Investigation on the effect of various factors on the rate of corrosion of reinforcing bar in concrete and estimation of the life of RC buildings
Project/Area Number |
21560579
|
Research Category |
Grant-in-Aid for Scientific Research (C)
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Allocation Type | Single-year Grants |
Section | 一般 |
Research Field |
Building structures/materials
|
Research Institution | Utsunomiya University |
Principal Investigator |
|
Project Period (FY) |
2009 – 2011
|
Project Status |
Completed (Fiscal Year 2011)
|
Budget Amount *help |
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2011: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2010: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2009: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
|
Keywords | 腐食速度 / 質量減少 / 塩分量 / 水セメント比 / かぶり厚さ / 鉄筋コンクリート / 鉄筋腐食 / 含水率 / 塩化物量 |
Research Abstract |
The long term outdoor exposure test on the rate of corrosion of reinforcing bar in concrete which contains chloride ion. The factor of experiment are sodium chloride content(0~1.0%/sand), water-cement ratio(50~65%), and thickness of concrete cover(15~40mm). It is conclude as follows. The corrosion loss of reinforcing bar in long term outdoor exposure test increases in proportion to square root of exposure period. Rate of corrosion of reinforcing bar decrease with increasing thickness of concrete cover in sodium chloride content(0~0.3%/sand). The estimation equation of the rate of corrosion of sodium chloride content are proposed by thickness of concrete cover and water cement ratio.
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Report
(4 results)
Research Products
(2 results)