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Study of the water-bentonite system by vapour adsorption, immersion calorimetry and X-ray techniques: II. Heats of immersion, swelling pressures and thermodynamic properties

Published online by Cambridge University Press:  09 July 2018

G. Kahr ,
F. Kraehenbuehl ,
H. F. Stoeckli  and
M. Müller-Vonmoos
G. Kahr
Affiliation:
Institute of Foundation Engineering and Soil Mechanics, Laboratory for Clay Mineralogy, Federal Institute of Technology, CH-8092 Zürich
F. Kraehenbuehl
Affiliation:
Chemistry Department, University of Neuchâtel, CH-2000 Neuchâtel, Switzerland
H. F. Stoeckli
Affiliation:
Chemistry Department, University of Neuchâtel, CH-2000 Neuchâtel, Switzerland
M. Müller-Vonmoos
Affiliation:
Institute of Foundation Engineering and Soil Mechanics, Laboratory for Clay Mineralogy, Federal Institute of Technology, CH-8092 Zürich
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Abstract

A number of thermodynamic properties were obtained from the determination of adsorption isotherms and enthalpies of immersion for systems with water and Na- and Ca-bentonites. Entropy differences were calculated by combining the enthalpies of immersion and the changes in free energy derived from the adsorption isotherms. The swelling pressures, also calculated from the water adsorption isotherms, are in satisfactory agreement with the experimental data.

Type
Research Article
Information
Clay Minerals , Volume 25 , Issue 4 , December 1990 , pp. 499 - 506
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1990

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