スメクタイトを含む軟岩の諸性質 (2) : 組織および膨張圧特性

概要

論文の詳細を見る
Soft rocks, especially smectite bearing tuffs and mud stones, sometimes create serious hazards such as ground pressure, landslide and crumbling of cut slope. In the previous report, it was elucidated that the deterioration of soft rocks during water absorbing process was affected by the content of smectite and exchangeable cation composition. Several tests such as scanning electron microscopy, measuring of pore distribution, swelling pressure tests and unconfined compression tests were carried out to clarify physical and mechanical properties of soft rocks. The properties such as surface morphology and texture and swelling pressure were likewise determined. The results of such tests are summarized as follows : (1) The morphology and swelling behaviors of smectites in soft rocks are closely related to the content and exchangeable cation composition of smectite. (2) The texture (pore distribution) of soft rocks is related not only to the age of sedimentation but also with the types of alteration of rocks and the content of smectite. (3) The deterioration of soft rocks depends upon its mechanical strength. The lower the strength is, the more easily soft rocks deteriorate.
日本粘土学会の論文
1994-07-07