| Budget Amount *help |
¥10,270,000 (Direct Cost: ¥7,900,000、Indirect Cost: ¥2,370,000)
Fiscal Year 2015: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Fiscal Year 2014: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2013: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
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| Outline of Final Research Achievements |
Firstly we investigated the changes of various properties of fire-damaged concrete after re-curing, including compressive strength, Young modulus, bond strength, freezing and thawing resistance, mass, and volume,etc., and clarified the effects of strength levels before heated, heating temperatures, cooling methods, re-curing methods, and re-curing duration on the property recovery degrees. Furthermore, we examined the hydrates (Ca(OH)2, CSH), pore volume and size, inside and surface cracks of fire-damaged concrete right after heated and after re-cured, to clear the mechanism of property recovery. Moreover, a new repairing material was developed for fire-damaged concrete, which is mainly made of wastes such as fly ash and molten slag of municipal waste incineration residue, following the developments of setting retarder and drying shrinkage reducers.
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