HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Articles by Margheim, J. F. Articles by Low, P. F. Search for Related Content PubMed Articles by Margheim, J. F. Articles by Low, P. F. Agricola Articles by Margheim, J. F. Articles by Low, P. F.

Relation Between Rheological Properties and Dry-state b Dimension of Various Na-smectites¹

ABSTRACT

The liquid limits of pastes of five different Na-smectites were determined with the conventional liquid-limit device. In addition, the penetration rate of a Teflon cone into each paste was determined at different water contents by means of a precision penetrometer. The water content at which a curve of penetration rate versus water content showed maximal curvature was called the "critical" water content. Both the liquid limit and "critical" water content were shown to decrease as the b dimension of the Na-smectite increased. Since recent work has shown that the specific surface area of a Na-smectite depends on its dry-state b dimension, plots were made of the liquid limit and critical water content against specific surface area. They showed that both indicators of consistency increased curvilinearly with specific surface area. However, at a given state of consistency, the interparticle distance was not the same in the different smectite-water systems but depended on the b dimension. Reasons for these findings were discussed in relation to the theory of plastic flow.

¹ Journal Paper no. 6782; contribution of the Dept. of Agron., Purdue Univ., Agr. Exp. Sta., West Lafayette, IN, 47907.

² Former Graduate Research Assistant and Professor of Agron., Purdue Univ., respectively.

Received for publication July 11, 1977. Accepted for publication May 25, 1978.