What is meant by a mechanically fractured surface, and why would anyone want it?
Mechanical fracturing is one means of producing special effects to achieve architectural concrete surfaces. The tool used may be a bushhammer, jackhammer, hand hammer, chisel or other implement that will break away the surface or a part of it. Usually only a portion of the surface, such as projecting ribs, is fractured so that a pattern made up alternately of rough and smooth surfaces is achieved.