RHEOLOGY AND SCALING BEHAVIOR OF SWELLING CLAY DISPERSIONS
S. Chaoui, A. Mehamha, N. H. Belkham and 1 more
Journal of Fundamental and Applied Sciences · 2015
doi:10.4314/jfas.v4i2.10 (opens in a new tab)
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Abstract
<p>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 (f/f<sub>g</sub>-1)<sup>n</sup>, where f<sub>g </sub>captures the strength of particle interaction and n the microstructure. The scaling variable (f<sub>p</sub>/f<sub>pc</sub>-1), suggested in percolation theory to describe rheological behavior near percolation transition, acts to collapse G’ data suggesting that along lines of constant (f/f<sub>g</sub>-1) these gels are rheologically identical.</p>
Abstract licence: CC BY-NC
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