ACI PRC-423.8-21: Corrosion and Repair of Grouted Post-Tensioning Tendon Systems - Report

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Description

This report provides general information regarding the evaluation of corrosion damage in structures reinforced with grouted multistrand and bar tendons. A review of current practice is included along with the historical background. Specific potential problem areas for grouted tendons are discussed for each critical part of the tendon. Current methods for evaluating corrosion damage and typical repair schemes are included.

Keywords:

anchorage; bonded; corrosion; duct; durability; grout; post-tensioning; prestressed; repair; strand; tendon.

 

Document Details

Author: Joint ACI-ASCE Committee 423

Publication Year: 2021

Pages: 18

ISBN: 9781641951630

Formats: Protected PDF/Web View

Table of Contents

CHAPTER 1—INTRODUCTION, p. 2

1.1—Introduction, p. 2

1.2—Scope, p. 2

1.3—Limitations, p. 2

CHAPTER 2—DEFINITIONS, p. 3

CHAPTER 3—REVIEW OF CURRENT PRACTICE, p. 3

3.1—General, p. 3

3.2—Grouting requirements, p. 3

3.3—Tendon protection requirements, p. 4

CHAPTER 4—GROUTED TENDONS, p. 5

4.1—Evolution of grouted tendons, p. 5

4.2—Types of grouted tendons, p. 5

4.3—Potential problem areas, p. 5

4.4—Duct, p. 7

4.5—Grout, p. 8

4.6—Strand and bar, p. 9

4.7—Anchorage hardware and protection, p. 9

CHAPTER 5—EVALUATING CORROSION DAMAGE, p. 9

5.1—General, p. 9

5.2—Monitoring, p. 10

5.3—Nondestructive methods, p. 10

5.4—Exploratory methods, p. 11

CHAPTER 6—REPAIR SCHEMES AND METHODS, p. 11

6.1—General, p. 11

6.2—Grouting of voids, p. 11

6.3—Repair of tendons with soft grout, p. 11

6.4—Tendon repair and strengthening, p. 11

6.5—Other repair and protection strategies, p. 12

CHAPTER 7—REFERENCES, p. 12

Authored documents, p. 12

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