Rheological behaviour of pure clay and coarse-grained clay suspensions using an inclined blade vane-in-cup

Mixtures of clay and sand suspended in water are complex systems encountered many industrial environmental applications, but their understanding modelling still limited require further investigations. In this way, the rheological behaviour pure non-thixotropic coarse-grained suspensions is investigated with a rotational rheometer equipped by an inclined blade vane-in-cup, where type volume fraction both fine coarse materials varied. The Herschel–Bulkley model τ=τy+Kγ̇n used to describe successfully flow curves relating shear stress τ rate γ̇, from which yield τy, consistency K index n deduced. main contributions study (i) validate vane-in-cup for estimation polymer microgels, suspensions, (ii) conclude on most appropriate predict over wide range fractions, (iii) highlight how frictional contacts grains may play role bulk suspensions. We believe that work would be useful improving description cohesive geophysical applications.