506.1R-08: Guide to Fiber-Reinforced Shotcrete

506.1R-08: Guide to Fiber-Reinforced Shotcrete

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Description

This guide describes the technology and applications of fiber-reinforced shotcrete (FRS) using synthetic and steel fibers. Mechanical properties, particularly toughness, impact, and flexural strength, are improved by fiber addition, and these improvements are described along with other typical properties and benefits, such as control of shrinkage cracking. Proportions of typical mixtures, batching, mixing, and application procedures are described, including methods of reducing rebound and equipment used to apply FRS. Applications of FRS are described, including rock-slope stabilization work, construction and repair of tunnel and mining linings, fire explosive spalling-resistant linings, channel linings, pools and rockscapes, and structure repair. Available design information is briefly discussed, and design references are listed.

Keywords: fiber-reinforced shotcrete; fibers; linings; mining; repair; steel fibers; synthetic fibers; tunnels.

 

Document Details

Author: ACI Committee 506

Publication Year: 2008

Pages: 12.00

ISBN: 9780870313127

Categories: Shotcrete

Formats: PDF

Table of Contents

Chapter 1—Introduction and scope

1.1—Introduction

1.2—Scope

1.3—Historical background

Chapter 2—Notation and definitions

2.1—Notation

2.2—Definitions

Chapter 3—Materials

3.1—General

3.2—Fibers

3.3—Other materials

Chapter 4—Mixture proportions

4.1—General

4.2—Wet-process

4.3—Dry-process

Chapter 5—Production

5.1—General

5.2—Batching and mixing

5.3—Application

Chapter 6—Test procedures

6.1—General

6.2—Fresh properties

6.3—Hardened properties

Chapter 7—Performance of fiber-reinforced shotcrete

7.1—Flexural strength

7.2—Compressive strength

7.3—Shear strength

7.4—Bond strength

7.5—Rebound considerations

7.6—Shrinkage crack control

7.7—Impact resistance

7.8—Thermal explosive spalling

Chapter 8—Design considerations

8.1—General

8.2—Empirical design

8.3—Comparable moment capacity

Chapter 9—Specification and quality control considerations

9.1—General

9.2—Performance specifications

9.3—Prescriptive specifications

Chapter 10—Applications

10.1—General

10.2—Ground support

10.3—Rehabilitation and repair

10.4—Architectural shotcrete

10.5—Explosive spalling resistance

Chapter 11—References

11.1—Referenced standards and reports

11.2—Cited references

Appendix—Example of comparable moment capacity calculations

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