R608.5

Section R608.5 is titled 'Materials' and covers the requirements for materials allowed to be used in making concrete. This section contains no technical language, but establishes that its subsections must be adhered to which contain technical criteria about concrete materials. The purpose of this section is to prevent structural failure and prevent premature degradation of concrete.

The model shows a pile of course aggregate, fine aggregate, and cement, which along with water, are the key materials used in making concrete.