ACI 304.2R-17 PDF Download

ACI 304.2R-17, the Guide to Placing Concrete by Pumping Methods, provides comprehensive information on the use of pumps for transporting and placing concrete. The standard covers various aspects such as the use of rigid and flexible pipelines, couplings, and other accessories, as well as the different types of concrete pumps available.

One important aspect highlighted in the standard is the need to proportion a concrete mixture that can be easily pumped. It emphasizes the importance of designing a pumpable concrete mixture and provides references for further guidance on this. The standard also encourages the evaluation of trial mixtures to ensure both pumpability and strength.

Additionally, the guide addresses the use of lightweight aggregates and provides information on how to saturate these aggregates and maintain a consistent moisture content. This is particularly important when dealing with such aggregates.

The standard also emphasizes the significance of preconstruction planning, specifically regarding equipment placement and line routing. It emphasizes the importance of achieving a consistent mixture and highlights the critical nature of this aspect in the pumping process.