| Budget Amount *help |
¥2,400,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥300,000)
Fiscal Year 2011: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2010: ¥300,000 (Direct Cost: ¥300,000)
Fiscal Year 2009: ¥800,000 (Direct Cost: ¥800,000)
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| Research Abstract |
We examined the relationship the contact time and gravel diameters by using an impact experiment between natural gravel, and a hard plastic board. The experimental results showed that the gravel diameter was relative to the contact time. In addition, the count of the number of pieces of gravel was accurate. We estimated the gravel size distribution of natural gavel by the contact time was measured and converted to the gravel diameter. The resulting gravel size distribution of the gravel showed in the experiments matched the sieve test. Application of this method in the field is possible.
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