Compacted GMZ bentonite/sand mixture is considered as a potential bufer/backfill material for high-level radioactive waste disposal in China. Because bufer/backfill material can be exposed both to groundwater and in situ stresses, further research is necessary to understand the coupled impacts of these two factors. In this study, the coupled efects of …
The effects of salt solution concentration and vertical stress during saturation on the volume change of GMZ01 bentonite specimens were investigated in terms of swelling strain, elastic compressibility parameter, …
The combined effects of temperature and vertical pressure on swelling strain development and microstructure evolution were analysed. The changes of different pore families were compared to reveal mechanisms of temperature effects on swelling under different vertical pressures.
This study investigated the hydraulic conductivity and microscopic properties of two backfills, conventional sand/bentonite (SB) and sand/xanthan gum (XG)-amended bentonite/sand (XG-SB), for use in vertical cutoff walls for controlling lateral migration of lead-contaminated groundwater. A series of laboratory experiments were conducted on …
Investigation of the effects of salt solution concentration and vertical stress during saturation on the volume change behavior of compacted bentonite…
The control tests are essential for quality assurance of vertical bentonite barriers. They should mainly verify the continuity of a barrier wall, the demanded barrier depth related to natural ...
Vertical cutoff walls are frequently used for in situ containment of groundwater contaminant plumes or for secondary containment at waste disposal sites. Amending backfills for soil-bentonite (SB) cutoff walls with reactive media to increase attenuation of target contaminants has been proposed as a method for enhancing such …
Traditionally, the SB slurry trench cutoff walls are constructed by excavating a narrow vertical trench (0.6 to 1.2 m wide) and extending and embedding in the underlying low permeable stratum. While trenching, sodium bentonite (Na-bentonite)-water slurry is filled simultaneously into the trench to maintain stability during the excavation.
Compacted GMZ bentonite/sand mixture is considered as a potential buffer/backfill material for high-level radioactive waste disposal in China. Because buffer/backfill material can be exposed both to groundwater and in situ stresses, further research is necessary to understand the coupled impacts of these two factors. In this …
bentonite-based drilling fluid is hydrated ex situ and yields prior to commencing directional drilling; and. bentonite is a component of the directional drilling mud system, not the sole component. A "seal" is never formed by bentonite in a horizontal well and in addition Directional Technologies, Inc. uses a proprietary process to develop ...
Slag-cement–bentonite (SCB) slurry has been widely used for the construction of vertical cutoff walls to restrain the movement of groundwater at conta…
Soil-bentonite (SB) vertical slurry cutoff wall is a useful treatment for urban industrial contaminated sites. Due to the clay-heavy metal interaction, significant changes would occur in the engineering behavior of SB cutoff walls. However, previous study is limited to kaolinitic soils or montmorillonitic soils along using solidum chloride and/or …
To use high dense compacted bentonite or bentonite-sand mixture material are accepted as engineered barriers for high level nuclear waste disposal waste. The bentonite as engineered barrier is initially in unsaturated condition before pore water coming from natural host rock. The bentonite subjected to thermo-hydro-mechanical actions by …
Semantic Scholar extracted view of "Diffusion through soil-bentonite backfill from a constructed vertical cutoff wall" by K. Sample-Lord et al.
