Revue des Sciences Fondamentales Appliquées
Volume 4, Numéro 2, Pages 202-209
2012-07-01
Rheology And Scaling Behavior Of Swelling Clay Dispersions
Authors : Chaoui S. . Mehamha A. . Belkham N. H. . Benachour D. .
Abstract
The microstructure and scaling of rheological properties of colloidal gels of bentonite investigated as a function of volume fraction and strength of interparticle interaction over a range of volume fractions, elastic modulus is well described with a scaling law functions of volume fractions, while the role of interparticle attractions can be accounted for by expressing these rheological properties as (/g-1)n, where g captures the strength of particle interaction and n the microstructure. The scaling variable (p/pc-1), suggested in percolation theory to describe rheological behavior near percolation transition, acts to collapse G’ data suggesting that along lines of constant (/g-1) these gels are rheologically identical.
Keywords
rheology, scaling behavior, clay.
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