309R-05: Guide for Consolidation of Concrete

309R-05: Guide for Consolidation of Concrete

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Description

Consolidation is the process of removing entrapped air from freshly placed concrete. Several methods and techniques are available, the choice depending on the workability of the mixture, placing conditions, and degree of air removal desired. Some form of vibration is usually employed. 

This guide includes information on the mechanism of consolidation and gives recommendations on equipment, characteristics, and procedures for various classes of construction.

Document Details

Author: ACI Committee 309

Publication Year: 2005

Pages: 36.00

ISBN: 9780870311901

Categories: Consolidation

Formats: Printed Document or PDF

Table of Contents

Chapter 1—General

Chapter 2—Effect of mixture proportions on consolidation

2.1—Mixture proportions

2.2—Workability and consistency

2.3—Workability requirements

Chapter 3—Methods of consolidation

3.1—Manual methods

3.2—Mechanical methods

3.3—Methods used in combination

Chapter 4—Consolidation of concrete by vibration

4.1—Vibratory motion

4.2—Process of consolidation

Chapter 5—Equipment for vibration

5.1—Internal vibrators

5.2—Form vibrators

5.3—Vibrating tables

5.4—Surface vibrators

5.5—Vibrator maintenance

Chapter 6—Forms

6.1—General

6.2—Sloping surfaces

6.3—Surface blemishes

6.4—Form tightness

6.5—Forms for external vibration

Chapter 7—Recommended vibration practices for general construction

7.1—General

7.2—Procedure for internal vibration

7.3—Adequacy of internal vibration

7.4—Vibration of reinforcement

7.5—Revibration

7.6—Form vibration

7.7—Consequences of improper vibration

Chapter 8—Structural concrete

8.1—Design and detailing prerequisites

8.2—Mixture requirements

8.3—Internal vibration

8.4—Form vibration

8.5—Tunnel linings

Chapter 9—Mass concrete

9.1—Mixture requirements

9.2—Vibration equipment

9.3—Forms

9.4—Vibration practices

9.5—Roller-compacted concrete

Chapter 10—Normal-density concrete floor slabs

10.1—Mixture requirements

10.2—Equipment

10.3—Structural slabs

10.4—Slabs on ground

10.5—Heavy-duty industrial floors

10.6—Vacuum dewatering

Chapter 11—Pavements

11.1—General

11.2—Mixture requirements

11.3—Equipment

11.4—Vibration procedures

11.5—Special precautions

Chapter 12—Precast products

12.1—General

12.2—Mixture requirements

12.3—Forming material

12.4—Choice of consolidation method

12.5—Placing methods

Chapter 13—Structural low-density concrete

13.1—General

13.2—Mixture requirements

13.3—Behavior of structural low-density concrete during vibration

13.4—Consolidation equipment and procedures

13.5—Floors

Chapter 14—High-density concrete

14.1—General

14.2—Mixture requirements

14.3—Placing techniques

Chapter 15—Self-consolidating concrete

15.1—General

Chapter 16—Quality control and quality assurance

16.1—General

16.2—Adequacy equipment and procedures

16.3—Checking equipment performance

Chapter 17—Consolidation of test specimens

17.1—Strength

17.2—Density

17.3—Air content

17.4—Consolidating very stiff concrete in laboratory specimens

Chapter 18—Consolidation in congested areas

18.1—Common placing problems

18.2—Consolidation techniques

Chapter 19—References

19.1—Referenced standards and reports

19.2—Cited references

Appendix—Fundamentals of vibration

A.1—Principles of simple harmonic motion

A.2—Action of a rotary vibrator

A.3—Vibratory motion in the concrete

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 Manual of Concrete Practice (MCP). For a listing of and access to all product errata, visit the Errata page.

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