Research on the deterioration mechanism and maintenance of concrete structures deteriorated due to the macro-cell corrosion in concrete
| Project/Area Number |
20560438
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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 |
Civil engineering materials/Construction/Construction management
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| Research Institution | Public Works Research Institute |
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Principal Investigator |
WATANABE Hiroshi Public Works Research Institute, 材料資源研究グループ, 上席研究員 (90355785)
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| Co-Investigator(Kenkyū-buntansha) |
KOGA Hirohisa 独立行政法人土木研究所, 材料資源研究グループ, 主任研究員 (20355788)
NAKAMURA Eisuke 国土交通省国土技術政策総合研究所, 企画部国際研究推進室, 研究官 (80391605)
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| Project Period (FY) |
2008 – 2010
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| Project Status |
Completed (Fiscal Year 2010)
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| Budget Amount *help |
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2010: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2009: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2008: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
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| Keywords | コンクリート構造物 / 鋼材腐食 / マクロセル腐食 / 自然電位 / 維持管理 / 塩害 / 暴露試験 |
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| Research Abstract |
In this research, inspection and repairing methods for concrete structures deteriorated by macro-cell corrosion were investigated using concrete specimens exposed outdoor. The following results are obtained. Approximately 100 mV shift of half-cell potential should be considered to detect macro-cell corrosion in concrete. When the patch repair is applied, the macro-cell corrosion can be mitigated by using repairing materials that have high electrical resistance. On the other hand, the increase of corrosion rate under the macro-cell corrosion condition can not be evaluated quantitatively by the measured current between anode and cathode. For this problem, further research is needed.
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Report
(4 results)
Research Products
(3 results)
