Packing of Particles (Part 3)

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Abstract
In classical packing theory, composite packing density of a bimodal mixture is increased by increasing the component fine or coarse packing density via particle size distribution broadening. In this study, the effects of particle size distribution shape of component fine and coarse particle distributions on composite packing density of bimodal mixtures were investigated. The results from the present study indicated that while composite packing density can be increased by increasing either the coarse or fines packing density, it is limited to mixtures in which the fines and coarse are significantly different in size. In practically sized mixtures with a fines to coarse size ratio Z of 1/10, the highest composite packing density is dependent not only on component fine and coarse packing density, but on the shape of the particle size distribution as well. From the present study, asymmetrically skewed distributions devoid of midsized particles give the highest packing density in practically size systems.

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