Grout to meet physical and chemical requirements for closure at Hanford grout vaults. Final report
The US Army Engineer Waterways Experiment Station (WES) developed a grout based on portland cement, Class F fly ash, and bentonite clay, for the Hanford Grout Vault Program. The purpose of this grout was to fill the void between a wasteform containing 106-AN waste and the vault cover blocks. Following a successful grout development program, heat output, volume change, and compressive strength were monitored with time in simulated repository conditions and in full-depth physical models. This research indicated that the cold-cap grout could achieve and maintain adequate volume stability and other required physical properties in the internal environment of a sealed vault. To determine if contact with 106-AN liquid waste would cause chemical deterioration of the cold-cap grout, cured specimens were immersed in simulated waste. Over a period of 21 days at 150 F, specimens increased in mass without significant changes in volume. X-ray diffraction of reacted specimens revealed crystallization of sodium aluminum silicate hydrate. Scanning electron microscopy used with X-ray fluorescence showed that clusters if this phase had formed in grout pores, increasing grout density and decreasing its effective porosity. Physical and chemical tests collectively indicate a sealing component. However, the Hanford Grout Vault Program was cancelled before completion of this research. This report summarizes close-out Waterways Experiment Station when the Program was cancelled.
- Research Organization:
- Army Engineer Waterways Experiment Station, Vicksburg, MS (United States). Structures Lab.
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AI05-90OR21921
- OSTI ID:
- 10181093
- Report Number(s):
- DOE/OR/21921-T1; ON: DE94018568; BR: 820200000; TRN: 94:018929
- Resource Relation:
- Other Information: PBD: 21 Jul 1994
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS
HANFORD RESERVATION
RADIOACTIVE WASTE DISPOSAL
RADIOACTIVE WASTE FACILITIES
GROUTING
MATERIALS TESTING
WASTE FORMS
SEALS
LIQUID WASTES
SIMULATION
X-RAY DIFFRACTION
SCANNING ELECTRON MICROSCOPY
EXPERIMENTAL DATA
PROGRESS REPORT
052002
054000
WASTE DISPOSAL AND STORAGE
HEALTH AND SAFETY