| Issue |
E3S Web Conf.
Volume 92, 2019
7th International Symposium on Deformation Characteristics of Geomaterials (IS-Glasgow 2019)
|
|
|---|---|---|
| Article Number | 07009 | |
| Number of page(s) | 5 | |
| Section | Behaviour of Unsaturated Geomaterials | |
| DOI | https://doi.org/10.1051/e3sconf/20199207009 | |
| Published online | 25 June 2019 | |
Shrinkage Curves for Powder and Granular Bentonites
1
Nanyang Technological University, School of Civil and Environmental Engineering, 639798 50, Singapore
2
La Trobe University, Department of Civil Engineering and Physical Sciences, Melbourne, Australia
* Corresponding author: cecleong@ntu.edu.sg
Bentonite is one of the most commonly used materials in geotechnical engineering applications especially for isolation purposes due its low permeability and its highly expansive nature. For instance, Geosynthetic Clay Liners (GCL) self-healing ability relies on the swelling properties of the bentonite to close any holes in the GCL while the low permeability of the bentonite serves to reduce the infiltration of leachate to the surrounding soil. However, different types of bentonite have different shrinkage or swelling properties and hence affects the effectiveness of the GCL. A method to assess the wetting/drying induced volume change of the bentonite is through its shrinkage curve. This paper focuses on the shrinkage behaviour of reconstituted granular and powder bentonites which are used in GCL. Photogrammetry method is used to measure the volume change of specimen during drying. The shrinkage curves of the bentonites are then compared with other bentonites from the literature.
© The Authors, published by EDP Sciences, 2019
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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