Water vapour adsorption and desorption in GCLs-Reference-Cited by-同舟云学术

Water vapour adsorption and desorption in GCLs

Published:2016-04 Issue:2 Volume:23 Page:86-99
ISSN:1072-6349
Container-title:Geosynthetics International
language:en
Short-container-title:Geosynthetics International

Author:

Rouf M. A.¹,Bouazza A.²,Singh R. M.³,Gates W. P.⁴,Rowe R. K.⁵

Affiliation:

1. Department of Civil Engineering, 18 Alliance Lane, Monash University, Victoria 3800, Australia, Telephone: +61 3 99058901; Telefax: +61 3 99054944;

2. Department of Civil Engineering, 23 College Walk, Monash University, Victoria 3800, Australia, Telephone: +61 3 99054956; Telefax: +61 3 99054944;(corresponding author)

3. Department of Civil Engineering, 23 College Walk, Monash University, Vic. 3800, Australia, Telephone: +61 3 99054981; Telefax: +613 99054944;

4. Department of Civil Engineering, 18 Alliance Lane, Monash University, Vic. 3800, Australia, Telephone: +61 3 99054664; Telefax: +61 3 99054944;

5. Department of Civil Engineering, Queen's University, Ellis Hall, Kingston Ontario, Canada K7L 3N6, Telephone: +1 613 5333113; Telefax: +1 613 5332128;

Abstract

Super-saturated salt solutions are used to control relative humidity (RH) and to infer the hydration (water uptake and loss) behaviour of three needle-punched geosynthetic clay liners (GCLs) with respect to time under conditions of both free swell and 20 kPa applied stress. It is shown that RH and applied stress play a key role in the hydration behaviour with time when GCL specimens were in equilibrium with water vapour. It was also observed that water uptake and loss was affected by the bentonite form (powdered or granular) and mineralogy of the bentonite. However, the effect of GCL structure (i.e. difference in geotextiles and bonding of needle-punched fibres to the carrier geotextile) on their hydration behaviour for GCLs with similar form of bentonite was not significant for RH ≤ 97.7%. The effect of GCL structure became more apparent at 100% RH (for all GCLs). The results presented in this study can be used to better assess the hydration of GCLs in field applications such as waste containment liners and cover systems at different RH and overburden stress conditions.

Publisher

Thomas Telford Ltd.

Subject

Geotechnical Engineering and Engineering Geology,Civil and Structural Engineering

Link

https://www.icevirtuallibrary.com/doi/pdf/10.1680/jgein.15.00034

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