ACI PRC-546.2-20: Guide to Underwater Repair of Concrete

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Description

This document provides guidance on the selection and application of materials and methods for the repair and strengthening of concrete structures under water. An overview of materials and methods for underwater repair is presented as a guide for making a selection for a particular application.

Keywords:

anti-washout; cathodic protection; concrete removal; deterioration; diver; formwork; marine placement; pile-jackets; polymer(s); repair; surface preparation; tremie; underwater.

 

Document Details

Author: ACI Committee 546

Pages: 36

ISBN: 9781641951296

Categories: Formwork, Marine Concrete, Repair

Formats: Protected PDF/Web View

Table of Contents

CHAPTER 1—GENERAL, p. 2

1.1—Introduction, p. 2

1.2—Scope, p. 3

CHAPTER 2—NOTATION AND DEFINITIONS, p. 3

2.1—Definitions, p. 3

CHAPTER 3—CAUSES OF DETERIORATION, p. 3

3.1—Introduction, p. 3

3.2—Deficient construction practices, p. 3

3.3—Marine organisms, p. 4

3.4—Chemical attack, p. 4

3.5—Corrosion, p. 5

3.6—Mechanical damage, p. 6

3.7—Freezing and thawing damage, p. 6

3.8—Salt scaling, p. 7

3.9—Scour, p. 7

CHAPTER 4—INVESTIGATION AND EVALUATION, p. 7

4.1—Introduction, p. 7

4.2—Underwater access technology, p. 7

4.3—Visual inspection, p. 8

4.4—Tactile inspection, p. 9

4.5—Underwater nondestructive testing of concrete, p. 9

4.6—Sampling and destructive testing, p. 11

4.7—Evaluation, p. 11

CHAPTER 5—PREPARATION FOR REPAIR, p. 12

5.1—General, p. 12

5.2—Excavation and debris removal, p. 12

5.3—Concrete removal, p. 13

5.4—Surface preparation, p. 13

5.5—Reinforcement preparation, p. 14

5.6—Concrete anchors, p. 14

CHAPTER 6—FORMWORK, p. 15

6.1—General, p. 15

6.2—Rigid forms, p. 15

6.3—Semi-rigid forms, p. 17

6.4—Flexible forms, p. 18

CHAPTER 7—MATERIALS AND METHODS, p. 20

7.1—General considerations, p. 20

7.2—Anti-washout admixtures, p. 20

7.3—Preplaced-aggregate concrete, p. 21

7.4—Tremie concrete, p. 22

7.5—Pumped concrete and grout, p. 23

7.6—Freefall through water, p. 24

7.7—Epoxy grouting, p. 25

7.8—Epoxy injection, p. 26

7.9—Gloved-hand placement, p. 28

7.10—Geomembrane systems, p. 28

7.11—Cathodic protection, p. 29

7.12—Fiber-reinforced polymers, p. 30

CHAPTER 8—INSPECTION OF REPAIRS, p. 30

8.1—Introduction, p. 30

8.2—Procedure, p. 30

8.3—Documentation, p. 31

CHAPTER 9—REFERENCES, p. 31

Authored documents, p. 32

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