Abstract
The paper presents experimental studies on influence of two arbitrary chosen additives on wall shear stress in hydromixture, which consists solid particles of averaged diameter 0.05 mm. Experiments were performed for two mass concentration of solids equal to 20% and 43%. Measurements were performed for varied doses of deflocculants in three different proportions in wide range of shear rates. Experiments confirmed influence of chosen additives on decreasing hydromixture viscosity and as a consequence decreasing of shear stresses. The analysed process is complex and strongly depends on doses of deflocculants and solids concentration. However, the rheological property of such mineral suspension is complex and there is no single parameter that can solely explain it. Physical and chemical properties affect on the level of interparticle interaction or aggregation and therefore it is useful to control them in industrial process such as transportation of slurries.
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