| Budget Amount *help |
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2017: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2016: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2015: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
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| Outline of Final Research Achievements |
This study aimed to clarify the leaching and penetration properties of nitrite ions in nitrite-type repair materials exposed to rainfall. Repaired concrete specimens were prepared for leaching and penetration tests using a lithium nitrite solution, and the amounts of leaching and penetration of nitrite ions were measured under simulated rainfall and real site.
As a result, it was confirmed that the nitrite ion concentration in all repair methods changed at approximately cycle 10. And the nitrite ion leaching can be controlled using cement paste and cement mortar surface coatings with the addition of nitrite solution and surface coating by mortar after direct coating with the nitrite solution. Furthermore, the nitrite ion leaching amounts of all repair methods in all cycles were smaller than that of the discharge standard value (329ppm).
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