| Project/Area Number |
24658205
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Single-year Grants |
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| Research Field |
Irrigation, drainage and rural engineering/Rural planning
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| Research Institution | University of Miyazaki |
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Principal Investigator |
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| Project Period (FY) |
2012-04-01 – 2014-03-31
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| Project Status |
Completed (Fiscal Year 2013)
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| Budget Amount *help |
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2013: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2012: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
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| Keywords | 火山灰 / 環境修復ブロック / 保水性インターロッキングブロック / 曲げ強度 / 保水量 / 火山灰混入率 / 環境修復 / ブロック / 土木材料 / 農業工学 |
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| Research Abstract |
The volcanic ash, from Shinmoedake erupted in the last of January, 2011, kept high absorption as concrete aggregate. The experiment was done to clear the upper limit volume rate of mixing with the ash into the retentive interlocking concrete block for an environmental improvement, comparing with Sakurajima's volcanic ash. The rate indicating the bending strength of above 3.0 MPa was 30% for Shibnmoedake's ash and 20% for Sakurajima's ash respectively, and increasing Sakurajima's ash led to make the bending strength small and the retentive rate large because of its fine ash. Furthermore, using ash of 3:7, 5:5, and 7:3 of blending volume rate with the former ash vs the latter one in the ash-mixing volume rate of 20, 30, and 40% was tested. The 5:5 blending volume rate in 30% ash-mixing volume rate was recommended to keep enough bending stress and required block functions for retentive interlocking concrete block.
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