Experimental characterization and stability of salt- and nonsalt-containing grouts and mortars (BCT-1F- and BCT-1FF-related)
Selected cementitious formulations related to the BCT series (mixtures 83-03 and 83-06) were prepared as candidate salt repository sealing materials for both salt- and non-salt-bearing strata. Mixture 83-03 is a salt-containing mixture related to BCT-1F except that 83-03 is a dense sanded grout containing quartz sand. Mixture 83-06 resembles BCT-1FF except that 83-06 is a siliceous sanded grout containing both quartz sand and a small percentage of micron-sized silica flour. In general, mixtures 83-03 and 83-06 are representative of either expansive salt-containing mixtures (83-03, BCT-1F, 83-05) or salt-free mixtures (82-30, 83-06, BCT-1FF). On the whole, the grouts in either group have low permeabilities and high strengths and elastic moduli, although the salt-free mixtures are stronger and have higher moduli than the saline materials. Thermodynamic stability of the expansive phase, ettringite, is discussed, and the implications of its stability for developing and maintaining a seal are considered. 7 refs., 21 figs., 7 tabs.
- Research Organization:
- Pennsylvania State Univ., University Park (USA). Materials Research Lab.
- DOE Contract Number:
- AC02-83CH10140
- OSTI ID:
- 5847473
- Report Number(s):
- BMI/ONWI-568; ON: DE85012339
- 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
360602 -- Other Materials-- Structure & Phase Studies
360603 -- Materials-- Properties
ALKALINE EARTH METAL COMPOUNDS
BUILDING MATERIALS
BULK DENSITY
CALCIUM COMPOUNDS
CALCIUM SULFATES
CEMENTS
CHEMICAL COMPOSITION
COMPRESSION STRENGTH
CURING
DATA
DENSITY
DUCTILITY
EXPANSION
EXPERIMENTAL DATA
GROUTING
INFORMATION
MATERIALS
MECHANICAL PROPERTIES
MEDIUM TEMPERATURE
MIXING
MORTARS
NUMERICAL DATA
OXYGEN COMPOUNDS
PERMEABILITY
PHASE STUDIES
PHYSICAL PROPERTIES
PORTLAND CEMENT
RHEOLOGY
SEALING MATERIALS
STRESSES
SULFATES
SULFUR COMPOUNDS
TENSILE PROPERTIES
THERMAL CONDUCTIVITY
THERMODYNAMIC PROPERTIES
YOUNG MODULUS