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Volume Changes of a Thixotropic, Sodium Bentonite Suspension during Sol-Gel-Sol Transition

Duwayne M. Anderson, George F. Leaming and Garrison Sposito
Science
New Series, Vol. 141, No. 3585 (Sep. 13, 1963), pp. 1040-1041
Stable URL: http://www.jstor.org/stable/1712349
Page Count: 2
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Abstract

Dilatometric measurements during the sol-gel-sol transition of an air-free, thixotropic, sodium bentonite suspension revealed a reversible change in volume of about 2.4 $\times $ 10$^{-4}$ percent. The volume of the suspension increased during gelation and decreased when the gel was subsequently liquified. This is taken as evidence of a progressive building up, during gelation, of a water structure less dense than normal.

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