Longevity of borehole and shaft sealing materials: characterization of cement-based ancient building materials
Durability and long-term stability of cements, mortars, and/or concretes utilized as borehole plugging and shaft sealing materials are of present concern in the national effort to isolate and contain nuclear waste within deep geological repositories. The present study consists of a preliminary examination of selected ancient, old, and modern building materials (14 specimens) and was intended to document and explain the remarkable durability of these portland cement-related materials. This study has provided insights into reasons for the durability of certain structures and also into the long-term stability of calcium silicate binders (cements) used in archaeologic materials. These data were combined with knowledge obtained from the behavior of modern portland cements and natural materials to evaluate the potential for longevity of such materials in a borehole environment. A multimethod analysis was used and included: macroscopic and microscopic (petrographic and SEM) analyses, chemical analyses, and x-ray diffraction analyses. 61 figures, 11 tables.
- Research Organization:
- Pennsylvania State Univ., University Park (USA). Materials Research Lab.
- DOE Contract Number:
- AC06-76RL01830
- OSTI ID:
- 6724856
- Report Number(s):
- ONWI-202; ON: DE83000730
- Country of Publication:
- United States
- Language:
- English
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Longevity of borehole and shaft sealing materials: characterization of ancient cement based building materials
Characterization of cement-based ancient building materials in support of repository seal materials studies
Related Subjects
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
ARCHAEOLOGICAL SPECIMENS
BOREHOLES
BUILDING MATERIALS
CAVITIES
CEMENTS
CLOSURES
COHERENT SCATTERING
CRYSTAL STRUCTURE
DIFFRACTION
ELECTRON MICROSCOPY
EVALUATION
MANAGEMENT
MATERIALS
MICROSCOPY
MICROSTRUCTURE
MORTARS
PHASE STUDIES
PORTLAND CEMENT
RADIOACTIVE WASTE STORAGE
SCANNING ELECTRON MICROSCOPY
SCATTERING
SEALING MATERIALS
STABILITY
STORAGE
UNDERGROUND STORAGE
WASTE MANAGEMENT
WASTE STORAGE
X-RAY DIFFRACTION