人工泥岩の膨張圧力特性 : 交換性陽イオンの影響

概要

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Through swelling and slaking properties, the soft rocks cause serious problems such as ground pressure and landslide particulaly in localities which lie on the Tertiary sedimentary rocks. In order to understand the swelling behaviors of such soft rocks, an experiment was carried out to measure the swelling pressure of montmorillonite-pressed disks containing quartz powder in various proportions. The disks, termed "artificial mudstone" herein for convenience, were made in accordance with the procedure shown in Fig. 1,using montmorillonite saturated with Na or Ca. The swelling pressure was read using an apparatus shown in Fig. 2,at various loading pressures. The results are summarized as follows : (1) The maximum pressure was found to depend on the clay contents, the pressure of Na type being slightly higher than that of Ca type. (2) The maximum pressure decreased with increasing initial loading pressure, and this trend was more remarkable for Na type.
日本粘土学会の論文
1987-09-05