ACI PRC-223-21: Shrinkage-Compensating Concrete - Guide

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Description

Shrinkage-compensating concrete is used in construction to minimize drying-shrinkage cracking. Its characteristics are similar to those of portland-cement concrete. The materials, proportions, placement, and curing should ensure that expansion compensates for subsequent drying shrinkage.

This guide sets forth criteria and practices to ensure the development of expansive strain in concrete. In addition to a discussion of basic principles, methods and details are given covering structural design details and applications, concrete mixture proportioning, placement, finishing, and curing.

The materials, processes, quality control measures, and inspections described in this document should be tested, monitored, or performed as applicable only by individuals holding the appropriate ACI certifications or equivalent.

Keywords:

calcium cement; drying shrinkage; expansion cement; mixture proportions; restraints; shrinkage-compensating concrete; shrinkage cracking; slab-on-ground; structural design.

 

Document Details

Author: ACI Committee 223

Publication Year: 2021

Pages: 36

ISBN: 9781641951647

Formats: 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—DEFINITIONS, p. 2

2.1—Definitions, p. 2

CHAPTER 3—GENERAL CONSIDERATIONS, p. 2

3.1—Preconstruction meeting, p. 3

CHAPTER 4—MATERIALS, p. 3

4.1—Expansive cement and expansive component systems, p. 3

4.2—Aggregates, p. 3

4.3—Water, p. 4

4.4—Admixtures, p. 4

4.5—Concrete, p. 4

CHAPTER 5—STRUCTURAL DESIGN DETAILS AND APPLICATIONS, p. 5

5.1—Behavior of shrinkage-compensating concrete, p. 5

5.2—Member types, p. 9

5.3—Post-tensioned slabs and beams, p. 9

5.4—Slabs-on-ground, p. 11

5.5—Overlays and toppings slabs, p. 16

5.6—Bridge decks, p. 18

5.7—Airport pavements, p. 21

5.8—Tanks, p. 23

CHAPTER 6—CONCRETE MIXTURE PROPORTIONING, p. 26

6.1—General, p. 26

6.2—Concrete proportions, p. 26

6.3—Admixtures, p. 26

6.4—Consistency, p. 26

6.5—Mixture proportioning procedures, p. 26

6.6—Batching, p. 27

CHAPTER 7—PLACING, FINISHING, AND CURING, p. 27

7.1—Placing, p. 27

7.2—Finishing, p. 28

7.3—Curing, p. 28

CHAPTER 8—SUSTAINABLE ATTRIBUTES OF SHRINKAGE-COMPENSATING CONCRETE, p. 28

CHAPTER 9—REFERENCES, p. 29

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