In situ grouting of low-level burial trenches with a cement-based grout at Oak Ridge National Laboratory
A technology being evaluated for use in the closure of one of the low-level radwaste burial grounds at ORNL is trench stabilization using a cement-based grout. To demonstrate the applicability and effectiveness of this technology, two interconnecting trenches in SWSA 6 were selected as candidates for in situ grouting with a particulate grout. The primary objective was to demonstrate the increased trench stability (characterized by trench penetration tests) and the decreased potential for leachate migration (characterized by hydraulic conductivity tests) following in situ injection of a particulate grout into the waste trenches. Stability against trench subsidence is a critical issue. For example, construction of impermeable covers to seal the trenches will be ineffectual unless subsequent trench subsidence is permanently suspended. A grout composed of 39% Type 1 Portland cement, 55.5% Class F fly ash, and 5.5% bentonite mixed at 12.5 lb/gal of water was selected. Before the trenches were grouted, the primary characteristics relating to physical stability, hydraulic conductivity, and void volume of the trenches were determined. Their physical stability was evaluated using soil-penetration tests.
- Research Organization:
- Oak Ridge National Lab., TN (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 10145965
- Report Number(s):
- ORNL/TM--11838; ON: DE93012513
- Country of Publication:
- United States
- Language:
- English
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In situ grouting of low-level burial trenches with a cement-based grout at Oak Ridge National Laboratory
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Related Subjects
052002
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
54 ENVIRONMENTAL SCIENCES
540230
BENTONITE
CHEMICAL COMPOSITION
CONTAINMENT SYSTEMS
FLY ASH
GROUND DISPOSAL
GROUND SUBSIDENCE
GROUTING
HYDRAULIC CONDUCTIVITY
LEACHING
LOW-LEVEL RADIOACTIVE WASTES
ORNL
PERFORMANCE
PORTLAND CEMENT
RADIOACTIVE MATERIALS MONITORING AND TRANSPORT
RADIOACTIVE WASTE FACILITIES
SOILS
STABILITY
WASTE DISPOSAL AND STORAGE
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
54 ENVIRONMENTAL SCIENCES
540230
BENTONITE
CHEMICAL COMPOSITION
CONTAINMENT SYSTEMS
FLY ASH
GROUND DISPOSAL
GROUND SUBSIDENCE
GROUTING
HYDRAULIC CONDUCTIVITY
LEACHING
LOW-LEVEL RADIOACTIVE WASTES
ORNL
PERFORMANCE
PORTLAND CEMENT
RADIOACTIVE MATERIALS MONITORING AND TRANSPORT
RADIOACTIVE WASTE FACILITIES
SOILS
STABILITY
WASTE DISPOSAL AND STORAGE