232.2R-18: Report on the Use of Fly Ash in Concrete

232.2R-18: Report on the Use of Fly Ash in Concrete

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Description

Fly ash is used in concrete and other portland cement-based systems primarily because of its pozzolanic and cementitious properties. These properties contribute to strength gain and are known to improve the performance of fresh and hardened concrete, mortar, and grout. The use of fly ash typically results in more economical concrete construction.

This report gives an overview of the origin and properties of fly ash, its effect on the properties of hydraulic cement concrete, and the selection and use of fly ash in the production of hydraulic cement concrete and concrete products. Information and recommendations concerning the selection and use of Class C and Class F fly ashes conforming to the requirements of ASTM C618 are provided. Topics covered include a detailed description of the composition of fly ash, the physical and chemical effects of fly ash on properties of concrete, guidance on the handling and use of fly ash in concrete construction, use of fly ash in the production of concrete products and specialty concretes, and recommended procedures for quality control. High-volume fly ash concrete is covered in a general way in this report; readers can consult ACI 232.3R for more information.

Keywords: alkali-aggregate reaction; controlled low-strength material; durability; fly ash; mass concrete; pozzolan; sulfate resistance; sustainability; workability.

 

Document Details

Author: ACI Committee 232

Publication Year: 2018

Pages: 56.00

ISBN: 9781641950060

Categories: Fly Ash

Formats: Printed Document or PDF

Table of Contents

Contents

CHAPTER 1—INTRODUCTION, SCOPE, SOURCES, AND SUSTAINABILITY

1.1—Introduction

1.2—Scope

1.3—Source of fly ash

1.4—Fly ash and sustainability

CHAPTER 2—DEFINITIONS

CHAPTER 3—FLY ASH COMPOSITION

3.1—General

3.2—Chemical composition

3.3—Crystalline constituents

3.4—Glassy constituents

3.5—Physical properties

3.6—Chemical activity of fly ash in hydraulic cement concrete

3.7—Future research needs

CHAPTER 4—EFFECTS OF FLY ASH ON CONCRETE

4.1—Effects on properties of fresh concrete

4.2—Effects on properties of hardened concrete

CHAPTER 5—CONCRETE MIXTURE PROPORTIONING

5.1—General

5.2—Considerations in mixture proportioning

CHAPTER 6—FLY ASH SPECIFICATIONS, TEST METHODS, AND QUALITY ASSURANCE/QUALITY CONTROL

6.1—Introduction

6.2—Chemical requirements

6.3—Physical requirements

6.4—General specification provisions

6.5—Methods of sampling and testing

6.6—Source quality control

6.7—Startup, oil, and stack additives

6.8—Rapid quality control tests

CHAPTER 7—FLY ASH IN CONCRETE CONSTRUCTION

7.1—Ready mixed concrete

7.2—Concrete pavement

7.3—Mass concrete

7.4—Roller-compacted concrete

7.5—Self-consolidating concrete

7.6—High-volume fly ash concrete

7.7—High-performance concrete

7.8—Long-life structures

7.9—Bulk handling and storage

7.10—Batching

CHAPTER 8—FLY ASH IN CONCRETE PRODUCTS

8.1—Concrete masonry units

8.2—Concrete pipe

8.3—Precast/prestressed concrete products

8.4—No-slump extruded hollow core slabs

8.5—Concrete tile

8.6—Miscellaneous concrete products

CHAPTER 9—OTHER USES OF FLY ASH

9.1—Grouts and mortar

9.2—Controlled low-strength material

9.3—Soil cement

9.4—Plastering

9.5—Cellular concrete

9.6—Shotcrete

9.7—Waste management

9.8—Cements

CHAPTER 10—REFERENCES

Authored documents

APPENDIX A—RAPID QUALITY CONTROL TESTS

A.1—Loss on ignition

A.2—Carbon analysis

A.3—Particle size

A.4—Color

A.5—Density (specific gravity)

A.6—Fly ash adsorption

A.7—Organic material

A.8—CaO content

A.9—Presence of hydrocarbons (startup oil)

A.10—Presence of ammonia (precipitator additive)

A.11—Calorimetry

ERRATA INFO

Any applicable errata are included with individual documents at the time of purchase. Errata are not included for collections or sets of documents such as the ACI Collection. For a listing of and access to all product errata, visit the Errata page.

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