ACI 207.6R 17:2017 Edition

$29.52

207.6R-17 Report on the Erosion of Concrete in Hydraulic Structures

Published By	Publication Date	Number of Pages
ACI	2017	32

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Description

This report outlines the causes, control, maintenance, and repair of erosion in hydraulic structures. Such erosion occurs from three major causes: cavitation, abrasion, and chemical attack. Design parameters, materials selection and quality, environmental factors, and other issues affecting the performance of concrete are discussed. Evidence exists to suggest that, given the operating characteristics and conditions to which a hydraulic structure will be subjected, the concrete can be designed to mitigate future erosion. However, when operational factors change or are not clearly known and erosion of concrete surfaces occurs, repairs should follow. This report addresses the subject of concrete erosion, inspection techniques, and repair strategies, providing references to a more detailed treatment of the subject.

PDF Catalog

PDF Pages	PDF Title
3	TITLE PAGE
4	CHAPTER 1—INTRODUCTION AND SCOPE 1.1—Introduction 1.2—Scope CHAPTER 2—NOTATION 2.1—Notation
5	CHAPTER 3—EROSION BY CAVITATION 3.1—Mechanism of cavitation 3.2—Cavitation index
6	3.3—Cavitation damage
8	CHAPTER 4—EROSION BY ABRASION 4.1—General 4.2—Stilling basin damage
9	4.3—Power plant tailrace damage
10	4.4—Navigation lock damage 4.5—Tunnel lining damage 4.6—Hydraulic jacking
11	CHAPTER 5—EROSION BY CHEMICAL ATTACK 5.1—Sources of external chemical attack 5.2—Erosion by mineral-free water 5.3—Erosion by miscellaneous causes
12	CHAPTER 6—CONTROL OF CAVITATION EROSION 6.1—Hydraulic design principles Example 1
13	6.2—Cavitation indexes for damage and construction tolerances Example 2
14	6.3—Using aeration to control damage
15	6.4—Materials
16	6.5—Materials testing 6.6—Construction practices
17	CHAPTER 7—CONTROL OF ABRASION EROSION 7.1—Hydraulic considerations
18	7.2—Materials evaluation 7.3—Materials
19	CHAPTER 8—CONTROL OF EROSION BY CHEMICAL ATTACK 8.1—Control of erosion by mineral-free water
20	8.2—Control of erosion from acid attack due to bacterial action 8.3—Control of erosion by miscellaneous chemical causes
21	CHAPTER 9—PERIODIC INSPECTIONS AND CORRECTIVE ACTION 9.1—General 9.2—Inspection program 9.3—Inspection procedures 9.4—Reporting and evaluation
22	CHAPTER 10—REPAIR METHODS AND MATERIALS 10.1—Design considerations 10.2—Methods and materials
24	CHAPTER 11—REFERENCES
25	Authored documents