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Insufficient initial hydration of GCLs from some subgrades: Factors and causes

Acikel, A.S., Gates, W.P., Singh, R.M., Bouazza, A. and Rowe, R.K. (2018) Insufficient initial hydration of GCLs from some subgrades: Factors and causes GEOTEXTILES AND GEOMEMBRANES, 46 (6). pp. 770-781.

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Water retention and hydration tests are reported for three needle punched geosynthetic clay liners (GCLs). GCLs hydration and their maximum hydration capacity were assessed against subgrade soils prepared at different initial gravimetric water contents. The subgrade soil mineralogy and particle size distribution, as well as the carrier geotextiles used in GCLs, are shown to have a significant impact on the GCLs hydration behaviour. This work highlights the need to consider the unsaturated properties of both the GCLs and the subgrade soil when assessing the hydration of the GCLs. At gravimetric water contents above the GCL water entry value (≈30%), some forms of GCL configuration may be better than others with respect to ability to hydrate from a given soil. However, the partial hydration of GCL is mostly controlled by the bentonite microstructure for gravimetric water contents below the water entry value of the GCLs.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Civil and Environmental Engineering
Authors :
Acikel, A.S.
Gates, W.P.
Bouazza, A.
Rowe, R.K.
Date : December 2018
Funders : Australian Research Council’s Linkage Projects funding scheme
DOI : 10.1016/j.geotexmem.2018.06.007
Copyright Disclaimer : © 2018 Elsevier Ltd. All rights reserved.
Uncontrolled Keywords : Geosynthetics; Geotextiles; GCL; Mineralogy; Hydration; Water retention curve; Microstructure
Depositing User : Diane Maxfield
Date Deposited : 04 Sep 2019 13:31
Last Modified : 04 Sep 2019 13:31

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