ACI 211.9R-18 PDF Download

The ACI 211.9R-18 standard provides guidelines and recommendations for selecting the appropriate proportions of components in hydraulic-cement concrete that is placed using pumping methods. The guide aims to ensure efficient concrete pumping results by offering specific numerical guidelines for mixture component proportions. It also includes comments on the impact of pumping on the supplied concrete and how the proportions of the mixture affect its pumpability.

This standard is designed to complement ACI 304.2R and serves as a supplement to ACI 211.1 and ACI 211.2. It provides valuable information for engineers, contractors, and other professionals involved in concrete pumping applications. One important aspect discussed in the guide is the distinction between mass and weight. While mass refers to the amount of matter present, weight depends on both mass and the acceleration due to gravity. In the engineering system, weight is often used interchangeably with mass since the numerical values are the same. However, in the SI system, mass is expressed in grams, and weight is expressed in Newtons.