Influence of moisture loss on swell pressure and volumetric strain behaviour of desiccated kaolinitic residual soil specimens

Rao, SM and Rekapalli, M (2022) Influence of moisture loss on swell pressure and volumetric strain behaviour of desiccated kaolinitic residual soil specimens. In: International Journal of Geotechnical Engineering, 16 (1). pp. 55-63.

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Abstract

The present study examines the influence of variations in swell pressure due to moisture loss on the swell and collapse behaviour of residual kaolinitic soil specimens. Double oedometer test (DOT) results revealed that moisture loss from an initially dry soil reduces the swell pressure and renders it more collapsible; conversely, it increases the swell pressure of an initially wet soil and renders it expansive. Furthermore, the ratio of inundation pressure (P) to swell pressure (Ps) (P/Ps) governs the nature of wetting induced volumetric strains. The swell and collapse magnitudes of the unsaturated kaolinitic soils at a given surcharge pressure are predicted from a unified equation (based on P/Ps ratio). Likewise, a proposed equation predicts the swell pressure of desiccated kaolinitic soils (compacted soils that have experienced moisture loss). © 2022 Informa UK Limited, trading as Taylor & Francis Group.

Item Type:	Journal Article
Publication:	International Journal of Geotechnical Engineering
Publisher:	Taylor and Francis Ltd.
Additional Information:	The copyright for this article belongs to the Taylor and Francis Ltd.
Keywords:	collapse; desiccation; kaolinite; moisture content; prediction; residual soil; strain; swelling
Department/Centre:	Division of Mechanical Sciences > Civil Engineering
Date Deposited:	06 Oct 2022 09:21
Last Modified:	06 Oct 2022 09:21
URI:	https://eprints.iisc.ac.in/id/eprint/77168

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