Influence of physico-chemical components on the consolidation behavior of soft kaolinites

Rao, Sudhakar and Deepak, G B and Rao, P Raghuveer and Anbazhagan, P (2017) Influence of physico-chemical components on the consolidation behavior of soft kaolinites. In: ACTA GEOTECHNICA, 12 (2). pp. 441-451.

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Abstract

Pore solution salinity has important bearing on engineering behavior of marine sediments as they influence electrochemical stress (A-R) and differential osmotic stress (Delta pi) of the salt-enriched clays. The electrochemical stress (A-R) is contributed by van der Waals (A) attraction and diffuse ion layer repulsion (R) , while the differential osmotic stress (Delta pi) is governed by the differences in dissolved salt concentrations in solutions separated by osmotic membrane. The paper examines the relative influence of differential osmotic stress (Delta pi) and electrochemical stress (A-R) on the consolidation behavior of slurry consolidated kaolinite specimens, which are known to be encountered in recent alluvial marine sediments. Methods are described to evaluate the magnitudes of these physico-chemical components and their incorporation in true effective stress. Results of the study demonstrate that differential osmotic stress finitely contributes to true effective stress. The contribution from differential osmotic stress enables kaolinite specimens to sustain larger void ratio during consolidation.

Item Type:	Journal Article
Publication:	ACTA GEOTECHNICA
Publisher:	SPRINGER HEIDELBERG, TIERGARTENSTRASSE 17, D-69121 HEIDELBERG, GERMANY
Additional Information:	Copy right for this article belongs to the SPRINGER HEIDELBERG, TIERGARTENSTRASSE 17, D-69121 HEIDELBERG, GERMANY
Department/Centre:	Division of Mechanical Sciences > Civil Engineering
Date Deposited:	20 May 2017 05:29
Last Modified:	20 May 2017 05:29
URI:	http://eprints.iisc.ac.in/id/eprint/56901

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