期刊
CLAYS AND CLAY MINERALS
卷 53, 期 3, 页码 211-223出版社
CLAY MINERALS SOC
DOI: 10.1346/CCMN.2005.0530302
关键词
clay; double layer; electrical forces; liquid limit; particle-particle interactions; sedimentation; viscosity
The behavior of fine-grained mineral systems is dependent on pore-fluid characteristics. The systematic analysis of previously published studies supports the development of a fabric map in the pH and ionic concentration space as a working hypothesis. This conceptual study is complemented with an extensive battery of tests where surface charge and particle interactions are controlled through pore-fluid characteristics. The macro-scale tests include sedimentation, viscosity and liquid limit, and involve a wide range of solid volume fractions (suspension to sediment) and strain levels. Experimental results permit the development of an updated fabric map on the pH-ionic concentration space which takes into consideration all experimental results. The fabric map is structured around a critical pH level and a threshold ionic concentration beyond which van der Waals attraction prevails.
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