The reliabiltiy of corrosion detection with regard to chosen grid size

Author(s): Sylvia Keßler
Paper category: Proceedings
Book title: Proceedings of the International Conference on Sustainable Materials Systems and Structures (SMSS2019) Durability, Monitoring and Repair of Structures
Editor(s): Ana Baričević, Marija Jelčić Rukavina, Domagoj Damjanović, Maurizio Guadagnini
ISBN: 978-2-35158-217-6
e-ISBN: 978-2-35158-218-3
Publisher: RILEM Publications SARL
Publication year: 2019
Pages: 271-277
Total Pages: 813
Language: English

Abstract: The global dimension of corrosion-related durability challenges for infrastructure requires more effort in research for reliable corrosion inspection and condition assessment. For maintaining infrastructure durability especially in the field of reinforced concrete structures this information about the current condition is essential for scheduling future inspection or if necessary repair measures. Main reason of corrosion initiation in infrastructures is the pplication of de-icing salt during wintertime or chlorides from marine environment. If initiated, corrosion can lead to structural damage like cracking and spalling of the concrete cover. The half-cell potential measurement method is the only available non-destructive measurement method to detect on-going corrosion. The information gained during half-cell potential measurement can be translated into structural reliability using common probabilistic models for predicting the service life of existing structures. In the case of chloride induced
corrosion these models predict probabilistically the time to corrosion initiation respectively the corrosion probability at the time of inspection. Major impact on the accuracy of the updated service life besides the probabilistic model itself has the reliability and the evaluation of the half-cell potential measurement. However, one of the main influencing factors on the reliability of the half-cell potential method has the chosen grid size. Therefore, this paper presents a case study for updating the service life with the focus on how the chosen grid size influences the reliability of corrosion detection.

Online publication :2019
Publication type : full_text
Public price (Euros) : 00