TY - CONF A1 - Helm, C. A1 - Eichler, Thorsten A1 - Raupach, M. A1 - Isecke, Bernd T1 - Time dependency of current and potential distribution during the cathodic protection of RC structures N2 - Cathodic protection (CP) is a common method for rehabilitation of reinforced concrete structures suffering from Chloride induced corrosion. A sufficient protection of the corroding rebar can be ensured by use of several protection criteria. The use of these assessment criteria, in particular the so called 100 mV-criterion, can lead to erroneous resuits for certain unconventional arrangements of rebar and cp anode. Therefore a joint research project of the Institute for Building Materials Research, RWTH-Aachen University, Germany, (ibac) and the Federal Institute for Materials Research and Testing, Berlin, Germany, (BAM) has been set up to determine the applicability of CP under arbitrary geometrical conditions. A special focus was set on the applicability of surface applied anode Systems for protection of the reinforcement of structures opposite to the accessible side (e.g. outer side of tunnel Shell, Bridge deck protected from inside a box girder) In this paper, the impact of the time dependent changes of the Polarisation behaviour of the rebar on the current and potential distribution is shown by means of parametric studies using the FEM method. T2 - EUROCORR 2011 - Developing solutions for the global challenge CY - Stockholm, Sweden DA - 04.09.2011 KW - Cathodic protection KW - Long time effects of cathodic polarisation KW - FEM-modelling KW - Steel in concrete PY - 2011 SP - 1 EP - 11 AN - OPUS4-25326 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Beck, Matthias A1 - Burkert, Andreas A1 - Harnisch, J. A1 - Isecke, Bernd A1 - Osterminski, K. A1 - Raupach, M. A1 - Schießl, P. A1 - Tian, W. A1 - Warkus, J. T1 - Deterioration model and input parameters for reinforcement corrosion N2 - The paper presents the damage model of German Research Unit 537 which was used as a working hypothesis for the development of a user-friendly design model. Excerpts from the laboratory experiments and numerical calculations processed in project A of the research unit are presented here. The excerpts include the quantification of self-corrosion, geometrical effects in the macrocell corrosion, development of corroding steel surface and pit depth as well as the quantification of the resistivity of the concrete and the corrosion of steel in cracked concrete. KW - Reinforcement corrosion KW - Macrocell corrosion model KW - Design for durability PY - 2012 U6 - https://doi.org/10.1002/suco.201200004 SN - 1464-4177 VL - 13 IS - 3 SP - 145 EP - 155 PB - Ernst & Sohn CY - Berlin AN - OPUS4-26581 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -