| Project/Area Number |
25289146
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Partial Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Geotechnical engineering
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| Research Institution | Hiroshima University |
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Principal Investigator |
Tsuchida Takashi 広島大学, 工学(系)研究科(研究院), 教授 (10344318)
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| Co-Investigator(Kenkyū-buntansha) |
NAKARAI KENICHIRO 広島大学, 大学院工学研究院, 准教授 (10359656)
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| Research Collaborator |
Tang Y. X. 関門港湾建設(株), 技術課長
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| Project Period (FY) |
2013-04-01 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2015)
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| Budget Amount *help |
¥9,100,000 (Direct Cost: ¥7,000,000、Indirect Cost: ¥2,100,000)
Fiscal Year 2015: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Fiscal Year 2014: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2013: ¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000)
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| Keywords | セメント固化処理土 / 浚渫土 / 海成粘土 / 一軸圧縮強度 / 含水比 / セメント添加率 / 港湾 / 養生時間 / 強度予測式 / ゲル空隙比説 / 水セメント比 / 液性限界 / ベンダーエレメント試験 / 体積比 |
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| Outline of Final Research Achievements |
A formula to estimate unconfined compressive strength of cement-treated marine clays is proposed. In the proposed formula, the strength of cement-treated soil is given by volumetric solid content, strength increase coefficient due to cement, and exponential parameter N representing the effect of the void structure of soil and cement content on the solid material of soil. On comparing the estimates with those using a conventional formula based on water cement ratio, the proposed formula generated better-fit estimates. On the basis of the results obtained from the laboratory tests, it was found that the strength mobilization process can be divided into two stages; first stage within 3 days after curing (the early stage of curing) and the second stage 3 days after the curing. Two equations to evaluate strength during early stages of curing were proposed based on the normalized initial water content and normalized specific volume ratio.
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