Almost without exception the complex tools, machines and vehicles of our modern industrial production system rest upon, move on and are sheltered by concrete. It follows then that an intimate, detailed working knowledge of concrete is an essential part of the arsenal of information which management must have at its disposal in order to forestall damage to costly equipment and to maintain production at peak levels. For many reasons that intimate, detailed working knowledge is not always at hand, partly because of a misconception shared by far too many people that concrete is a pretty simple material.
The fact is that there can be literally thousands of concretes, and it is well within the range of modern technology to produce concretes within very narrow tolerances to satisfy any imaginable private, public or industrial need. Every known property of the material can be fine tuned to meet some specific requirement. In consequence modern industrial managers have a need, largely unrecognized, to be at least generally aware of the range of possibilities and the ways in which these properties can be successfully exploited.