RHEOLOGY AND SCALING BEHAVIOR OF SWELLING CLAY DISPERSIONS

Chaoui, S.; Mehamha, A.; Belkham, N. H.; Benachour, D.

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.