Chemical Admixtures for Concrete, Part 2-ACI Education Bulletin E4 Chemical Admixtures for Concrete (PDF)

ACI Education Bulletin E4 Chemical Admixtures for Concrete (PDF)

Pdf Summary

The document titled "Chemical Admixtures for Concrete," developed by ACI Committee E701, serves as an educational resource for ACI University, teaching about the various chemical admixtures used in concrete and their effects. The publication is not a technical user's guide but provides a basic understanding of the role, function, and benefits of chemical admixtures. It references more detailed information from ACI 212.3R.<br /><br />The bulletin discusses different types of chemical admixtures that can modify the properties of concrete in both its fresh and hardened states. These include air-entraining admixtures for enhancing concrete durability in conditions susceptible to freeze-thaw cycles, water-reducing admixtures to lower the water content required without reducing workability, set-controlling admixtures for managing concrete setting time, and high-range water-reducing admixtures, often called superplasticizers, for producing highly fluid mixtures. It also covers specialty admixtures that address issues such as corrosion inhibition, shrinkage reduction, alkali-silica reactivity, and permeability reduction.<br /><br />Details on admixture dispensers, their maintenance, and industry requirements for accuracy and compatibility are provided to ensure correct application in various contexts. The bulletin also emphasizes the importance of testing admixtures to ensure their effectiveness and compatibility in specific concrete mixtures.<br /><br />This document underscores admixtures as significant contributors to improving concrete quality and performance, calling for responsible use and comprehensive testing. It is a resource for those new to concrete construction and interested in modern advancements in concrete admixture technology. The document also includes a glossary for better understanding of terms, and it directs interested users to supplementary information available through ACI's standards and educational programs.

Keywords

chemical admixtures

concrete durability

air-entraining

water-reducing

superplasticizers

corrosion inhibition

shrinkage reduction

alkali-silica reactivity

admixture testing

ACI standards