The rheological parameters of a clay suspension can be used to evaluate particle-particle interactions. Although there have been many studies of the rheological behavior of suspensions of reference clays, only few studies were performed with suspensions of mixed clays, and the rheological properties of these suspensions are not yet fully understood. The length-to-width ratio of some soil clays was evaluated by Egashira and Matsumoto (1981) based on viscosity measurements of very dilute suspensions of these clays. The influence of montmorillonite additions on the rheological behavior of kaolinite suspensions was determined by Keren (1989, 1991). The particle arrangement in...

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