Investigation of the Behavior of Geosynthetic Clay Liners Subjected to Thermal Gradients in Basal Liner Applications

2008 ◽  
pp. 121-121-13 ◽  
Author(s):  
JM Southen ◽  
RK Rowe
Keyword(s):  
Thermal Gradients ◽  
Geosynthetic Clay Liners ◽  
Clay Liners

scholarly journals Insights into Desiccation and Self-Healing of Bentonite in Geosynthetic Clay Liners under Thermal Loads

2019 ◽  
Vol 92 ◽  
pp. 03006
Author(s):  
Abbas El-Zein ◽  
Bowei Yu ◽  
Ali Ghavam-Nasiri
Keyword(s):  
Hydraulic Conductivity ◽  
Mechanical Model ◽  
Thermal Gradients ◽  
Self Healing ◽  
Transient Phase ◽  
Geosynthetic Clay Liners ◽  
Clay Liners ◽  
Sodium Bentonite ◽  
Mechanical Loads ◽  
Numerical Investigations

Geosynthetic Clay Liners (GCLs) are widely used for protecting groundwater from pollution sources at the surface, including applications in which they are subject to significant thermal gradients. Hence, sodium bentonite in the GCL may undergo significant dehydration and cracking, and the GCL might fail as a result. The paper presents outcomes of a set of recent experimental and numerical investigations exploring the propensity of bentonite to desiccate and self-heal, as well as means of mitigating the effect of thermal gradients on the hydraulic conductivity of GCLs. An elasto-plastic thermo-hydro-mechanical model was found to yield reasonable predictions of experimental behaviour, except for the transient phase of pre-heating hydration. Introducing an airgap between the GCL and the heat source can reduce the extent of desiccation and its effects on hydraulic conductivity. However, the effectiveness of the solution will depend on other factors including subgrade, magnitude of thermal and mechanical loads and type of GCL.

scholarly journals Kaolin based protective barrier in municipal landfills against adverse chemo-mechanical loadings

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Partha Das ◽  
Tadikonda Venkata Bharat
Keyword(s):  
Ionic Strength ◽  
High Ionic Strength ◽  
The Self ◽  
Design Parameters ◽  
Layered System ◽  
Geosynthetic Clay Liners ◽  
Clay Liners ◽  
Landfill Liner ◽  
First Time ◽  
Applied Stresses

AbstractIn this work, we assess the self-sealing and swelling ability of the compacted granular bentonite (GB) under an inorganic salt environment and induced overburden stresses from the landfill waste. The laboratory permeation tests with high ionic strength salt solutions reveal that the GB fails to seal and exhibits a significant mechanical collapse under different applied stresses. The applicability of GB in the form of geosynthetic clay liners as the bottom liner facilities in landfills that produce high ionic strength salt leachates, therefore, remains a serious concern. We propose an additional barrier system based on kaolin, for the first time, to address this problem. The proposed kaolin-GB layered system performs satisfactorily in terms of its sealing and swelling ability even in adverse saline conditions and low overburden stresses. The kaolin improves the osmotic efficiency of the self and also helps the underlying GB layer to seal the inter-granular voids. The estimated design parameters by through-diffusion test suggest that the kaolin-GB layered system effectively attenuates the permeant flux and suitable as a landfill liner.

Long-term shear strength of geosynthetic clay liners

2008 ◽  
Vol 26 (2) ◽  
pp. 130-144 ◽  
Author(s):  
Werner Müller ◽  
Ines Jakob ◽  
Stefan Seeger ◽  
Renate Tatzky-Gerth
Keyword(s):  
Shear Strength ◽  
Geosynthetic Clay Liners ◽  
Clay Liners

Challenges of the Filter Paper Suction Measurements in Geosynthetic Clay Liners: Effects of Method, Time, Capillarity, and Hysteresis

2021 ◽  
Vol 45 (2) ◽  
pp. 20200168
Author(s):  
A. S. Acikel ◽  
A. Bouazza ◽  
R. M. Singh ◽  
W. P. Gates ◽  
R. K. Rowe
Keyword(s):  
Filter Paper ◽  
Geosynthetic Clay Liners ◽  
Clay Liners

Effect of incineration ash leachates on the hydraulic conductivity of bentonite-polymer composite geosynthetic clay liners

2022 ◽  
Vol 139 ◽  
pp. 25-38
Author(s):  
Christian Wireko ◽  
Tarek Abichou ◽  
Kuo Tian ◽  
Binte Zainab ◽  
Zhiming Zhang
Keyword(s):  
Hydraulic Conductivity ◽  
Polymer Composite ◽  
Geosynthetic Clay Liners ◽  
Clay Liners

Field Study of Installation Damage for Geosynthetic Clay Liners

1998 ◽  
Vol 5 (5) ◽  
pp. 491-520 ◽  
Author(s):  
P.J. Fox ◽  
E.J. Triplett ◽  
R.H. Kim ◽  
J.T. Olsta
Keyword(s):  
Field Study ◽  
Geosynthetic Clay Liners ◽  
Clay Liners

Occurrence and effect of bentonite migration in geosynthetic clay liners

2004 ◽  
Vol 11 (4) ◽  
pp. 296-310 ◽  
Author(s):  
T. D. Stark ◽  
H. Choi ◽  
R. Akhtarshad
Keyword(s):  
Geosynthetic Clay Liners ◽  
Clay Liners
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