2.5.4 Determination of thixotropy
A two-step steady state flow procedure was used to increase the shear
rate from 0 s-1 to 150 s-1. And
immediately afterward decrease it from 150 s-1 to 0
s-1 at the same rate of change. The variation of shear
stress and viscosity with the shear rate were recorded throughout the
process. The obtained data were simulated curvilinearly using the cross
model.