Estimation of floc size in highly concentrated calcium carbonate suspension obtained by filtration with dispersant

Fourier-Transform Rheology of Unvulcanized, Carbon Black Filled Styrene Butadiene Rubber

“…In this equation η 0 and [η] are the zero shear viscosity of the matrix and the intrinsic viscosity of the dispersion, respectively. It was found experimentally that the scaling exponent [η]φ m is like in our results often close to 2, so Equation can be reduced to a one‐parameter equation (Equation ) to describe I 3/1 (γ 0 = 0.32) as a function of filler volume fractionFor the samples filled with the N339 CB, a maximum packing fraction φ m of 0.32 (= ^ 100 phr) was found, which is lower than the theoretical value for unimodal spherical particles in closest packing (φ m = 0.74). This is due to the complexer structure of CB aggregates compared to spherical particles and thus the CB cannot pack so closely as hard spheres.…”

Study of the mechanisms underlying the fresh-state response of cementitious materials modified with nanoclays

“…Flocculation leads to entrapped water within particles, resulting in a change in the solid volume fraction. To take this into consideration, Soua et al [17] proposed the following modified model, which is an extension of the Krieger-Dougherty equation for flocculated suspensions:…”

Shear modulus of colloidal suspensions: Comparing experiments with theory

“…Ideal structures like hexagonal close packing are unlikely to be the final packing structure for colloidal particles of a nonspherical, irregular shape. Several authors [11,[30][31][32] have arrived at a value between 0.5 and 0.55 as the maximum packing fraction in suspensions of colloidal particles and a value of 0.5 was chosen for φ m . It was also found that changing this value did not have a significant effect on the final results.…”