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Numerical Simulations for the Detection of Leakages in Bridge Deck Membranes Through Resistivity Measurements

  • Carla DriessenEmail author
  • Michael Raupach
Conference paper
  • 133 Downloads
Part of the RILEM Bookseries book series (RILEM, volume 17)

Abstract

Through measurement of the electrolytic resistance between two carbon meshes embedded in a textile reinforced concrete interlayer on bridges, a large scale monitoring of humidity is implemented. The electrolyte resistance is measured using alternating current. Decreasing values in the measured electrolyte resistance indicate water ingress through leakages in a surface-applied membrane. The monitoring will have a positive effect on the durability of a bridge construction since defects in the membrane can be detected in an early stage which allows cost-effective and timely measures to be taken to prevent corrosion initiation of the reinforcing steel. Through numerical simulations the theoretical size of a detectable leakage area is calculated which depends on the geometry of the leakages, the electrolyte resistance of the mortar in wet and dry condition, the position of the leakage, and other boundary conditions.

Keywords

Bridge Deck Mesh Carbon Electrolytic Resistance Leakage Zone Leakage Depth 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgements

The authors would like to thank the BMBF for sponsoring the project and the project executing organization, “VDI Technologiezentrum GmbH (VDI TZ)” for the support.

The project partners are: Bundesanstalt für Straßenwesen (BASt), Eurovia Beton GmbH NL Bauwerksinstandsetzung (Projektkoordinator), FTA Forschungsgesellschaft für Textiltechnik Albstadt mbH, Massenberg GmbH, instakorr GmbH (Darmstadt) and Sto Cretec GmbH, Tochtergesellschaft der Sto SE & Co. KGaA.

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Copyright information

© RILEM 2019

Authors and Affiliations

  1. 1.Institute of Building Materials ResearchRWTH Aachen UniversityAachenGermany

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