The paper discusses the CBR Puncture Resistance Test method applied to geomembranes and geotextile/geomembrane systems where the geomembranes are protected by geotextiles. Effects of penetration velocity were analysed using several kinds of geomembranes and a nonwoven needled punched geotextile. The following polymers, PVC, EPDM and IIR (Butyl) were used when testing geomembranes, nd PET when testing geotextiles. The friction interface geotextile/geomern»ranes behavior is also discuted.
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