Swelling behaviour of soil-bentonite mixtures

Sivapullaiah, PV and Sridharan, A and Stalin, VK (1996) Swelling behaviour of soil-bentonite mixtures. In: Canadian Geotechnical Journal, 33 (05). pp. 808-814.

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Abstract

Studies on the swelling behaviour of mixtures of bentonite clay and nonswelling coarser fractions of different sizes and shapes reveal that observed swelling occurs only after the voids of the nonswelling particles are filled up with swollen clay particles. The magnitude of the swell within the voids, called intervoid swelling is large when the size and percentage of the nonswelling coarser fraction is large. The observable swell, after intervoid swelling, is called primary swelling and follows a rectangular hyperbolic relationship with time. The total swell per gram of the clay decreases with an increase in the size of the nonswelling fraction and with a decrease in the percentage of swelling clay. Time-swell relationships show that swelling continues to occur for a long time after the primary swelling, and this is called secondary swelling.

Item Type:	Journal Article
Publication:	Canadian Geotechnical Journal
Publisher:	National Research Council, Research press
Additional Information:	Copyright of this article belongs to National Research Council, Research press.
Keywords:	clay;expansive soil;swelling;time factor.
Department/Centre:	Division of Mechanical Sciences > Civil Engineering
Date Deposited:	09 Dec 2009 05:44
Last Modified:	22 Oct 2018 12:24
URI:	http://eprints.iisc.ac.in/id/eprint/19265

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