212.3R-04
Chemical Admixtures for Concrete
2004, 30 pp.
$77.50

This report updates the previous 1991 report. Chemical Admixtures, which are primarily water-soluble substances, are discussed. Finely divided mineral admixtures are dealt with by ACI Committees 232, Fly Ash and Natural Pozzolans in Concrete, and 234, Silica Fume in Concrete. For the purpose of this report, chemical admixtures are classified into five groups: air-entraining; accelerating; water-reducing and set-controlling; admixtures for flowing concrete; and miscellaneous. Admixtures possessing properties identifiable with more than one group are discussed with the group that describes its most important effect on concrete.

Keywords: adhesives; admixture; air-entraining; alkali-aggregate reaction; bond; calcium chloride; concrete; corrosion inhibitor; flowing concrete; grouting; high-range water-reducing admixture; pigment; plasticizer; pumped concrete; retardon; water-reducing admixture.

Contents:
CONTENTS:

Chapter 1—General information

1.1—Introduction

1.2—Reasons for using admixtures

1.3—Specifications for admixtures

1.4—Sampling and testing

1.5—Cost effectiveness

1.6—Considerations for using admixtures

1.7—Preparation and batching

Chapter 2—Air-entraining admixtures

2.1—Introduction

2.2—Entrained air-void system

2.3—Effects on concrete properties

2.4—Materials for air entrainment

2.5—Applications

2.6—Evaluation and testing

2.7—Batching and storage

2.8—Factors influencing the amount of entrained

2.9—Controlling air content in concrete

Chapter 3—Accelerating admixtures

3.1—Introduction

3.2—Types of accelerating admixtures

3.3—Use with special cements

3.4—Effects on hardening concrete

3.5—Effects on concrete durability

3.6—Corrosion of metals

3.7—Discoloration of flatwork

3.8—Dosage levels

Chapter 4—Water-reducing and set-controlling admixtures

4.1—Introduction

4.2—Classification and composition

4.3—Applications

4.4—Dosage

4.5—Preparation, batching, and quality control

4.6—Proportioning concrete

4.7—Effects on fresh concrete

4.8—Effects on hardened concrete

4.9—Evaluations

Chapter 5—Admixtures for flowing concrete,

5.1—Introduction

5.2—Materials

5.3—Selection and evaluation

5.4—Applications

5.5—Proportioning concrete

5.6—Effect on fresh and hardening concrete

5.7—Effect on hardened concrete

5.8—Quality assurance

Chapter 6—Miscellaneous admixtures

6.1—Gas-forming admixtures

6.2—Grouting admixtures

6.3—Extended set-control admixtures

6.4—Bonding admixtures

6.5—Pumping aids

6.6—Pigments

6.7—Flocculating admixtures

6.8—Fungicidal, germicidal, and insecticidal admixtures

6.9—Permeability-reducing admixtures

6.10—Chemical admixtures to reduce alkali-aggregate reaction expansion

6.11—Corrosion-inhibiting admixtures

6.12—Antiwashout admixtures

6.13—Freeze-resistant admixtures

Chapter 7—References

7.1—Referenced standards and reports

7.2—Cited references