Gas permeability of geosynthetic clay liners

2010 ◽  
pp. 127-142 ◽  
Author(s):  
A Bouazza
Keyword(s):  
Gas Permeability ◽  
Geosynthetic Clay Liners ◽  
Clay Liners

Gas permeability of geosynthetic clay liners

2000 ◽  
Vol 18 (2-4) ◽  
pp. 235-250 ◽  
Author(s):  
G Didier ◽  
A Bouazza ◽  
D Cazaux
Keyword(s):  
Gas Permeability ◽  
Geosynthetic Clay Liners ◽  
Clay Liners

Measurement of Gas Permeability in Geosynthetic Clay Liners in Transient Flow Mode

2011 ◽  
Vol 34 (1) ◽  
pp. 103000 ◽  
Author(s):  
L. D. Suits ◽  
T. C. Sheahan ◽  
Heraldo Nunes Pitanga ◽  
Patrick Pierson ◽  
Orencio Monje Vilar
Keyword(s):  
Transient Flow ◽  
Gas Permeability ◽  
Flow Mode ◽  
Geosynthetic Clay Liners ◽  
Clay Liners

scholarly journals Gas flow unified measurement system for sequential measurement of gas diffusion and gas permeability of partially hydrated geosynthetic clay liners

2016 ◽  
Vol 53 (6) ◽  
pp. 1000-1012 ◽  
Author(s):  
Md A. Rouf ◽  
Abdelmalek Bouazza ◽  
Rao M. Singh ◽  
Will P. Gates ◽  
R. Kerry Rowe
Keyword(s):  
Water Content ◽  
Measurement System ◽  
Gas Flow ◽  
Gas Permeability ◽  
Gas Diffusion ◽  
Degree Of Saturation ◽  
Geosynthetic Clay Liners ◽  
Clay Liners ◽  
Sequential Measurement ◽  
Gravimetric Water Content

A gas flow unified measurement system (UMS-G) for sequential measurement of gas diffusion and gas permeability of geosynthetic clay liners (GCLs) under applied stress conditions (2 to 20 kPa) is described. Measurements made with the UMS-G are compared with measurements made with conventional experimental devices and are found to give similar results. The UMS-G removes the need to rely on two separate systems and increases further the reliability of the gas properties’ measurements. This study also shows that the gas diffusion and gas permeability reduce greatly with the increase of both gravimetric water content and apparent degree of saturation. The effect of applied stress on gas diffusion and gas permeability is found to be more pronounced at gravimetric water content greater than 60%. These findings suggest that at a nominal overburden stress of 20 kPa, the GCL used in the present investigation needs to be hydrated to 134% gravimetric water content (65% apparent degree of saturation) before gas diffusion and gas permeability drop to 5.5 × 10−11 m2·s−1 and 8.0 × 10−13 m·s−1, respectively, and to an even higher gravimetric water content (apparent degrees of saturation) at lower stress.

scholarly journals GAS PERMEABILITY OF GEOSYNTHETIC CLAY LINERS

2016 ◽  
Vol 32 (1) ◽  
pp. 7-15 ◽  
Author(s):  
Helena ć Vučenovi ◽  
◽  
Dubravko Domitrović ◽  
Biljana Kovačević-Zelić ◽  
◽  
...  
Keyword(s):  
Gas Permeability ◽  
Geosynthetic Clay Liners ◽  
Clay Liners

An apparatus to measure gas permeability of geosynthetic clay liners

2003 ◽  
Vol 21 (2) ◽  
pp. 85-101 ◽  
Author(s):  
Abdelmalek Bouazza ◽  
Thaveesak Vangpaisal
Keyword(s):  
Gas Permeability ◽  
Geosynthetic Clay Liners ◽  
Clay Liners

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.

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