ABSTRACT
The basic concept of the Theory of Particle Mixtures, shown in Figure 2.1, is that, when two particulate materials of different sizes are mixed together, the smaller particles will attempt to fill the voids between the larger particles, but the structure of both coarse and fine materials will be disrupted by particle interference creating additional voids. The modelling process and associated Theory of Particle Mixtures require relevant properties to be defined and appropriate test methods to be selected in order to quantify the effects.
