| Budget Amount *help |
¥17,810,000 (Direct Cost: ¥13,700,000、Indirect Cost: ¥4,110,000)
Fiscal Year 2020: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2019: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2018: ¥9,490,000 (Direct Cost: ¥7,300,000、Indirect Cost: ¥2,190,000)
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| Outline of Final Research Achievements |
When concrete comes into contact with sulfuric acid and deteriorates, it is found that the degree of deterioration differs due to the difference in the composition of calcium silicate hydrate (specifically, due to the difference in CaO/SiO2 ratio of calcium silicate hydrate), which is a component of cement hydrates in concrete. It is also confirmed that the phenomenon of repeated expansion and spalling of concrete during its sulfuric acid deterioration can be reproduced by modeling the contribution of gypsum produced by the reaction between cement hydrates and sulfuric acid to filling-in of pores in concrete and expansion of concrete.
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