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Steel Corrosion-Induced Concrete Cracking

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Descripción

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.


Características

  • ISBN: 9780128091975
  • Páginas: 204
  • Tamaño: 17x24
  • Edición:
  • Idioma: Inglés
  • Año: 2016

Disponibilidad: 3 a 7 Días

Contenido Steel Corrosion-Induced Concrete Cracking

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.

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.

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.


Steel Corrosion-Induced Concrete Cracking, 1st Edition

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   3 - uniform coefficient of the rust layer
   7.5.2 ?1 - non-uniform coefficient of the rust layer
   7.5.3 ?2 - 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

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