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Clays and Clay Minerals

, Volume 53, Issue 3, pp 211–223 | Cite as

Fabric Map for Kaolinite: Effects of Ph and Ionic Concentration on Behavior

  • Angelica M. Palomino
  • J. Carlos SantamarinaEmail author
Article

Abstract

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.

Key Words

Clay Double Layer Electrical Forces Liquid Limit Particle-particle Interactions Sedimentation Viscosity 

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Copyright information

© The Clay Minerals Society 2005

Authors and Affiliations

  1. 1.School of Civil and Environmental EngineeringGeorgia Institute of TechnologyAtlantaUSA

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