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A study of geotechnical properties of Cochin Marine Clays

Jose, Babu T and Sridharan, A and Abraham, Benny Mathews (1988) A study of geotechnical properties of Cochin Marine Clays. In: Marine Geotechnology, 7 (3). pp. 189-209.

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Most of the Greater Cochin area, which is undergoing rapid industrialisation, consists of extremely soft marine clay calling for expensive deep foundations. This paper presents a study on the physical properties and engeering characteristics of Cochin marine clays. These marine clays are characterised by high Atterberg limits and natural water contents. They are moderately sensitive with liquidity indices ranging over 0.46 to 0.87.The grain size distribution shows almost equal fractions of clay and silt size with sand content varying around 20%. Use of a dispersing agent in carrying out grain size distribution test plays an important role. The fabric of these clays had been identified as flocculant. The pore water has low salinity which results in marginal changes in properties on washing.Consolidation test results showed a preconsolidation pressure of up to about 0.5 kg/cm2 with high compression indices. Compression index vs liquid limit yielded a correlation comparable to that of published data. The undisturbed samples have a much larger coefficient of secondary consolidation as a result of flocculant fabric. These clays have very low undrained shear strength.

Item Type: Journal Article
Publication: Marine Geotechnology
Publisher: Taylor and Francis Group
Additional Information: Copyright of this article belongs to Taylor and Francis Group.
Keywords: Activity;Compressibility;Marine Clay;Physical Properties; Shear Strength.
Department/Centre: Division of Mechanical Sciences > Civil Engineering
Date Deposited: 06 Sep 2010 06:22
Last Modified: 22 Feb 2012 09:16
URI: http://eprints.iisc.ac.in/id/eprint/32044

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