Abstract
Crushed fragments of window glass were treated by two typical machines, a ball mill and a disc crusher, and they were size-sorted and analyzed in terms of shapeand size-classifications with a sieving apparatus and an image analyzer, iteratively.
The size reduction by the disc-crusher revealed that both characteristics of particle elongation and shape irregularity, increased once to the certain maximum values and then reduced to the smaller fragments, stepwisely. On the contrary, the mill produced the smaller fragments, keeping same elongation and similar irregularity, little by little from the large lumps.
However the smaller particles such as 150-270 mesh resembled each other in shape characteristics, such as elongation, asymmetricity or irregularity which might be caused the property of the crushing materials.
