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Published in: Geotechnical and Geological Engineering 6/2012

01-12-2012 | Original Paper

The Influence of Placement Conditions on the Swelling of Variable Clays

Author: Muawia A. Dafalla

Published in: Geotechnical and Geological Engineering | Issue 6/2012

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Abstract

The swelling of clay when it is subjected to moisture increase is a complicated process found to be influenced by several factors. The clay’s level of response is highly dependent on its mineralogical composition and structure. Practicing geotechnical engineers use the placement state and general index properties to forecast the swelling behavior of the soils. The purpose of this study was to investigate the influence of placement conditions on various clays and to demonstrate that the swelling of a particular clay type should not be predicted using information and trends obtained for other clays with different origins. Clay from Saudi Arabia was used to investigate the influence of initial moisture content and initial dry density on swelling. The prediction models created by other researchers were compared to the measured values in this study. The swelling behavior of both initially dry and wet prepared bentonite was examined, and the rate at which swelling developed in the bentonite clay was studied. The role of clay content in the volume change of sand–bentonite mixtures was also investigated. It was concluded that the prediction of clay-swelling parameters should not be based on the properties of other clays with different origins and mineralogical compositions. The trends published in the literature should be taken as a general guide only, and the influence of moisture content and dry density on swelling should be verified for individual sites. Because clay content significantly influences the overall volume change, it should be carefully assessed in each case.
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Metadata
Title
The Influence of Placement Conditions on the Swelling of Variable Clays
Author
Muawia A. Dafalla
Publication date
01-12-2012
Publisher
Springer Netherlands
Published in
Geotechnical and Geological Engineering / Issue 6/2012
Print ISSN: 0960-3182
Electronic ISSN: 1573-1529
DOI
https://doi.org/10.1007/s10706-012-9544-z