2011 Fiscal Year Final Research Report
Development on estimation on deterioration of concrete structure attacked chloride ion
| Project/Area Number |
21560504
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Structural engineering/Earthquake engineering/Maintenance management engineering
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| Research Institution | Kagawa University |
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Principal Investigator |
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| Project Period (FY) |
2009 – 2011
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| Keywords | 塩害劣化 / 鉄筋腐食 / 劣化予測 / ひび割れモード |
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| Research Abstract |
In this paper, the prediction model for chloride induced damage is developed. The developed system consists of three segments, incubation period, progressive period and developed period. Incubation period is modeled using Fick' s diffusion equation. Corrosion speed of reinforcement is modeled using three parameters, diffusion coefficient, temperature, chloride ion density close to reinforcement.
The cracking model is considered by three mode, cracking along reinforcement, peeling off and horizontal cracking along reinforcement. This system is verified using existing concrete structure which has passed 35 years received chloride induced damage. This system coincides with the estimate data and the data in situ on corrosion rate, chloride ion density close to reinforcement and cracking mode.
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