Engineering Performance Evaluation of PVA Geotextiles

초록

Firstly, 3 types of PVA, polyester (PET) and polypropylene (PP) nonwoven geotextiles to be generally used in Korean waste landfills were adopted as test materials. The modified EPA 9090 test method was applied to compare the chemical stability in pH 8 and waste leachate solutions. Chemical stability of these nonwoven geotextiles was estimated by the average retentions of tensile properties before/after immersion. Secondly, PVA geotextile/HDPE geomembrane composites were made to examine the waste landfill related properties. Tensile properties, tear and bursting strengths, AOS (apparent opening size) and permittivity of PVA geotextiles were evaluated, respectively. Ultraviolet stability and chemical resistance to the leachate was evaluated also. Friction property and creep deformation were tested at various loading condition.