TY - JOUR A1 - Robertson, Daniela T1 - The oxidative resistance of polymeric geosynthetic barriers (GBR-P) used for road and railway tunnels T2 - Polymer testing N2 - The results of autoclave tests according to DIN EN ISO 13438 (method C) and conventional oven tests in line with DIN EN 14575 are presented for the evaluation of the resistance to oxidation of geosynthetic barriers GBR-P based on polyethylene. These GBR-P products are used as a barrier layer against water in road and railway tunnels. The residual mechanical stability of the exposed materials was determined by tensile testing. The remaining activity of the stabiliser was investigated using the OIT method. The results of both accelerating test methods are discussed and compared in detail. Based on autoclave tests at three temperatures (e.g. 60, 70 and 80 °C) and 50 bar oxygen pressure, and additionally two more measurements at 80 °C and 10 and 20 bar oxygen pressure, a modified Arrhenius extrapolation is used for an assessment of the expected service time of one of the GBR-P products. PB - Elsevier Science CY - Amsterdam [u.a.] KW - Geosynthetic barrier KW - Oxidative durability KW - Accelerated ageing KW - Autoclave KW - Oven PY - 2013 UR - https://opus4.kobv.de/opus4-bam/frontdoor/index/index/docId/31442 AN - OPUS4-31442 SN - 0142-9418 VL - 32 IS - 8 SP - 1594 EP - 1602 AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany