2011 Fiscal Year Final Research Report
Deterioration phenomenon of lime and cement treated soils under seawater and its evaluation
| Project/Area Number |
21360228
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Geotechnical engineering
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| Research Institution | Saga University |
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Principal Investigator |
HAYASHI Shigenori 佐賀大学, 低平地沿岸海域研究センター, 客員研究員 (80112308)
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| Co-Investigator(Kenkyū-buntansha) |
SUETSUGU Daisuke 佐賀大学, 低平地沿岸海域研究センター, 准教授 (30423619)
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| Project Period (FY) |
2009 – 2011
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| Keywords | 土質安定処理 / 石灰 / セメント / 劣化 / 間隙径分布 / 予測 |
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| Research Abstract |
In this study, in order to investigate the deterioration phenomenon of lime and cement treated soil, laboratory tests which used the treated soil immersed in seawater were performed. It was found that the total pore volume scarcely changed and the pore size at the maximum volume in the pore size distribution becomes large gradually with progress of deterioration. Furthermore, the pore size distribution of lime-treated soil deteriorated by seawater is much similar to that of Ariake clay before adding the lime. Deterioration progress is influenced by stabilizer content and Mg concentration of seawater. Deterioration speed of treated soil can be predicted in the same way as predicting the concrete neutralization, and it can be expressed by a simple approximation formula.
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