Journal
APPLIED CLAY SCIENCE
Volume 41, Issue 3-4, Pages 181-189Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.clay.2007.11.001
Keywords
Thermal conductivity; Compacted bentonite; Experimental data; Correlation
Funding
- Ecole Nationale des Ponts et Chaussees (ENPC)
- French Electricity Company (EDF)
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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 other existing methods using experimental data on several compacted bentonites. (C) 2007 Elsevier B.V All rights reserved.
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