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Slurry transport experiments were performed with five double-species slurries composed of glass beads and water. The double-species glass beads were various combinations of beads having two widely different densities and three narrow particle size distributions. Pressure gradients for double-species slurries were compared to those for individual components at the same solids volume concentrations. Effect of mean particle diameter on pressure gradient of double-species slurry in the pipe was studied. Experiments were performed in a horizontal pipe flow loop of 23 mm internal diameter. Obtained data are useful for pipeline systems design and also valuable for verification of numerical simulations of the slurry flows.

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