introduCtion Production Materials Materials used in the manufacture of precast concrete pipe consist of locally available aggregates and manufactured products, such as portland cement and steel reinforcement. Each of the materials is covered by an ASTM standard relative to its properties and methods of testing. High quality precast concrete pipe is manufactured using state-of-the-art facilities, processes and equipment, integrated under controlled conditions. Several different processes are used, each capable of producing precast concrete pipe that conforms to the requirements of applicable standards. The following sections provide an overview of the materials used to produce a concrete product of consistently high quality. The primary components of reinforced concrete pipe include the following: • • • • • Cement Fly Ash Water Aggregates Steel Reinforcement ConCrete pipe stormwater treatment teChnologies box seCtions manhole and CatCh basin material LAFARGE PIPE eMANUAL PAGE 13