The paper presents the effect of powders obtained from egg-shells and limestone on rheological properties cement pastes. Both were added to Portland CEM I 42.5 R, 30% by mass. higher yield stress plastic viscosity pastes prepared with addition eggshell powder, compared made explained influence membrane its chemical structure. membrane, which absorbs water expands in paste, is causing an increas...

A transparent clay manufactured using Carbopol® UltrezTM 10 (simplified as U10) was introduced, and its manufacturing processes were briefly described. Both relative transparency (RT) modulation transfer function (MTF) methods used to quantify the optical character variation via soil thickness. The of this new analyzed compared with four traditional materials. thixotropic properties synthetic m...

−− the aim of this work is the study of the problems that arise during roll coating application of paints on steel sheets. We put in evidence the particular effects due to the non-Newtonian properties of these fluids. At speeds above a certain critical value, the flow of paint through the applicator suffers a hydrodynamical instability called ribbing, which generates a patterned interface on th...

Coagulation of cement particles is an inevitable phenomenon of fresh cement-based materials undergoing solidification. Coagulation can be classified into two types, reversible flocculation and irreversible coagulation, wherein microstructural change affects the rheological properties, including shear thinning and thixotropy, and the hydration process. This paper attempts to measure the mechanic...