ACI PRC-211.10-24: Assessing Combined Aggregate Gradings—Guide

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Description

This guide provides background and examples on the use of practical aggregate grading tools to improve aggregate performance in concrete and allow the paste content of a concrete mixture to be reduced while achieving satisfactory workability and physical properties. The aggregate grading of a concrete mixture impacts the workability, durability, strength, and sustainability of concrete. These grading tools can also be used to proportion concrete mixtures as well as troubleshoot issues associated with mixtures from high to low workability. This guide does not make recommendations, but it does describe and give examples on how to use these tools.

Keywords:

aggregate; aggregate grading; coarseness factor chart; gap graded; individual percent retained (IPR) chart; particle shape; Power 45 curve; proportioning aggregate; tarantula curve; well-graded aggregate.

 

Document Details

Author: ACI Committee 211

Publication Year: 2024

Pages: 25

ISBN: 9781641952842

Formats: Printed Document or Protected PDF/Web View

Table of Contents

CHAPTER 1—INTRODUCTION AND SCOPE, p. 2

1.1—Introduction, p. 2

1.2—Scope, p. 2

CHAPTER 2—NOTATION AND DEFINITIONS, p. 2

2.1—Notation, p. 2

2.2—Definitions, p. 2

CHAPTER 3—THEORY OF GRADING TECHNIQUES, p. 2

3.1—Introduction, p. 2

3.2—Combined aggregate grading techniques, p. 2

3.3—Individual percent retained chart, p. 3

3.4—Tarantula curve, p. 3

3.5—Coarseness factor chart, p. 5

3.6—Power 45 chart, p. 5

3.7—Incorporating the aggregate grading into the mixture design, p. 6

CHAPTER 4—APPLYING GRADING TECHNIQUES, p. 6

4.1—Introduction, p. 6

4.2—Example I: three-aggregate system for slip-formed pavement, p. 6

4.3—Example II: four-aggregate system for footings, walls, and floor slabs, p. 9

4.4—Example III: four-aggregate system for an airport runway using a slip form paver, p. 11

4.5—Example IV: two-aggregate system for slip formed pavement, p. 13

4.6—Example V: two-aggregate system for footings, walls, and floor slabs, p. 15

4.7—Example VI—three-aggregate system for slip formed pavement, p. 19

CHAPTER 5—SUMMARY, p. 24

CHAPTER 6—REFERENCES, p. 24

Authored documents, p. 24

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