ACI 304.4R-20 (IN-LB, SI) PDF Download

ACI 304.4R-20 is a standard. This standard provides a comprehensive overview of the design, selection, use, and maintenance of conveyor belts for transporting and placing concrete. It begins with a historical background on the development of conveyor belts for concrete transportation and then delves into the design considerations based on the properties of the plastic concrete, delivery rate, and job specifications.

The standard also covers important factors such as belt widths, speeds, and angles of inclination, which are tailored to specific site requirements. It explores the three types of concrete conveyors: portable, feeder, and spreader, and their respective applications. Field practices for selecting, using, and maintaining conveyors are discussed, emphasizing the importance of ensuring the quality of the in-place concrete and implementing thorough inspection procedures.

In addition, the standard addresses the economic aspects of belt conveyor placement, highlighting the cost-effectiveness and efficiency of this method. It underlines the need for proper selection and maintenance of conveyor systems to optimize their performance and longevity.