Permeating partially hydrated GCLs with jet fuel at temperatures from −20°C and 20°C. Issue 6 (1st November 2005)

• Record Type: Journal Article
• Authors: Hurst, P.; Rowe, R. K.; Mukunoki, T.
• Is Part Of: Geosynthetics international. Volume 12:Issue 6(2005)
• Page Start: 333
• Page End: 343
• Publication Date: 2005-11-01
• Subjects: Jet fuel; -- Geosynthetics; -- Subzero temperatures; -- Geosynthetic clay liner; -- Hydrocarbons; -- Hydraulic conductivity; Geosynthetics -- Periodicals; Geosynthetics; Periodicals; 624.1892
• DOI: 10.1680/gein.2005.12.6.333
• Languages: English
• ISSNs: 1072-6349

Abstract

Abstract : 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. 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.