ACI PRC-225-23 Guide to the Selection and Use of Hydraulic Cements

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Description

The update to this guide includes a statement on life-cycle analysis (LCA), environmental product delcarations (EPDs), and a new section on carbonation (10.6). This guide covers the influence of cement on the properties of concrete, summarizing the composition and availability of commercial hydraulic cements and the factors affecting their performance in concrete. Cement is the most active component of concrete and usually has the greatest unit cost; therefore, its selection and proper use is imperative to attaining the desired balance of properties and cost for a particular concrete mixture. Selection should include consideration of the cement properties in relation to the required performance of the concrete. It includes a discussion of cement types, a brief review of cement chemistry, the influences of chemical admixtures and supplementary cementitious materials, as well as the effects of the environment on cement performance and reviews of the sustainability aspects for the use and manufacture of portland cement. Cement storage, delivery, sampling, and testing of hydraulic cements for conformance to specifications are addressed. Users will learn to recognize when a readily available, general-purpose cement will perform satisfactorily or when conditions require selection of a cement that meets additional requirements.

Keywords:

admixture; blended cement; calcium-aluminate cement; cement storage; cement types; chemical analysis; hydraulic cement; physical properties; portland cement; pozzolan; slag cement; supplementary cementitious materials; sustainability.

 

Document Details

Author: ACI Committee 225

Publication Year: 2023

Pages: 40

ISBN: 9781641952316

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. 3

2.1—Notation, p. 3

2.2—Definitions, p. 3

CHAPTER 3—CEMENT TYPES, AVAILABILITY, AND SELECTION, p. 3

3.1—Portland and blended hydraulic cements, p. 3

3.2—Special-purpose cement, p. 4

3.3—Research and development, p. 5

3.4—Rational approach to selection, p. 5

CHAPTER 4—CEMENT CHEMISTRY, p. 7

4.1—Portland cement, p. 7

4.2—Blended hydraulic cement, p. 10

4.3—Shrinkage-compensating expansive cement, p. 12

4.4—Calcium-aluminate cement, p. 12

CHAPTER 5—INFLUENCE OF CHEMICAL ADMIXTURES, POZZOLANS, AND SLAG CEMENTS ON CEMENTITIOUS SYSTEMS, p. 12

5.1—Air-entraining admixtures, p. 13

5.2—Other chemical admixtures, p. 13

5.3—Pozzolans, p. 14

5.4—Slag cements, p. 15

CHAPTER 6—INFLUENCE OF ENVIRONMENTAL CONDITIONS ON THE HYDRATION OF CEMENTS, p. 15

6.1—Water requirements, p. 15

6.2—Temperature effects, p. 15

6.3—Composition, p. 16

CHAPTER 7—INFLUENCE OF CEMENT ON CONCRETE PROPERTIES, p. 16

7.1—Thermal cracking, p. 16

7.2—Placeability, p. 17

7.3—Strength, p. 18

7.4—Volume stability, p. 19

7.5—Elastic properties, p. 19

7.6—Creep, p. 20

7.7—Permeability, p. 20

7.8—Corrosion of embedded steel, p. 21

7.9—Resistance to freezing and thawing, p. 21

7.10—Resistance to chemical attack, p. 21

7.11—Resistance to high temperatures, p. 21

7.12—Aggregate reactions in concrete, p. 22

7.13—Color, p. 22

CHAPTER 8—CEMENT STORAGE AND DELIVERY, p. 23

8.1—Storage, p. 23

8.2—Pack set (sticky cement), p. 23

8.3—Delivery, p. 24

8.4—Contamination and handling, p. 24

8.5—Worker protection, p. 24

CHAPTER 9—SAMPLING AND TESTING HYDRAULIC CEMENTS FOR CONFORMANCE TO SPECIFICATIONS, p. 24

9.1—Cement mill test reports, p. 25

9.2—Sealed silos, p. 27

9.3—Cement certification, p. 27

9.4—Quality management, p. 27

CHAPTER 10—SUSTAINABILITY ASPECTS OF HYDRAULIC CEMENTS, p. 29

10.1—Hydraulic cements, p. 29

10.2—Energy consumption, p. 29

10.3—Use of SCMs as replacement for portland cement, p. 29

10.4—Use of cement in concrete, p. 29

10.5—Recycled raw materials as raw feed in the manufacture of portland cement, p. 30

10.6—Alternate fuels, p. 30

10.7—Combustion emissions, p. 30

10.8—Recent progress and strategy, p. 31

10.9—Carbonation, p. 31

CHAPTER 11—REFERENCES, p. 31

Authored documents, p. 33

APPENDIX A—CALCIUM-ALUMINATE CEMENTS, p. 36

A.1—Manufacture and properties, p. 36

A.2—Influences of admixtures and supplementary cementitious materials, p. 37

A.3—Influence of environment, p. 37

A.4—Heat of hydration, p. 37

A.5—Setting characteristics, p. 37

A.6—Strength, p. 37

A.7—Resistance to chemical attack, p. 38

A.8���Resistance to high temperatures, p. 38

APPENDIX B––MANUFACTURER’S CERTIFICATION (MILL TEST REPORT), p. 39

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