ACI PRC 211.1:2022

CHAPTER 1—INTRODUCTION AND SCOPE, p. 2
1.1—Historical background, p. 2
1.2—Introduction, p. 2
1.3—Scope, p. 3
CHAPTER 2—NOTATION AND DEFINITIONS, p. 3
2.1—Notation, p. 3
2.2—Definitions, p. 4
CHAPTER 3—CONCRETE PROPERTIES, p. 4
3.1—Water-cementitious materials ratio (w/cm), p. 4
3.2—Workability, p. 4
3.3—Consistency, p. 4
3.4—Strength, p. 4
3.5—Durability, p. 5
3.6—Density, p. 5
3.7—Generation of heat, p. 5
3.8—Permeability, p. 5
3.9—Shrinkage, p. 5
3.10—Modulus of elasticity, p. 5
CHAPTER 4—BACKGROUND INFORMATION, p. 6
4.1—Trial batching, p. 6
4.2—Slump, p. 6
4.3—Aggregates, p. 6
4.4—Water, p. 7
4.5—Chemical admixtures, p. 7
4.6—Air, p. 7
4.7—Water-cementitious materials ratio (w/cm), p. 8
CHAPTER 5—PROPORTION SELECTION PROCEDURE, p. 13
5.1—Background, p. 14
5.2—Selection process, p. 14
5.3—Estimation of batch weights, p. 14
CHAPTER 6—EFFECTS OF CHEMICAL ADMIXTURES, p. 17
6.1—Background, p. 17
6.2—Air-entraining admixtures, p. 18
6.3—Water-reducing admixtures, p. 18
CHAPTER 7—EFFECTS OF SUPPLEMENTARY CEMENTITIOUS MATERIALS, p. 19
7.1—Background, p. 19
7.2—Pozzolanic versus cementitious, p. 19
7.3—Types of supplementary cementitious materials, p. 19
7.4—Mixture proportioning with supplementary cementitious materials, p. 20
7.5—Ternary systems, p. 21
7.6—Impact of SCMs on sustainability, p. 21
CHAPTER 8—TRIAL BATCHING, p. 21
CHAPTER 9—SAMPLE COMPUTATIONS, p. 21
9.1—Background, p. 21
9.2—Example 1: Mixture proportioning using portland cement only, p. 22
9.3—Example 2: Mixture proportioning of binary mixture containing fly ash, p. 24
9.4—Example 3: Mixture proportioning using cementitious efficiency factor, p. 26
9.5—Example 4: Mixture proportioning using target paste volume, p. 27
CHAPTER 10—REFERENCES, p. 28
Authored documents, p. 29
APPENDIX A—LABORATORY TESTS, p. 29
A.1—Need for laboratory testing, p.29
A.2—Prequalification of materials, p. 30
A.3—Properties of cementitious materials, p. 30
A.4—Properties of aggregates, p. 30
A.5—Trial batch series, p. 31
A.6—Test methods, p. 31
A.7—Mixtures for small jobs, p. 32
APPENDIX B—HIGH-DENSITY CONCRETE MIXTURE PROPORTIONING, p. 33
B.1—General, p. 33
B.2—Aggregate selection, p. 33
B.3—Adjustment in anticipation of drying, p. 33
B.4—Adjustment for entrained air , p. 33
B.5—Handling of high-density aggregates, p. 33
B.6—Preplaced aggregate , p. 33

This guide describes a method for selecting proportions for concrete made with hydraulic cement meeting ASTM C150/ C150M, C595/C595M, or C1157/C1157M with or without other cementitious materials, chemical admixtures, or both.