A proposal for determining the remaining time to chloride induced corrosion initiation of existing reinforced concrete structures
conference paper
Asset managers would benefit from knowing when to expect corrosion initiation in a particular reinforced concrete structure. However, accepted approaches to test existing structures for the remaining time to corrosion initiation are lacking. This paper proposes such an approach, based on experience in the field and additional considerations. From say 20 years age, existing structures embody the concrete's response to actual environmental loads, e.g. in chloride profiles. Based on measuring the actual cover depth, taking (at least six) chloride profiles, some assumed parameters and a simple model, the expected time to corrosion initiation for a particular test area can be predicted. Sampling frequencies are given. Uncertainties can be taken into account by applying a safety margin to the cover depth. Results of at least six tests are classified and suggestions for interpretation are given. Because the accuracy is limited, the results are classified in three broad ranges: 5 years or less, 5 to 15 years, or more than 15 years. The procedure is applied to a field case and results are discussed. © Springer International Publishing AG 2018.
Bam; Cement and Beton Centrum; et al.; Rijkswaterstaat - Ministry of Infrastructure and the Environment; Van Hattum en Blankevoort; VolkerInfra
Bam; Cement and Beton Centrum; et al.; Rijkswaterstaat - Ministry of Infrastructure and the Environment; Van Hattum en Blankevoort; VolkerInfra
TNO Identifier
777320
ISBN
9783319594705
Publisher
Springer International Publishing
Source title
2017 fib Symposium - High Tech Concrete: Where Technology and Engineering Meet. 12 June 2017 through 14 June 2017
Editor(s)
Lukovic, M.
Hordijk, D.A.
Hordijk, D.A.
Pages
2074-2082
Files
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