Water retention characteristics of swelling clays in different compaction states

Iyer, Kannan K. R and Joseph, Jeevan and Lopes, B. C. F. L and Singh, D. N. and Tarantino, Alessandro (2017) Water retention characteristics of swelling clays in different compaction states. Geomechanics and Geoengineering. ISSN 1748-6033

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    Abstract

    The soil water retention (SWR) characteristics of the clays play an important role in controlling their engineering behaviour, particularly, in the unsaturated state. Although, researchers have attempted to understand the water retention characteristics of the clays in their reconstituted or remoulded state, such studies are rare for the clays in their intact state. In this context, it becomes important to understand the influence of initial state of compaction, which would create different pore- and fabric- structure (viz., microstructure), on the water retention characteristics of the clays. With this in view, SWR behaviour was determined experimentally for the swelling clays (dried from different compaction states, viz., intact, reconstituted and remoulded) by employing Dewpoint Potentiameter (WP4C®). The changes in the pore-size distribution of the clays at different stages of drying cycle were also studied by employing the Mercury Intrusion Porosimetry. The study reveals that the SWR curves for the intact and reconstituted specimens of the clays converge beyond a certain stage of drying. Also, a critical analysis of changes in the pore structure of the swelling clay specimens, during drying, indicates that the progressively deforming pore structure play an important role in controlling its water retention characteristics to a great extent.

    Author(s):Iyer, Kannan K. R, Joseph, Jeevan, Lopes, B. C. F. L ORCID logoORCID: https://orcid.org/0000-0001-7669-7236, Singh, D. N. and Tarantino, Alessandro ORCID logoORCID: https://orcid.org/0000-0001-6690-748X
    Item type:Article
    ID code:61036
    Keywords:swelling clays, state of compaction, soil-water retention curve, Dew point Potentiometer, microstructural studies, Geology, Environmental engineering, Geotechnical Engineering and Engineering Geology
    Subjects:Science > Geology
    Technology > Engineering (General). Civil engineering (General) > Environmental engineering
    Department:Faculty of Engineering > Civil and Environmental Engineering
    Depositing user: Pure Administrator
    Date deposited:22 Jun 2017 08:20
    Last modified:04 Sep 2019 00:54
    Related URLs:
    URI:https://strathprints.strath.ac.uk/id/eprint/61036
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