TY - CONF A1 - Retzlaff, J. A1 - Bronstein, Z. A1 - Müller-Rochholz, J. A1 - Böhning, Martin A1 - Robertson, Daniela A1 - Schröder, Hartmut T1 - Oxidative resistance of geosynthetics: practical aspects and developments of testing at elevated temperature and oxygen pressure N2 - Service life of geosynthetics made of polyolefin materials is mainly limited by oxidative degradation. Durability of polyolefin products depend on formulation, morphology resulting from manufacturing, design and particularly on the antioxidants used. Although the fundamental oxidative reactions are known, the complex effect of geosynthetic characteristics and external influences mean that durability assessments require practical tests. The assessment of oxidative durability involves exposure to accelerating conditions as well as the material characterisation with respect to the state of stabilisation and/or degradation (e.g. by tensile testing and/or oxidation induction time). The autoclave test developed by BAM for durability assessments of polyolefin geosynthetics is based on the simultaneous application of moderately elevated temperatures (up to 80 degrees Celsius) and elevated oxygen pressures (up to 5.0 MPa) in combination with a surrounding aqueous medium. Thus this test method provides several advantages in comparison to conventional oven testing, especially with respect to test duration, impact of surrounding environment and the potential to differentiate and rank oxidative resistance between products of very different dimensions (surface/volume) and stabilisation. In view of the increasing demand for durability assessments of geosynthetic products with lifetimes significantly exceeding 25 years, the contribution is focused on practical aspects concerning implementation and optimisation of test procedures, conditions and evaluation of results. Furthermore, advanced approaches based on multiple exposure conditions will also be included and corresponding calculations of expected service life in typical applications will be evaluated with respect to significance and repeatability. Thereby involved standards and recommendations - such as EN ISO 13438, Part C or EAG-EDT - are considered. T2 - EuroGeo4, 4th European Geosynthetics Conference CY - Edinburgh, UK DA - 2008-09-07 KW - Ageing KW - Degradation KW - HDPE KW - Laboratory test KW - Oxidation KW - Polypropylene PY - 2008 IS - Paper 178 SP - 1 EP - 4 AN - OPUS4-18423 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Schröder, Hartmut A1 - Munz, Martin A1 - Böhning, Martin A1 - Lorenz, Edelgard A1 - Kneip, Gisela T1 - New method for testing the resistance to oxidation - Application and Evaluation: Polyolefinic Products T2 - EUROCORR 2006 CY - Maastricht, The Netherlands DA - 2006-09-25 PY - 2006 N1 - Serientitel: EFC-Event – Series title: EFC-Event IS - 280 SP - 1 EP - 8 PB - European Federation of Corrosion CY - Maastricht AN - OPUS4-13706 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Schröder, Hartmut A1 - Munz, Martin A1 - Böhning, Martin T1 - A new method for testing and evaluating the long-tIme resistance to oxidation of polyolefinic products T2 - 13th International Plastics Additives and Compounding Conference "Addcon World 2007" CY - Frankfurt/M. DA - 2007-09-05 PY - 2007 SN - 978-1-84735-018-3 IS - Paper 7 SP - 1 EP - 10 CY - Shawbury AN - OPUS4-15762 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Schröder, Hartmut A1 - Bahr, Horst A1 - Lorenz, Edelgard A1 - Kneip, Gisela A1 - Kunze, Ines A1 - Zeynalov, Eldar T1 - Resistance of polyolefin geosynthetics to oxidationa new accelarated test working at elevated oxygen pressure PY - 2002 SN - 90-5809-529-0 N1 - Geburtsname von Kunze, Ines: Schmücking, I. - Birth name of Kunze, Ines: Schmücking, I. VL - 4 SP - 1455 EP - 1458 PB - Balkema CY - Lisse AN - OPUS4-1901 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Müller-Rochholz, J. A1 - Bronstein, Z. A1 - Schröder, Hartmut A1 - Rybak, Thomas A1 - Zeynalov, Eldar A1 - v. Maubeuge, K. P. ED - Delmas, P. T1 - Long-term behaviour of geosynthetic drains - excavations on landfills after up to 12 years service T2 - 7th International Conference on Geosynthetics (ICG) CY - Nice, France DA - 2002-09-22 PY - 2002 SN - 90-5809-525-8 VL - 2 SP - 565 EP - 568 PB - Balkema CY - Lisse AN - OPUS4-1902 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Schröder, Hartmut A1 - Zeynalov, Eldar A1 - Bahr, Horst A1 - Rybak, Thomas T1 - Analysing the content of antioxidants in PP materials PY - 2002 SN - 0967-3911 SN - 1478-2391 VL - 10 IS - 1 SP - 73 EP - 82 PB - RAPRA Technology Ltd. CY - Shrewsbury AN - OPUS4-1873 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Schröder, Hartmut A1 - Bahr, Horst A1 - Kneip, Gisela A1 - Lorenz, Edelgard A1 - Kunze, Ines A1 - Seifert, Ingetraut T1 - Long-Term-Resistance of PET-Geofibers to Inner and Outer Hydrolysis T2 - Zhongguo Guoji Fei-Zhizaobu/Chanye-Yong Fangzhipin Yantaohui ; China International Nonwovens/Techtextiles Conference CY - Beijing, China DA - 2000-05-23 KW - Hydrolysis KW - PET-Geofibers PY - 2000 N1 - Geburtsname von Kunze, Ines: Schmücking, I. - Birth name of Kunze, Ines: Schmücking, I. SP - 1(?) EP - 17(?) CY - Beijing AN - OPUS4-890 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Schröder, Hartmut A1 - Bahr, Horst A1 - Zeynalov, Eldar T1 - Determination of phenolic antioxidant stabilizers in PP and HDPE by means of an oxidative model reaction T2 - 6th International Plastics Additives and Modifiers Conference ; 6th Addcon World 2000 CY - Basel, Switzerland DA - 2000-10-25 PY - 2000 SN - 1-85957-242-1 IS - Paper 3 SP - 1 EP - 15(?) PB - RAPRA Technology Ltd. CY - Shawbury AN - OPUS4-952 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Schröder, Hartmut A1 - Bahr, Horst A1 - Herrmann, Peter A1 - Kneip, Gisela A1 - Lorenz, Edelgard A1 - Kunze, Ines ED - Cancelli, A. T1 - Durability Of Polyolefine Geosynthetics Under Elevated Oxygen Pressure In Aqueous Liquids T2 - 2nd European Geosynthetics Conference ; 2nd EuroGeo 2000 CY - Bologna, Italy DA - 2000-10-15 KW - Durability KW - Oxidation KW - Oxygen pressure KW - Antioxidant KW - Leaching KW - Elution KW - Mechanical properties PY - 2000 SN - 88-555-2560-3 N1 - Geburtsname von Kunze, Ines: Schmücking, I. - Birth name of Kunze, Ines: Schmücking, I. VL - 1 SP - 459 EP - 465 PB - Pàtron CY - Bologna AN - OPUS4-953 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Schröder, Hartmut T1 - New Method for Testing the Resistance to Oxidation - Application and Evaluation for Polyolefinic Products T2 - Eurocorr 2006 CY - Maastricht, Netherlands DA - 2006-09-24 PY - 2006 AN - OPUS4-13503 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -