Mechanical interaction between swelling compacted clay and fractured rock, and the leaching of clay colloids

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Mechanical interaction between swelling compacted clay and fractured rock, and the leaching of clay colloids

We consider the interaction between a saturated clay buffer layer and a fractured crystalline rock engineered disturbed zone. Once saturated, the clay extrudes into the available rock fractures, behaving as a compressible nonNewtonian fluid. We discuss the modelling implications of published experiments carried out in Sweden and more recently in Japan. Extrusion is halted either when the advanc...

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Nearly all muds, in drilling applications, contain smectite clay minerals, such as montmorillonite or hectorite, which have the remarkable property of swelling in the presence of water. Such systems are known to exhibit long-term gelation and thixotropic behavior, of great importance in applications, depending on clay volume fraction, particle properties (origin of the clay, surface charge, etc...

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ژورنال

عنوان ژورنال: Engineering Geology

سال: 1999

ISSN: 0013-7952

DOI: 10.1016/s0013-7952(99)00071-x