ACI 546.2R 2020

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

Published By	Publication Date	Number of Pages
ACI	2020	40

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Category: ACI

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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.

PDF Catalog

PDF Pages	PDF Title
3	TITLE PAGE
4	CHAPTER 1—GENERAL 1.1—Introduction
5	1.2—Scope CHAPTER 2—NOTATION AND DEFINITIONS 2.1—Definitions CHAPTER 3—CAUSES OF DETERIORATION 3.1—Introduction 3.2—Deficient construction practices
6	3.3—Marine organisms 3.4—Chemical attack
7	3.5—Corrosion
8	3.6—Mechanical damage 3.7—Freezing and thawing damage
9	3.8—Salt scaling 3.9—Scour CHAPTER 4—INVESTIGATION AND EVALUATION 4.1—Introduction 4.2—Underwater access technology
10	4.3—Visual inspection
11	4.4—Tactile inspection 4.5—Underwater nondestructive testing of concrete
13	4.6—Sampling and destructive testing 4.7—Evaluation
14	CHAPTER 5—PREPARATION FOR REPAIR 5.1—General 5.2—Excavation and debris removal
15	5.3—Concrete removal 5.4—Surface preparation
16	5.5—Reinforcement preparation 5.6—Concrete anchors
17	CHAPTER 6—FORMWORK 6.1—General 6.2—Rigid forms
19	6.3—Semi-rigid forms
20	6.4—Flexible forms
22	CHAPTER 7—MATERIALS AND METHODS 7.1—General considerations 7.2—Anti-washout admixtures
23	7.3—Preplaced-aggregate concrete
24	7.4—Tremie concrete
25	7.5—Pumped concrete and grout
26	7.6—Freefall through water
27	7.7—Epoxy grouting
28	7.8—Epoxy injection
30	7.9—Gloved-hand placement 7.10—Geomembrane systems
31	7.11—Cathodic protection
32	7.12—Fiber-reinforced polymers CHAPTER 8—INSPECTION OF REPAIRS 8.1—Introduction 8.2—Procedure
33	8.3—Documentation CHAPTER 9—REFERENCES
34	Authored documents