Aging of HDPE Geomembrane in Three Composite Landfill Liner Configurations / R. Kerry Rowe in Journal of geotechnical and geoenvironmental engineering, Vol. 134 N°7 (Juillet 2008)  

Aging of HDPE Geomembrane in Three Composite Landfill Liner Configurations [texte imprimé] / R. Kerry Rowe, Auteur ; S. Rimal, Auteur . - 2008 . - pp. 906–916.
Geotechnical and geoenvironmental engineering
Langues : Anglais (eng)
in Journal of geotechnical and geoenvironmental engineering > Vol. 134 N°7 (Juillet 2008) . - pp. 906–916

Mots-clés :	Durability Geomembranes Landfills Liners Service life Temperature
Résumé :	Laboratory-accelerated aging experiments conducted to examine the depletion of antioxidant from a geomembrane (GM) underlain by a geosynthetic clay liner (GCL) are described. Three different “protection” layers between the GM and overlying gravel and leachate are examined: (1) A traditional nonwoven geotextile (GT); (2) a GT-GCL; and (3) a GT-sand-GT layer. The GT-GCL protection layer gives an antioxidant depletion rate 0.59 to 0.66 times slower than the GT layer alone. The GT-sand-GT layer gives depletion rates 0.72–0.75 times that of the conventional GT alone. Based on Arrhenius modeling, the time required for depletion of antioxidants at 35°C is estimated to be 65 years for a GM with a GT-GCL protection layer, 50 years for a GT-sand-GT layer, and 40 years for a conventional GT protection layer. These times are all significantly greater than the depletion time for GM immersed in leachate (10 years) for the geomembrane tested.
En ligne :	http://ascelibrary.org/doi/abs/10.1061/%28ASCE%291090-0241%282008%29134%3A7%2890 [...]