Steel Corrosion-Induced Concrete Cracking - 1st Edition - ISBN: 9780128091975, 9780128092101

Steel Corrosion-Induced Concrete Cracking

1st Edition

Authors: Yuxi Zhao Weiliang Jin
eBook ISBN: 9780128092101
Paperback ISBN: 9780128091975
Imprint: Butterworth-Heinemann
Published Date: 10th March 2016
Page Count: 204
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Description

Steel Corrosion Induced Concrete Cracking presents the latest advances in the origin, mechanism and development of corrosion-induced cracking in concrete. It investigates topics including expansion coefficient and elastic modulus of steel corrosion, rust layer and rust distribution, spatial distribution of corrosion products, the shape of corrosion-induced cracks and so on.

This book concludes by proposing an improved corrosion-induced cracking model, which considers the phenomena of the simultaneous occurrence of corrosion layer accumulation and corrosion filling in concrete.

This book will be a valuable reference book for researchers and graduate students in the field of concrete durability and concrete structure, and industry engineers who are concerned with the deterioration mechanisms and the life cycle of reinforced concrete structures.

Key Features

  • Proposes a new corrosion-induced concrete cracking model, which takes into account the phenomenon of the simultaneous occurrence of corrosion layer accumulation and corrosion filling paste.
  • Investigates the parameters and values of expansion coefficients and elastic modulus of steel corrosion, which enables a more rational prediction of concrete surface cracking
  • Introduces the use of the Gaussian function to describe the non-uniform spatial distribution of corrosion products.

Readership

Researchers and graduate students in the field of concrete durability and concrete structure; industry engineers who are concerned with the deterioration mechanisms and the life cycle of reinforced concrete structures.

Table of Contents

Preface
Chapter 1. Introduction
1.1 Background
1.2 Empirical models
1.2.1 Critical steel corrosion at surface cracking
1.2.2 Crack width at the concrete surface
1.2.3 Discussion on the empirical models
1.3 Analytical models
1.3.1 Three-stage corrosion-induced cracking model
1.3.2 Corrosion filling stage
1.3.3 Concrete cover stressing and cracking
1.3.4 Rust filling in corrosion-induced cracks
1.4 Contents of this book
References

Chapter 2. Steel corrosion in concrete
2.1 Introduction
2.2 Mechanisms of steel corrosion in concrete
2.2.1 Corrosion process
2.2.2 Corrosion rate
2.2.3 Passivation
2.3 Steel corrosion induced by carbonation or chloride attack
2.3.1 Carbonation-induced corrosion
2.3.2 Chloride-induced corrosion
2.4 Corrosion products
2.5 Steel corrosion-induced concrete damage
2.6 Conclusions
References

Chapter 3. Expansion coefficients and modulus of steel corrosion
3.1 Introduction
3.2 Expansion coefficient of steel corrosion
3.2.1 Experimental program
3.2.2 Tested results
3.2.3 Composition of rust samples
3.2.4 Expansion coefficient of rust samples
3.3 Modulus of steel corrosion in concrete
3.3.1 Experimental program
3.3.2 Loading and unloading stress-strain curve
3.3.3 Tested date of cyclic low-compression test
3.3.4 Modulus of rust
3.4 Conclusions
References

Chapter 4. Damage analysis and cracking model of reinforced concrete structures with rebar corrosion
4.1 Introduction
4.2 Basic concrete cracking model due to steel corrosion
4.3 Corrosion-induced cracking process
4.3 Non-cracking stage of corrosion-induced concrete cracking process
4.4 Partial cracking stage of corrosion-induced concrete cracking process
4.4.1 Intact part
4.4.2 Cracked part
4.5 Discussion on corrosion-induced expansive pressure
4.5.1 Relation between expansive pressure and steel corrosion
4.5.2 Variation of expansive pressure
4.5.3 Effect of concrete cover thickness
4.5.4 Effect of steel bar diameter
4.5.5 Effect of concrete quality
4.6 Discussion on the radial loss of steel bar
4.6.1 Steel loss varying with the crack length
4.6.2 Steel loss at surface cracking
4.6.3 Effect of concrete cover thickness
4.6.4 Effect of steel bar diameter
4.6.5 Effect of rust expansion coefficient
4.6.6 Effect of concrete quality
4.7 Conclusions
References

Chapter 5. Critical thickness of rust layer at concrete surface cracking
5.1 Introduction
5.2 Experimental program
5.2.1 Reinforced concrete specimens
5.2.2 Accelerated steel corrosion
5.2.3 Sample preparation
5.2.4 Observation and measurement
5.3 Rust distributions in the cracking sample
5.4 Millscale
5.5 Corrosion layer thickness at surface cracking of concrete cover
5.5.1 At outer surface cracking
5.5.2 At inner surface cracking
5.6 Conclusions
References

Chapter 6. Rust distribution in corrosion-induced cracking concrete
6.1 Introduction
6.2 Experimental program
6.2.1 Reinforced concrete specimen
6.2.2 Curing and exposure history
6.2.3 Sample preparation
6.2.4 Observation and measurements
6.3 Rust distributions at the Steel/concrete interfaces
6.4 Distribution of the corrosion-filled paste (CP)
6.5 Rust distribution in corrosion-induced cracks
6.5.1 Rust distribution in cracks by digital microscope
6.5.2 Rust filling in cracks by SEM
6.5.3 Discussion of rust filling corrosion-induced cracks
6.6 Crack propagation and rust development
6.6.1 Crack propagation
6.6.2 Rust development
6.7 Conclusions
References

Chapter 7. Non-uniform distribution of rust layer around steel bar in concrete
7.1 Introduction
7.2 Steel corrosion and corrosion-induced cracks
7.3 Gaussian model to describe the non-uniform rust layer
7.4 Comparing the proposed Gaussian model with other models
7.5 Parameters in Gaussian model
7.5.1 λ3 - uniform coefficient of the rust layer
7.5.2 λ1 - non-uniform coefficient of the rust layer
7.5.3 λ2 - spread coefficient of rust layer
7.5.4 Relationships among parameters before concrete surface cracking
7.6 Conclusions
References

Chapter 8. Crack shape in corrosion-induced cracking concrete cover
8.1 Introduction
8.2 Experimental Program
8.2.1 Reinforced concrete specimens
8.2.2 Accelerated corrosion history
8.2.3 Sample preparation
8.2.4 Observation and measurement
8.3 Crack shape
8.3.1 Crack width model
8.3.2 a1 - Crack width variation coefficient
8.3.3 a2 - Crack width coefficient at the surface of the steel bar
8.4 Crack width and corrosion layer thickness
8.4.1 Relationship between crack width Wi and corrosion layer thickness TCL
8.4.2 Wc - Critical crack width at concrete outer surface cracking
8.4.3 Ws - Crack width on the surface of concrete cover
8.5 Relationship of corrosion layer thickness TCL and crack width variation coefficient a1
8.6 Crack shape in different type of concrete
8.7 Conclusions
References

Chapter 9. Development of the corrosion-filled paste at the steel/concrete interface
9.1 Introduction
9.2 Influence of cracks on CP thickness
9.3 Relation between TCP and TCL- excluding the effect of inner cracks
9.4 Relation between TCP and TCL- including the inner cracks
9.5 Conclusions
References

Chapter 10. Corrosion-induced concrete cracking model considering corrosion-filled paste
10.1 Introduction
10.2 Corrosion-induced concrete surface cracking model considering CP
10.2.1 Cracking process description
10.2.2 TCP - TCL model
10.2.3 Nominal ratio between the corrosion products volume and the basic steel volume
10.2.4 Model verification
10.3 Time from corrosion initiation to concrete surface cracking
10.3.1 Faraday’s Law
10.3.2 Corrosion rate
10.4 Discussion of non-uniform corrosion situation
10.5 Discussion of influence of loading on cracking model
10.5.1 Force contributed by the mechanical interlocking
10.5.2 Intersecting cracks and localized corrosion
10.6 Conclusions
References
Notations
Index


 

Details

No. of pages:
204
Language:
English
Copyright:
© Butterworth-Heinemann 2016
Published:
Imprint:
Butterworth-Heinemann
eBook ISBN:
9780128092101
Paperback ISBN:
9780128091975

About the Author

Yuxi Zhao

Academic visitor to Imperial College London from 2006 till 2008.Her research interest is on durability of concrete structure and corrosion-induced concrete cracking. Prof. Zhao is a member of China Concrete Society and Asia Concrete Federal. She has been awarded 15 research grants by the Chinese government, and has published more than 50 papers, co-authored 2 books and co-edited 3 conference proceedings. She was also awarded the National Award for Science and Technology Progress in 2008 and the Science & Technology Award of Zhejiang Province in 2006.

Affiliations and Expertise

Professor of Concrete Structures, Zhejiang University, China

Weiliang Jin

Fellow of the Institute of Civil Engineers (ICE) and an honorary professor in Queen's University, UK. His research interest includes structural reliability, durability of reinforced concrete structure, health monitoring of concrete structures, and fundamental theories of concrete structures and their applications. He founded the group on Durability of Concrete Structures in 1995 at Zhejiang University, which carries out research on the durability problems regarding environments, materials, concrete components and structures. He has been awarded 20 research grants by the Chinese government and has published more than 200 articles, co-authored 9 monographs. He also won 3 National Awards for Science and Technology Progress and 5 Science & Technology Awards of Zhejiang Province. Prof. Jin previously held research fellowships from the Alexander von Humboldt Foundation and the Norwegian Council of Research.

Affiliations and Expertise

Professor of Concrete Structures, Zhejiang University, China