| Project/Area Number |
17K06566
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Geotechnical engineering
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| Research Institution | Kyushu Sangyo University |
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Principal Investigator |
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| Project Period (FY) |
2017-04-01 – 2020-03-31
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| Project Status |
Completed (Fiscal Year 2019)
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| Budget Amount *help |
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2019: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2018: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2017: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
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| Keywords | 酸性土 / 中性化処理 / 有効利用 / pH / 酸性化可能性試験 / 乾湿繰返し養生 / 促進養生 / 酸性化剤 / アルカリ資材 / 長期特性 / 有機物 / ヒ素 / 中性化 / 長期 / 養生条件 / pHの測定法 / 建設発生土 / 自然由来重金属 / 発生土の有効活用 / 重金属類の不溶化 |
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| Outline of Final Research Achievements |
The neutralization treatment for the effective use of acidified soil as a geomaterial was studied. The following results were obtained. In case of calcium carbonate is added for neutralization, there are advantages such as low risk of becoming highly alkaline due to excessive addition and little change over the long term, but there is a concern that the amount added will increase. In case of magnesium oxide was added, neutralization could be achieved in the short term with a small amount, but there was a concern that the pH would become too high. In order to evaluate long-term pH in a short period, it is desirable to measure the pH by acidification test, using a sample that has been subjected to repeated dry and wet curing.
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| Academic Significance and Societal Importance of the Research Achievements |
首都圏の建設工事は工事規模が大きいうえ，大深度地盤の掘削によって，酸化し酸性化する土砂が大量に発生する。この土砂を利用可能な状態に改良し，発生現場に近い場所で有効に活用することで，天然土砂の採掘を抑制するとともに，残土の処分が提言されるため処分場容量の保全が可能であるうえ，土砂運搬に伴う環境負荷の低減に貢献することができる。
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