2004 Fiscal Year Final Research Report Summary
A study on the relationship between the ITZ (Interfacial Transition Zone) and steel corrosion in RC structures.
| Project/Area Number |
15560399
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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 | Port and Airport Research Institute, Independent Administrative Institution |
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Principal Investigator |
HAMADA Hidenori Port and Airport Research Institute, Materials Division, Head, 地盤構造部・材料研究室, 室長 (70344314)
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| Co-Investigator(Kenkyū-buntansha) |
YAMAJI Toru Port and Airport Research Institute, LCM Research Center, Project Researcher, LCM研究センター, 特任研究官 (10371767)
MIYATA Yoshikazu Port and Airport Research Institute, Materials Division, Research Engineer, 研究官 (30392989)
AKIRA Yoshikazu Port and Airport Research Institute, Materials Division, Special Research Engineer, 特別研究員 (10416018)
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| Project Period (FY) |
2003 – 2004
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| Keywords | RC structure / Steel-concrete interface / Steel corrosion / Corrosion tendency / Corrosion rate / Chloride attack / Chloride threshold value / Interface improvement |
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| Research Abstract |
In this study, several series of experimental works were carried out.
From these series of experimental works, the following research results can be obtained.
(1)By fresh concrete breeding, voids are easily formulated at steel-concrete interface.
(2)Steel corrosion in concrete is greatly affected by the steel-concrete interface.
(3)As interface voids become larger, steel corrosion clearly becomes heavier.
(4)Steel corrosion in concrete initiate at the void of steel-concrete interface.
(5)As interface voids become larger, the chloride threshold value or corrosion initiation becomes smaller.
(6)By applying the cement paste on steel surface before concrete casting, voids at steel-concrete interface become very small.
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