Developing a 'simple' impact testing mechanism for concrete may not be that simple. A value of toughness of concrete is sometimes evaluated by determining the impact resistance of the concrete using a device that directs steel balls or BB's in the surface of the concrete. This is an imprecise methodoloy however for it sometimes merely indicates the toughness of the surface of the concrete and does not allow the mass of the concrete's toughness to be measured. We often use fibers to enhance toughness, particularly steel fibers. I wonder if your local representative from Fibermesh or some similar company selling fibers might not tell you how they deal with this determination in their research laboratories?
