The following three causesof-degradation were considered in the present paper: -installation, chemical aggression and creep. The results obtained show that PET woven high strength geotextile used seems to be mainly aff P.cted by installation damage. At temperature below vitreous transition and with usual tensile force applied, the creep s not contribute significantly to the deformation of the PET, but is always necessary to asses the effects of coatings.
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