549.4R-13 Guide to Design and Construction of Externally Bonded Fabric-Reinforced Cementitious Matrix (FRCM) Systems for

549.4R-13 Guide to Design and Construction of Externally Bonded Fabric-Reinforced Cementitious Matrix (FRCM) Systems for

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Description

Fabric-reinforced cementitious matrix (FRCM) systems for repairing and strengthening concrete and masonry structures are an alternative to traditional techniques such as fiber-reinforced polymers (FRPs), steel plate bonding, section enlargement, and external post-tensioning. An FRCM is a composite material consisting of one or more layers of cement-based matrix reinforced with dry fibers in the form of open mesh or fabric. The cement-based matrixes are typically made of combinations of portland cement, silica fume, and fly ash as the binder. When adhered to concrete or masonry structural members, they form an FRCM system that acts as supplemental, externally bonded reinforcement. This guide addresses the history and use of FRCM system repair and strengthening; their unique material properties; and recommendations on their design, construction, and inspection. Guidelines are based on experimental research, analytical work, and field applications.

Keywords: bridges; buildings; cracking; cyclic loading; deflection; development length; earthquake-resistant; fabric-reinforced cementitious matrix; fatigue; fiber-reinforced polymer; flexure; lap splices; masonry; meshes; mortar matrix; shear; stress; structural analysis; structural design; substrate repair; surface reparation; unreinforced masonry.

 

Document Details

Author: ACI Committee 549

Publication Year: 2013

Pages: 69.00

ISBN: 9780870318528

Categories: Ferrocement

Formats: PDF, ePub, or Kindle

Table of Contents

CHAPTER 1—INTRODUCTION AND SCOPE

1.1—Introduction

1.2—Scope

CHAPTER 2—NOTATION AND DEFINITIONS

2.1—Notation

2.2—Definitions

CHAPTER 3—BACKGROUND

3.1—FRCM systems advantages and disadvantages

3.2—Historical development

3.3—Commercially available FRCM systems

CHAPTER 4—FIELD APPLICATION EXAMPLES

4.1—Concrete repair applications

4.2—Masonry repair applications

CHAPTER 5—FRCM CONSTITUENT MATERIALS AND SYSTEM QUALIFICATIONS

5.1—Constituent materials

5.2—Fabric-reinforced cementitious matrix system qualification,

5.3—Physical and mechanical properties

5.4—Durability

CHAPTER 6—SHIPPING, STORAGE, AND HANDLING

6.1—Shipping

6.2—Storage

6.3—Handling

CHAPTER 7—INSTALLATION

7.1—Contractor qualifications

7.2—Environmental considerations

7.3—Equipment

7.4—Substrate repair and surface preparation

7.5—Mixing of mortar matrix

7.6—Application of FRCM systems

7.7—Alignment of FRCM reinforcement

7.8—Multiple meshes and lap splices

7.9—Curing of mortar matrix

7.10—Temporary protection

CHAPTER 8—INSPECTION, EVALUATION, AND ACCEPTANCE

8.1—Inspection

8.2—Evaluation and acceptance

CHAPTER 9—MAINTENANCE AND REPAIR

9.1—General

9.2—Inspection and assessment

9.3—Repair of strengthening system

9.4—Repair of surface coating

CHAPTER 10—GENERAL DESIGN CONSIDERATIONS FOR REINFORCED CONCRETE STRENGTHENED WITH FRCM

10.1—Design philosophy

10.2—Strengthening limits

10.3—Selection of FRCM system

10.4—Design properties

CHAPTER 11—STRENGTHENING OF REINFORCED CONCRETE MEMBERS WITH FRCM

11.1—FRCM contribution to flexural strength

11.2—Shear strengthening

11.3—Strengthening for axial force

11.4—Design axial strength

CHAPTER 12—GENERAL DESIGN CONSIDERATIONS FOR MASONRY STRENGTHENED WITH FRCM

12.1—Design philosophy

12.2—Strengthening limits

12.3—Design properties

CHAPTER 13—STRENGTHENING OF MASONRY WALLS WITH FRCM

13.1—Out-of-plane loads

13.2—In-plane loads

CHAPTER 14—FRCM REINFORCEMENT DETAILS

14.1—Bond and delamination

CHAPTER 15—DRAWINGS, SPECIFICATIONS, AND SUBMITTALS

15.1—Engineering requirements

15.2—Drawings and specifications

15.3—Submittals

CHAPTER 16—DESIGN EXAMPLES

16.1—Flexural strengthening of interior RC slab

16.2—Flexural strengthening of RC bridge deck (soffit)

16.3—Shear strengthening of RC T-beam

16.4—Shear strengthening of RC column

16.5—Axial strengthening of RC column subject to pure compression

16.6—Flexural strengthening of unreinforced masonry (URM) wall subjected to out-of-plane loads

16.7—Shear strengthening of URM wall subjected to in-plane loads

CHAPTER 17—REFERENCES

Cited references

APPENDIX A—CONSTITUENT MATERIALS

PROPERTIES OF COMMERCIALLY AVAILABLE FRCM SYSTEMS

APPENDIX B—DESIGN LIMITATIONS

ERRATA INFO

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