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A platform for research: civil engineering, architecture and urbanism
Service life estimation of concrete structures reinforced with Cr-bearing rebars under macrocell corrosion conditions induced by cracking in cover concrete
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 with a cover depth of not less than 20 mm was calculated to be 9% or more.
Service life estimation of concrete structures reinforced with Cr-bearing rebars under macrocell corrosion conditions induced by cracking in cover concrete
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 with a cover depth of not less than 20 mm was calculated to be 9% or more.
Service life estimation of concrete structures reinforced with Cr-bearing rebars under macrocell corrosion conditions induced by cracking in cover concrete
Ermittlung der Lebensdauer von Stahlbetonstrukturen mit Armierung mit chromlegiertem Betonstahl unter den Bedingungen einer durch Rissbildung in der Betonummantelung induzierten Makrozellenkorrosion
Tae, Sung-Ho (author) / Kyung, Je-Woon (author) / Ujiro, Takumi (author)
ISIJ International ; 47 ; 875-882
2007
8 Seiten, 7 Bilder, 3 Tabellen, 37 Quellen
Article (Journal)
English
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