2015 Fiscal Year Final Research Report
Effect of network formation on interface settling property of clay floc suspension
| Project/Area Number |
24580348
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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 |
Irrigation, drainage and rural engineering/Rural planning
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| Research Institution | Ibaraki University |
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Principal Investigator |
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| Research Collaborator |
OOI SETSUO (前)農林水産省農村工学研究所, 資源循環工学研究領域, 研究員
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| Project Period (FY) |
2012-04-01 – 2016-03-31
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| Keywords | フロック構造 / 粘土懸濁液 / 最疎充填 / 最密充填 / 完全充填 / 有効応力 |
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| Outline of Final Research Achievements |
The structure of floc dose not vary during settling process. This prediction by Michaels and Bolger was proved to be valid for only below the concentration of 0.74 volume fraction (maximum packing). This result means that the rigid sphere model can be applied for only below the volume fraction of 0.74. Therefore, the structure of floc seems to be strong in the settling process but the weak structures were found in the packing process. Those structures were network structure, minimum packing structure and maximum packing structure. These structures were rather stable for weak stress and were found to exist by the measurement of ultimate sediment volume.
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| Free Research Field |
土壌コロイド工学
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