Choice of French Clays as Engineered Barrier Cokponents for Waste Disposal

Coulon, H.; Lajudie, A.; Debrabant, P.; Atabek, R.; Jorda, M.; Andre-Jehan, R.

doi:10.1557/proc-84-813

Cited by 16 publications

(10 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Several works have been done previously to study the thermal conductivity of compacted bentonites. Measured data can be found in the works of Villar (2000) on Febex bentonite, Ould-Lahoucine et al (2002) on Kunigel bentonite, Madsen (1998) on MX80 bentonite, Coulon et al (1987) on several smectite-based clays. These measurements show that the thermal conductivity of compacted bentonites depends on the dry density, the water content, and the mineralogical composition.…”

Section: Introductionmentioning

confidence: 99%

A study on the thermal conductivity of compacted bentonites

Tang

Cui

Lê

2008

Applied Clay Science

205

View full text Add to dashboard Cite

Thermal conductivity of compacted bentonite is one of the most important properties in the design of high-level radioactive waste repositories where this material is proposed for use as a buffer. In the work described here, a thermal probe based on the hot wire method was used to measure the thermal conductivity of compacted bentonite specimens. The experimental results were analyzed to observe the effects of various factors (i.e. dry density, water content, hysteresis, degree of saturation and volumetric fraction of soil constituents) on the thermal conductivity. A linear correlation was proposed to predict the thermal conductivity of compacted bentonite based on experimentally observed relationship between the volumetric fraction of air and the thermal conductivity. The relevance of this correlation was finally analyzed together with others existing methods using experimental data on several compacted bentonites

show abstract

Section: Introductionmentioning

confidence: 99%

A study on the thermal conductivity of compacted bentonites

Tang

Cui

Lê

2008

Applied Clay Science

205

View full text Add to dashboard Cite

show abstract

“…Bentonite has been widely studied as a primary sealing material for nuclear waste repositories (IAEA, 1990;Pusch and Bergstrom, 1980;Pusch, 1994;Coulon et al, 1987;Brenner, 1988;Bucher et al, 1986;Dixon et al, 1985;Butcher, 1994;Pfeifle, 1990). The swelling, longevity, and flow properties of bentonites and bentonite mixtures with sand or crushed rock have been extensively characterized with distilled deionzied water as the permeate.…”

Section: Discussionmentioning

confidence: 99%

“…Bentonite has been studied as a sealing material in several nuclear waste repository programs. Extensive studies on sealing with bentonite have been conducted for the Swedish, Swiss, Canadian, German, and French programs (IAEA, 1990;Pusch and Bergstrom, 1980;Pusch, 1994;Coulon et al, 1987;Brenner, 1988;Bucher et al, 1986;Dixon et al, 1985).…”

Section: Introductionmentioning

confidence: 99%

Bentonite as a waste isolation pilot plant shaft sealing material

Daemen¹,

Ran²

1996

View full text Add to dashboard Cite

Current designs of the shaft sealing system for the Waste Isolation Pilot Plant (WIPP) propose using bentonite as a primary sealing component (DOE/WIPP, 1995). The shaft sealing designs anticipate that compacted bentonite sealing components can perform through the 10,000-year regulatory period and beyond. To evaluate the acceptability of bentonite as a sealing material for the WIPP, this report identifies references that deal with the properties and characteristics of bentonite that may affect its behavior in the WIPP environment. This report reviews published studies that discuss using bentonite as sealing material for nuclear waste disposal, environmental restoration, toxic and chemical waste disposal, landfill liners, and applications in the petroleum industry. This report identifies the physical and chemical properties, stability and seal construction technologies of bentonite seals in shafts, especially in a saline brine environment. This report focuses on permeability, swelling pressure, strength, stiffness, longevity, and densification properties of bentonites.

show abstract

“…ermal conductivity is the basic property of a material to conduct heat which depends mainly upon its composition, pore fluid, density, environment temperature, and texture [19]. Coulon et al [20] have measured this property of 18 smectite clays from 14 deposits, and based on these measurement results, they claimed that the value of the thermal conductivity was jointly influenced by soil parameters such as the water content, the dry density, the microstructure of clay samples, and the mineral composition of the soil as well. A large volume of measured data has been found in the works of Zhu et al [21] on GMZ bentonite, and the similar conclusion has been drawn.…”

Section: Introductionmentioning

confidence: 99%

Thermal Conductivity of Compacted GO-GMZ Bentonite Used as Buffer Material for a High-Level Radioactive Waste Repository

Chen

Liu

et al. 2018

Advances in Civil Engineering

View full text Add to dashboard Cite

In China, Gaomiaozi (GMZ) bentonite serves as a feasible buffer material in the high-level radioactive waste (HLW) repository, while its thermal conductivity is seen as a crucial parameter for the safety running of the HLW disposal. Due to the tremendous amount of heat released by such waste, the thermal conductivity of the buffer material is a crucial parameter for the safety running of the high-level radioactive waste disposal. For the purpose of improving its thermal conductivity, this research used the graphene oxide (GO) to modify the pure bentonite and then the nanocarbon-based bentonite (GO-GMZ) was obtained chemically. The thermal conductivity of this modified soil has been measured and investigated under various conditions in this study: the GO content, dry density, and water content. Researches confirm that the thermal conductivity of the modified bentonite is codetermined by the three conditions mentioned above, namely, the value of GO content, dry density, and water content. Besides, the study proposes an improved geometric mean model based on the special condition to predict the thermal conductivity of the compacted specimen; moreover, the calculated values are also compared with the experimental data.

show abstract

Choice of French Clays as Engineered Barrier Cokponents for Waste Disposal

Cited by 16 publications

References 2 publications

A study on the thermal conductivity of compacted bentonites

A study on the thermal conductivity of compacted bentonites

Bentonite as a waste isolation pilot plant shaft sealing material

Thermal Conductivity of Compacted GO-GMZ Bentonite Used as Buffer Material for a High-Level Radioactive Waste Repository

Contact Info

Product

Resources

About