Variation in Service Life on RC Structure According to Concrete Binder Type
When an additive is used to replace a certain amount of cement, a concrete pore structure becomes dense. Thus, it results in inhibiting the penetration of chlorine ions and suppressing corrosion of reinforcing bars. However, the pH level of the concrete decreases, and it deteriorates the performance...
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doaj-816d89dea5ff47f39675601159c583992020-11-29T00:04:49ZengMDPI AGMaterials1996-19442020-11-01135430543010.3390/ma13235430Variation in Service Life on RC Structure According to Concrete Binder TypeJangHyun Park0JinHo Park1MyeongGyu Jung2Korea Institute of Future Convergence Technology, Hankyong National University, 327 Jungang-ro, Anseong 17579, KoreaKorea Institute of Future Convergence Technology, Hankyong National University, 327 Jungang-ro, Anseong 17579, KoreaKorea Institute of Future Convergence Technology, Hankyong National University, 327 Jungang-ro, Anseong 17579, KoreaWhen an additive is used to replace a certain amount of cement, a concrete pore structure becomes dense. Thus, it results in inhibiting the penetration of chlorine ions and suppressing corrosion of reinforcing bars. However, the pH level of the concrete decreases, and it deteriorates the performance of the passive film formed on the surface of the rebars embedded in the concrete. Therefore, in this study, the service lives of reinforced concrete containing different types of concrete binders were predicted and compared. The chloride ion diffusion coefficients of concretes with various binders were measured, and the critical chloride content of the rebar was assessed by the real-time monitoring on the corrosion initiation time of the rebar embedded in concrete. Moreover, Fick’s 2nd law was applied to predict when the chloride content at the 40 mm depth of cover reached the critical chloride content based on the chloride ion diffusion coefficient. It was observed that the service life of S6 (OPC 40% + GGBFS 60%) was the highest, followed by TBC (OPC 40% + GGBFS 40% + FA 20%), S3 (OPC 70% + GGBFS 30%), and OPC (OPC 100%).https://www.mdpi.com/1996-1944/13/23/5430reinforced concreteadditivecorrosionchloride ion diffusion coefficientcritical chloride contentservice life |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
JangHyun Park JinHo Park MyeongGyu Jung |
spellingShingle |
JangHyun Park JinHo Park MyeongGyu Jung Variation in Service Life on RC Structure According to Concrete Binder Type Materials reinforced concrete additive corrosion chloride ion diffusion coefficient critical chloride content service life |
author_facet |
JangHyun Park JinHo Park MyeongGyu Jung |
author_sort |
JangHyun Park |
title |
Variation in Service Life on RC Structure According to Concrete Binder Type |
title_short |
Variation in Service Life on RC Structure According to Concrete Binder Type |
title_full |
Variation in Service Life on RC Structure According to Concrete Binder Type |
title_fullStr |
Variation in Service Life on RC Structure According to Concrete Binder Type |
title_full_unstemmed |
Variation in Service Life on RC Structure According to Concrete Binder Type |
title_sort |
variation in service life on rc structure according to concrete binder type |
publisher |
MDPI AG |
series |
Materials |
issn |
1996-1944 |
publishDate |
2020-11-01 |
description |
When an additive is used to replace a certain amount of cement, a concrete pore structure becomes dense. Thus, it results in inhibiting the penetration of chlorine ions and suppressing corrosion of reinforcing bars. However, the pH level of the concrete decreases, and it deteriorates the performance of the passive film formed on the surface of the rebars embedded in the concrete. Therefore, in this study, the service lives of reinforced concrete containing different types of concrete binders were predicted and compared. The chloride ion diffusion coefficients of concretes with various binders were measured, and the critical chloride content of the rebar was assessed by the real-time monitoring on the corrosion initiation time of the rebar embedded in concrete. Moreover, Fick’s 2nd law was applied to predict when the chloride content at the 40 mm depth of cover reached the critical chloride content based on the chloride ion diffusion coefficient. It was observed that the service life of S6 (OPC 40% + GGBFS 60%) was the highest, followed by TBC (OPC 40% + GGBFS 40% + FA 20%), S3 (OPC 70% + GGBFS 30%), and OPC (OPC 100%). |
topic |
reinforced concrete additive corrosion chloride ion diffusion coefficient critical chloride content service life |
url |
https://www.mdpi.com/1996-1944/13/23/5430 |
work_keys_str_mv |
AT janghyunpark variationinservicelifeonrcstructureaccordingtoconcretebindertype AT jinhopark variationinservicelifeonrcstructureaccordingtoconcretebindertype AT myeonggyujung variationinservicelifeonrcstructureaccordingtoconcretebindertype |
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1724412813354467328 |