Study on maintenance for RC road bridge deck deteriorated by deicing salt
| Project/Area Number |
24360184
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Partial Multi-year Fund |
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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 | Nihon University |
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Principal Investigator |
IWAKI Ichiro 日本大学, 工学部, 教授 (20282113)
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| Co-Investigator(Kenkyū-buntansha) |
KODA Yasuhiro 日本大学, 工学部, 准教授 (40328696)
KAMIHARAKO Akihisa 弘前大学, 理工学研究科, 准教授 (70333713)
NAITO Hideki 東北大学, 工学研究科, 准教授 (50361142)
HANEHARA Syunsuke 岩手大学, 工学部, 教授 (10400178)
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| Project Period (FY) |
2012-04-01 – 2015-03-31
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| Project Status |
Completed (Fiscal Year 2014)
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| Budget Amount *help |
¥16,900,000 (Direct Cost: ¥13,000,000、Indirect Cost: ¥3,900,000)
Fiscal Year 2014: ¥5,590,000 (Direct Cost: ¥4,300,000、Indirect Cost: ¥1,290,000)
Fiscal Year 2013: ¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
Fiscal Year 2012: ¥5,980,000 (Direct Cost: ¥4,600,000、Indirect Cost: ¥1,380,000)
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| Keywords | 道路橋RC床版 / 疲労 / 凍結防止剤 / 塩害 / ASR / 輪荷重走行試験 / 強制振動試験 / 小型輪荷重走行試験 / 輪走行速度 / 光ファイバセンサ / 3Dレーダ / 残存疲労耐久性 / 走行速度 / 水の影響 / 耐凍害性 |
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| Outline of Final Research Achievements |
Recently, reinforced concrete road bridge decks are being damaged by fatigue due to vehicle loadings and chloride induced deterioration and/or ASR due to deicing salt. The aim of this study is to solve the mechanism for RC deck deteriorated by deicing salt and develop its maintenance technology.
Firstly, using full-sized RC deck specimens, accelerating tests for chloride induced deterioration and wheel load trucking test were conducted. These experimental results revealed that the fatigue resistance of RC bridge deck was clearly declined even if the corrosion rate of rebar was low, and the corrosion of upper rebars would be the dominant factor in the fatigue resistance of RC bridge deck.
Next, ASR accelerated tests and wheel load trucking test were conducted. It was revealed that the fatigue resistance of RC bridge deck by ASR depended on the reaction velocity of ASR. Furthermore, a vibration test proved useful in evaluating the fatigue resistance of RC bridge deck by ASR.
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Report
(4 results)
Research Products
(9 results)
