222.2R-14 Report on Corrosion of Prestressing Steels

222.2R-14 Report on Corrosion of Prestressing Steels

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Description

This report covers various types of prestressing steel, including some discussion on metallurgical differences, and supplements information presented in ACI 222R to include topics specifically related to prestressing steels. Deterioration mechanisms are discussed, including hydrogen embrittlement and stress-corrosion cracking. Methods to protect prestressing steel against corrosion in new construction are presented, along with a discussion of field performance of prestressed concrete structures. Finally, field evaluation and remediation techniques are presented. Appendixes present detailed information on stress corrosion cracking and hydrogen embrittlement issues in prestressed concrete and mitigation techniques.

Keywords: anchorage; bonded; corrosion; duct; durability; grout; hydrogen embrittlement; post-tensioned; prestressed; tendon; strand; stress-corrosion cracking; unbonded.

Document Details

Author: ACI Committee 222

Publication Year: 2014

Pages: 48.00

ISBN: 9780870319235

Categories: Corrosion

Formats: PDF, ePub, or Kindle

Table of Contents

CHAPTER 1—INTRODUCTION

1.1—Background

1.2—Scope

CHAPTER 2—DEFINITIONS

CHAPTER 3—PRESTRESSING STEELS

3.1—Wire

3.2—Strand

3.3—Bar

CHAPTER 4—DETERIORATION OF PRESTRESSING STEELS

CHAPTER 5—PROTECTION AGAINST CORROSION IN NEW CONSTRUCTION

5.1—Introduction and history

5.2—Prestressing tendon materials selection

5.3—Corrosion protection for prestressing systems

5.4—Cathodic protection

CHAPTER 6—FIELD EVALUATION

6.1—Introduction

6.2—Evaluation goals

6.3—Pretensioned structures

6.4—Post-tensioned structures

CHAPTER 7—REMEDIATION TECHNIQUES

7.1—Introduction

7.2—General

7.3—Bonded post-tensioned tendons

7.4—Unbonded multistrand post-tensioned tendons

CHAPTER 8—FIELD PERFORMANCE OF PRESTRESSED CONCRETE STRUCTURES

8.1—Introduction

8.2—Corrosion of prestressing strand before construction

8.3—Pretensioned structures

8.4—Unbonded post-tensioned structures

8.5—Bonded post-tensioned structures

8.6—Wire-wrapped prestressed structures

CHAPTER 9—REFERENCES

APPENDIX A—PRESTRESSING STEEL METALLURGY

A.1—Wire

A.2—Strand

A.3—Bar

APPENDIX B—DETERIORATION OF PRESTRESSING STEEL

B.1—Metallurgy of prestressing steels

B.2—Stress-corrosion cracking and hydrogen embrittlement

B.3—Case histories

B.4—Stress-corrosion cracking

B.5—Hydrogen embrittlement

B.6—Corrosion effect on fatigue performance

B.7—Testing for SCC and HE

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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