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The effect of temperature on the swelling of montmorillonite

Published online by Cambridge University Press:  09 July 2018

F. Zhang ,
Z. Z. Zhang ,
P. F. Low  and
C. B. Roth
F. Zhang
Affiliation:
Agronomy Department, Purdue University, West Lafayette, Indiana 47907, USA
Z. Z. Zhang
Affiliation:
Agronomy Department, Purdue University, West Lafayette, Indiana 47907, USA
P. F. Low
Affiliation:
Agronomy Department, Purdue University, West Lafayette, Indiana 47907, USA
C. B. Roth
Affiliation:
Agronomy Department, Purdue University, West Lafayette, Indiana 47907, USA
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Abstract

The effect of temperature on the swelling of clay was studied by determining (1) the relation between the interlayer spacing, λ, and the swelling pressure,Π, at different values of the temperature, T, using the method of Viani et al. (1983) as modified by Wu et al. (1989); (2) the relation between λ and T at different values of Π; and (3) the relationship between Π and mw/mc, the mass ratio of water to clay, at different values of T using the method of Low (1980). The results showed that λ was essentially independent of T but that mw/mc decreased slightly with T at any value of Π. Such results are not consistent with electric double-layer theory. Therefore, it was concluded that the decrease in mw/mc with increasing T was due primarily to the thermal breakdown and consequent loss of water from the larger pores outside of the interlayer region.

Type
Research Article
Information
Clay Minerals , Volume 28 , Issue 1 , March 1993 , pp. 25 - 31
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1993

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