Permeating partially hydrated GCLs with jet fuel at temperatures from −20°C and 20°C
The hydraulic conductivity of hydrated and partially hydrated geosynthetic clay liners (GCLs) with respect to Jet Fuel A-1 (Arctic diesel) is examined at −20°C, −5°C, 5°C, and 20°C. Methods developed to hydrate GCLs to specific water contents (60%, 90%, 120%) and subject them to subzero temperatures...
| Published in: | Geosynthetics International |
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| Main Authors: | , , |
| Format: | Article in Journal/Newspaper |
| Language: | English |
| Published: |
Thomas Telford Ltd.
2005
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| Subjects: | |
| Online Access: | http://dx.doi.org/10.1680/gein.2005.12.6.333 https://www.icevirtuallibrary.com/doi/pdf/10.1680/gein.2005.12.6.333 |
| Summary: | The hydraulic conductivity of hydrated and partially hydrated geosynthetic clay liners (GCLs) with respect to Jet Fuel A-1 (Arctic diesel) is examined at −20°C, −5°C, 5°C, and 20°C. Methods developed to hydrate GCLs to specific water contents (60%, 90%, 120%) and subject them to subzero temperatures without the additional uptake of water are described. Results indicate that there are two main mechanisms that affect the hydraulic conductivity of Jet Fuel A-1. For a constant bulk void ratio, as the water content increases, the hydraulic conductivity with respect to Jet Fuel A-1 decreases. Similarly, for a constant water content, as bulk void ratio decreases, the hydraulic conductivity with respect to Jet Fuel A-1 decreases. GCLs at positive temperatures with an initial degree of saturation (S r ) greater then 0.77 had a hydraulic conductivity with respect to Jet Fuel A-1 of less than 10 −9 m/s, whereas GCLs at subzero temperatures with S r > 0.70 had a hydraulic conductivity with respect to Jet Fuel A-1 of less than 2.5 × 10 −10 m/s. Highly saturated (S r > 0.85) GCLs at subzero temperatures were essentially impermeable, having a hydraulic conductivity with respect to Jet Fuel A-1 of less than 10 −12 m/s. |
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