Print Email Facebook Twitter Real-time chloride diffusion coefficient in concrete using embedded resistivity sensors Title Real-time chloride diffusion coefficient in concrete using embedded resistivity sensors Author Kamat, Ameya (Concrefy B.V.) Abbas, Yawar (Concrefy B.V.) Blagojevic, Andrija (Concrefy B.V.) van Casteren, Toine (Concrefy B.V.) Walraven, J.C. (TU Delft Concrete Structures) Contributor Ye, Guang (editor) Dong, Hua (editor) Liu, Jiaping (editor) Schlangen, Erik (editor) Miao, Changwen (editor) Date 2021 Abstract Service life of concrete infrastructure is severely compromised because of chloride-induced corrosion and measuring the chloride content is crucial to determine the remaining service life. DuraCrete provides a chloride ingress model based on Fick’s 2nd law. Although the diffusion coefficient is modelled as a time-dependent variable, the DuraCrete solution averages it to a constant value. This simplification leads to inaccurate estimation of the chloride content. A new analytical solution that addresses the underlying mathematical discrepancy has been proposed. However, the time-dependent diffusion coefficient is still based on an empirical factor. In this study, a real-time durability monitoring system has been developed using remotely operated resistivity sensors. Such a system is able to monitor the time dependent diffusion coefficient without the need to incorporate empirical factors. Additionally, a numerical technique to find an approximation of the proposed improved analytical solution is presented using real-time resistivity measurements from laboratory and real structures. The results show that the discrete sensor data measurements over time provide a good approximation of the proposed analytical solution. The system developed in this study is used as a data-driven input parameter to supplement the existing chloride models. Subject Real-time resistivity sensorstime-dependent chloride diffusion coefficientDuraCreteservice life monitoringconcrete durability To reference this document use: http://resolver.tudelft.nl/uuid:106822f0-47ee-4d44-87a6-baa398896547 Publisher Delft University of Technology ISBN 978-94-6366-422-6 Source 4th International Rilem Conference on Microstructure Related Durability of Cementitious Composites: Microdurability 2020 Event 4th International Rilem Conference on Microstructure Related Durability of Cementitious Composites, 2021-04-29 → 2021-05-27, Online, Delft, Netherlands Part of collection Institutional Repository Document type conference paper Rights © 2021 Ameya Kamat, Yawar Abbas, Andrija Blagojevic, Toine van Casteren, J.C. Walraven Files PDF Real_time_chloride_diffus ... ensors.pdf 1.52 MB Close viewer /islandora/object/uuid:106822f0-47ee-4d44-87a6-baa398896547/datastream/OBJ/view