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Effect of shrinkage behavior by drying on mechanical properties of naturally alluvial clays.

干燥收缩行为对天然冲积粘土力学性能的影响。

基本信息

批准号：
11460108
负责人：
FUJII Katsumi
金额：
$ 9.15万
依托单位：
Iwate University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
1999
资助国家：
日本
起止时间：
1999 至 2001
项目状态：
已结题

项目摘要

Head investigator, Prof. Katsumi Fujii (Iwate Univ.) adopted montmorillonite as a standard sample for this experiment, which is significant swelling clay mineral and typically deposited in Hachiroh-gata. Viscosities of montmorillonite were measured in the state of suspensions and paste, especially flow curves were detected under the several concentrations of pore solution. From these results, yield stresses were derived and examined. In addition to a swelling clay, viscosities of non-swelling and stable clay, kaolinite, were also measured. Investigator, Prof. Kiyoshi Koga (Iwate Univ.) supported the automatic measurement of viscosity.Investigator, Dr. Yasuhisa Adachi (Tsukuba Univ.) observed the flocculated settling of clay particles with microscope-video camera system. Then settling velocities were detected from image data processing and related to the solution concentrations. Another investigator, Dr. Nobuo Toride took samples of the alluvial clays of Ariake Bay, then measured hydraulic conductivities under the saline environment. These experimental data were examined with the factors of solid ratios and pore solution's concentrations.In academic year 2001, we synthesized the results mentioned above, then considered effect of shrinkage by drying on mechanical properties of clay from the viewpoint of changes in clay particles structures. This report is the abstract of them, complete one is attached to this document.

首席研究员，Katsumi Fujii教授（岩手大学）采用蒙脱石作为本实验的标准样品，蒙脱石是显著膨胀的粘土矿物，典型地沉积在八郎县。测定了蒙脱石在悬浮液和膏体状态下的粘度，特别是在不同浓度的孔隙溶液下的流动曲线。从这些结果，屈服应力推导和检查。除了膨胀粘土，非膨胀和稳定的粘土，高岭石的粘度也进行了测量。研究者，Kiyoshi古贺教授（岩手大学）研究者安久阿达奇博士（筑波大学）用显微摄像系统观察了粘土颗粒的絮凝沉降过程。然后通过图像数据处理检测沉降速度，并将其与溶液浓度相关联。另一位研究人员，Nobuo托里德博士采取了有明湾的冲积粘土样本，然后测量了盐水环境下的水力传导率。在2001学年，我们综合了上述结果，并从粘土颗粒结构变化的角度考虑了干燥收缩对粘土力学性质的影响。本报告是其中的摘要，完整的报告附在本文件之后。