ACI PRC-228.4-23: Visual Condition Survey of Concrete—Guide

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Description

This guide provides guidance on planning, performing, and documenting visual condition surveys of concrete structures. Chapter 1 defines the objective and scope of this guide and Chapter 2 covers terminology. Chapter 3 includes the process and tools one would use to plan and conduct a condition survey. Chapter 4 provides an image library and associated descriptions of the visual features that may be encountered when conducting the survey. Chapters 5 through Chapter 7 discuss the likely causes of the various features one might see when performing a visual condition survey.

Keywords:

condition survey; construction defects; cracking; deterioration; durability-related distress; surface features; survey documentation; visual survey.

 

Document Details

Author: ACI Committee 228

Publication Year: 2023

Pages: 29

ISBN: 9781641952408

Formats: Printed Document or Protected PDF/Web View

Table of Contents

CHAPTER 1—INTRODUCTION AND SCOPE, p. 2

1.1—Introduction, p. 2

1.2—Objective and scope, p. 2

CHAPTER 2—DEFINITIONS, p. 2

2.1—Definitions, p. 2

CHAPTER 3—VISUAL CONDITION SURVEY PROCESS, p. 2

3.1—Planning and preparation, p. 3

3.2—Conducting the visual condition survey, p. 3

3.3—Supplemental tools, p. 4

3.4—Documenting and reporting, p. 4

3.5—Limitations to visual surveys, p. 5

CHAPTER 4—DESCRIPTION AND VISUAL LIBRARY OF FEATURES, p. 5

4.1—Crack, p. 5

4.2—Geometric features, p. 7

4.3—Loss of material, p. 7

4.4—Accretion, p. 9

4.5—Staining, p. 9

4.6—Placement features, p. 10

CHAPTER 5—CONSTRUCTION-RELATED DEFECTS, p. 11

5.1—Defects due to improper mixture proportioning and mixing, p. 12

5.2—Defects due to improper placement and consolidation, p. 12

5.3—Defects due to improper finishing, p. 14

5.4—Defects due to delayed or insufficient curing, p. 15

CHAPTER 6—DESIGN AND SERVICE-RELATED DISTRESS CONDITIONS, p. 16

6.1—Distress conditions due to external loading, p. 16

6.2—Distress conditions due to internal moisture, p. 17

6.3—Distress due to temperature gradients, p. 18

CHAPTER 7—DURABILITY-RELATED DISTRESSES, p. 18

7.1—Aggregate reactions, p. 18

7.2—Chemical attack, p. 20

7.3—Corrosion of reinforcing steel, p. 21

7.4—Erosion, p. 22

7.5—Freezing-and-thawing damage, p. 22

7.6—Physical salt attack, p. 23

7.7—Chemical sulfate attack, p. 23

CHAPTER 8—REFERENCES, p. 24

Authored documents, p. 25

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