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Study of the water-bentonite system by vapour adsorption, immersion calorimetry and X-ray techniques: I. Micropore volumes and internal surface areas, following Dubinin's theory

Published online by Cambridge University Press:  09 July 2018

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

The adsorption and desorption of water, the layer spacing of the montmorillonite with increasing water content and the heat of immersion with water have been measured for a Na-bentonite and two Ca-bentonites. The bentonite-water system is treated in terms of a micropore-filling process. Uptake of water occurs in discrete stages as the montmorillonite structure expands and the internal surface is calculated from these discrete stages of water adsorption.

Type
Research Article
Information
Clay Minerals , Volume 22 , Issue 1 , March 1987 , pp. 1 - 9
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1987

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