Investigation on complex deterioration of chloride attack and ASR followed by a repair method using lithium salt
| Project/Area Number |
23360197
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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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 | The University of Tokushima |
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Principal Investigator |
UEDA Takao 徳島大学, ソシオテクノサイエンス研究部, 教授 (20284309)
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| Co-Investigator(Kenkyū-buntansha) |
HASHIMOTO Chikanori 徳島大学, 大学院・ソシオテクノサイエンス研究部, 教授 (10180829)
WATANABE Takeshi 徳島大学, 大学院・ソシオテクノサイエンス研究部, 准教授 (50332812)
TSUKAGOSHI Masayuki 徳島大学, 大学院・ソシオテクノサイエンス研究部, 助教 (50579711)
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| Project Period (FY) |
2011-04-01 – 2014-03-31
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| Project Status |
Completed (Fiscal Year 2013)
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| Budget Amount *help |
¥17,290,000 (Direct Cost: ¥13,300,000、Indirect Cost: ¥3,990,000)
Fiscal Year 2013: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Fiscal Year 2012: ¥6,890,000 (Direct Cost: ¥5,300,000、Indirect Cost: ¥1,590,000)
Fiscal Year 2011: ¥7,800,000 (Direct Cost: ¥6,000,000、Indirect Cost: ¥1,800,000)
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| Keywords | 塩害 / ASR / 複合劣化 / リチウム塩 / 電気化学的手法 |
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| Research Abstract |
The complex deterioration mechanism of chloride attack and ASR was intensively affected by the environmental temperature, and in the case of the alkali supply from outside of concrete, the penetration of Cl- was suppressed by the progress of ASR around the surface layer of concrete.
Moreover, as a repair method against such a complex deterioration mechanism, an electrochemical technique using an electrolyte solution containing the lithium nitrate among various kinds of lithium salt. Especially, when the environmental temperature was 40 degrees Celsius, the penetration of Li+ was promoted remarkably and the expansion of concrete after the treatment was suppressed.
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Report
(4 results)
Research Products
(17 results)
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[Journal Article]2013
Author(s)
上田隆雄, 濱田祐太郎, 郡 政人, 七澤章, 塚越雅幸
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Journal Title
コンクリート構造物の補修・補強・アップグレード論文報告集
Volume: Vol.13
Pages: 433-438
Related Report
Peer Reviewed
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