Abstract
Packing of monosized fine spheres in the presence of monosized coarse spheres is examined both experimentally and analytically. By modeling the extra pore volume generated from the interaction of fine and coarse particles as a linear function of the size of the fine particles and the surface area of the coarse particles, good agreements between model and experimental data from the present study and those from literature were found. Good agreement was also obtained when the model was applied and compared with trimodal packing data. From these agreements, it can be concluded that the development of coarse/coarse particle contacts does not dramatically change the amount of extra pore volume. As a consequence, extra pore volume in dense packing of mixtures of narrowly distributed particles can be treated as dependent on the surface area of the desrupting media and the size of the particle.
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