ACI 238.1R-08 - Report on Measurements of Workability and Rheology of Fresh Concrete

This report provides a comprehensive view of workability of fresh concrete and a critical review of the tests available to measure workability and rheological performance of fresh concrete. The report discusses the factors affecting the performance of fresh concrete and provides a better understanding of the issues related to the design of workable concrete, from no flow (zero-slump) to flow like a liquid (self-consolidating concrete). 70pp.

Chapter 1-Introduction, p. 238.1R-2 Chapter 2-Rheological terms related to concrete, p. 238.1R-2
• 2.1-Notation
• 2.2-Definitions
• 2.3-Shear flow curves
Chapter 3-Test methods, p. 238.1R-4
• 3.1-Introduction
• 3.2-Principles of measurements
• 3.3-Description of existing test methods
• 3.4-Criteria for evaluating test methods
Chapter 4-Factors affecting workability of concrete, p. 238.1R-44
• 4.1-Introduction
• 4.2-Effects of cement
• 4.3-Effects of water content
• 4.4-Effects of aggregates
• 4.5-Effects of chemical admixtures
• 4.6-Effects of supplementary cementitious materials
• 4.7-Effect of mixing procedure
• 4.8-Effects of temperature and time
Chapter 5-Examples of using workability test methods, p. 238.1R-52
• 5.1-Use of gyratory tester to measure workability of noslump concrete
• 5.2-Using rheological measurements to solve problem with flooring grouts
• 5.3-Measuring batch-to-batch consistency of selfconsolidating concrete
• 5.4-Troubleshooting self-consolidating concrete mixtures
• 5.5-Use of rheological approach to optimize cement based grout for underwater crack injection of damaged bridge
Chapter 6-References, p. 238.1R-64
• 6.1-Referenced standards and reports
• 6.2-Cited references