIC PROPERTIES
WASTE DISPOSAL
WASTE MANAGEMENT
052002* - Nuclear Fuels- Waste Disposal & Storage
360603 - Materials- Properties