LIMA, G. G. C.; LIMA, Geralda Gilvânia Cavalcante de.
Abstract:
Rhelogical properties of several suspensions of multgear-aluniina have been
studied in the present work, at the rate of 5, 10, 15, 20, 25, 30, 35 and 40 grams for each
100 ml of fluid, varying the speeds and times of homogenization at ambient
temperature.
The effect of the concentration, as well as the stirring speed and time over the
rheologicals proprieties, were investigated mainly through parameters, like viscosity
apparent, consistency index and power index.
All the analyzed suspensions showed newtonian behavior for concentrations less
than 10g/100ml, being such concentration named critic concentration. Concentrations
greater than this showed non-newtonian behavior.
The obtained results also show that at the studied conditions, above the critical
concentration, the suspensions acquire pseudoplastic behavoir, showing higler evidence
as the concentration increases.
Mathematical models showing a good agreement with the experimental data.