Durability of fluorinated high density polyethylene geomembrane in the Arctic |
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Authors: | R. Kerry Rowe S. Rimal D.N. Arnepalli R.J. Bathurst |
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Affiliation: | 1. GeoEngineering Centre at Queen''s – RMC, Department of Civil Engineering, Queen''s University, Kingston, Ontario, Canada K7L 3N6;2. Golder Associates, 2390 Argentia Road, Mississauga, Ontario, Canada L5N 5Z7;3. Department of Civil Engineering, IIT Madras, Chennai 600036, India;4. GeoEngineering Centre at Queen''s – RMC, Department of Civil Engineering, Royal Military College of Canada, Kingston, Ontario, Canada K7K 7B4 |
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Abstract: | A series of fluorinated high density polyethylene (f-HDPE) geomembrane (GM) samples of different thickness (1, 1.5 and 2.5 mm) was exhumed from the backfill immediately upstream of a barrier system constructed to contain a hydrocarbon spill in the Canadian Arctic. The samples were tested for oxidation induction time (OIT), crystallinity, melt index (MI) and tensile properties. The results of these tests are reported and it is shown that the durability of the GM was maintained well beyond the initial 3-year design life of the barrier system. Based on 7 years of field data, the std-OIT depletion time for the 1.5 mm thick GM used in the barrier system was inferred to be over 140 years while the antioxidant depletion time based on the HP-OIT is estimated to be about 200 years. No significant temporal changes in the crystallinity, MI or tensile properties of the exhumed GM samples were detected. |
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Keywords: | Geomembrane Jet fuel Ageing Antioxidants Fluorination Oxidation induction time |
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