ACI 211.1 2022

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ACI PRC-211.1-22: Selecting Proportions for Normal-Density and High Density-Concrete – Guide

Published By	Publication Date	Number of Pages
ACI	2022

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Description

This guide to concrete proportioning provides background information on, and a procedure for, selecting and adjusting concrete mixture proportions. It applies to normal-density concrete, both with and without chemical admixtures, supplementary cementitious materials, or both. The procedure uses calculations based on the absolute volumes occupied by the mixture constituents. The procedure incorporates consideration of requirements for aggregate gradation, workability, strength, and durability. Example calculations are provided, including adjustments based on the results of the first trial batch. Appendixes cover laboratory tests and proportioning of high-density concretes. Keywords: absolute volume; admixtures; air content; durability; mixture proportioning; supplementary cementitious materials; trial batching; water-cementitious materials ratio (w/cm); workability; yield.

PDF Catalog

PDF Pages	PDF Title
3	TITLE PAGE
4	CHAPTER 1—INTRODUCTION AND SCOPE 1.1—Historical background 1.2—Introduction
5	1.3—Scope CHAPTER 2—NOTATION AND DEFINITIONS 2.1—Notation
6	2.2—Definitions CHAPTER 3—CONCRETE PROPERTIES 3.1—Water-cementitious materials ratio (w/cm) 3.2—Workability 3.3—Consistency 3.4—Strength
7	3.5—Durability 3.6—Density 3.7—Generation of heat 3.8—Permeability 3.9—Shrinkage 3.10—Modulus of elasticity
8	CHAPTER 4—BACKGROUND INFORMATION 4.1—Trial batching 4.2—Slump 4.3—Aggregates
9	4.4—Water 4.5—Chemical admixtures 4.6—Air
10	4.7—Water-cementitious materials ratio (w/cm)
15	CHAPTER 5—PROPORTION SELECTION PROCEDURE
16	5.1—Background 5.2—Selection process 5.3—Estimation of batch weights
19	CHAPTER 6—EFFECTS OF CHEMICAL ADMIXTURES 6.1—Background
20	6.2—Air-entraining admixtures 6.3—Water-reducing admixtures
21	CHAPTER 7—EFFECTS OF SUPPLEMENTARY CEMENTITIOUS MATERIALS 7.1—Background 7.2—Pozzolanic versus cementitious 7.3—Types of supplementary cementitious materials
22	7.4—Mixture proportioning with supplementary cementitious materials
23	7.5—Ternary systems 7.6—Impact of SCMs on sustainability CHAPTER 8—TRIAL BATCHING CHAPTER 9—SAMPLE COMPUTATIONS 9.1—Background
24	9.2—Example 1: Mixture proportioning using portland cement only
26	9.3—Example 2: Mixture proportioning of binary mixture containing fly ash
28	9.4—Example 3: Mixture proportioning using cementitious efficiency factor
29	9.5—Example 4: Mixture proportioning using target paste volume
30	CHAPTER 10—REFERENCES
31	Authored documents APPENDIX A—LABORATORY TESTS A.1—Need for laboratory testing
32	A.2—Prequalification of materials A.3—Properties of cementitious materials A.4—Properties of aggregates
33	A.5—Trial batch series A.6—Test methods
34	A.7—Mixtures for small jobs
35	APPENDIX B—HIGH-DENSITY CONCRETE MIXTURE PROPORTIONING B.1—General B.2—Aggregate selection B.3—Adjustment in anticipation of drying B.4—Adjustment for entrained air B.5—Handling of high-density aggregates B.6—Preplaced aggregate