Service life estimation of concrete structures reinforced with Cr-bearing rebars under macrocell corrosion conditions induced by cracking in cover concrete
- Authors
- Tae, Sung-Ho; Kyung, Je-Woon; Ujiro, Takurni
- Issue Date
- Jun-2007
- Publisher
- Nippon Tekko Kyokai/Iron and Steel Institute of Japan
- Keywords
- Cr-bearing rebar; service life estimation; macrocell corrosion; crack
- Citation
- ISIJ International, v.47, no.6, pp.875 - 882
- Indexed
- SCIE
SCOPUS
- Journal Title
- ISIJ International
- Volume
- 47
- Number
- 6
- Start Page
- 875
- End Page
- 882
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/181943
- DOI
- 10.2355/isijinternational.47.875
- ISSN
- 0915-1559
- Abstract
- Cracked concrete members reinforced with Cr-bearing rebars were assumed for the purpose of developing Cr-bearing rebars having the required corrosion resistance in macrocell corrosion environments induced by cracking in cover concrete. The service life of concrete structures reinforced with Cr-bearing rebars was then estimated based on a macrocell corrosion rate model, and their Cr content to achieve a service life of 100 years was calculated. As a result, the service life of concrete reinforced with Cr-bearing rebars was found to increase as their Cr content increased regardless of the corrosive environment type, The calculation also revealed that Cr contents of 16% or more and 13% or more would lead to a service life of over 100 years in harsh and moderate chloride attack zones, respectively. In a carbonation zone, the Cr content to achieve a service life of over 100 years was calculated to be 9% or more.
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