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Chloride-Induced Corrosion of Steel in Concrete: An ...

Chloride-Induced Corrosion of Steel in Concrete: An Overview on Chloride Diffusion and Prediction of Corrosion Initiation Time Muhammad Umar Khan , 1 Shamsad Ahmad , 1 and Husain Jubran Al-Gahtani 1 1 Civil and Environmental Engineering Department, King Fahd University of Petroleum Minerals, Dhahran 31261, Saudi Arabia

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Chloride‐induced corrosion of steel in concrete Request PDF

Alberto Sagues. In reinforced concrete structures exposed to marine environments, corrosion initiates when the chloride ion concentration at the surface of the embedded steel bar exceeds a ...

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Chloride‐induced corrosion of steel in concrete - Glass ...

07/06/2001  The corrosion of steel reinforcement in concrete structures induced by chloride ion contamination is a major problem. Deterioration starts with the loss of protection provided by the concrete cover as the result of chloride ingress. This is followed by corrosion initiation and then propagation. Recent advances in models of chloride penetration into concrete, based on

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Chloride Induced Corrosion of Reinforcement Steel in Concrete

Chloride Induced Corrosion of Reinforcement Steel in Concrete . Threshold Values and Ion Distributions at the Concrete-Steel Interface . NELSON SILVA . Department of Civil and Environmental Engineering . Division of Building Technology . Chalmers University of Technology . Abstract. The chloride threshold value (C. th), or critical chloride content, is defined as the chloride concentration at ...

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Chloride‐induced corrosion of steel in concrete - Glass ...

07/06/2001  The corrosion of steel reinforcement in concrete structures induced by chloride ion contamination is a major problem. Deterioration starts with the loss of protection provided by the concrete cover as the result of chloride ingress. This is followed by corrosion initiation and then propagation. Recent advances in models of chloride penetration into concrete, based on

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Chloride‐induced corrosion of steel in concrete Request PDF

Alberto Sagues. In reinforced concrete structures exposed to marine environments, corrosion initiates when the chloride ion concentration at the surface of the embedded steel bar exceeds a ...

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Chloride-Induced Corrosion of Steel in Concrete: An ...

@article{Khan2017ChlorideInducedCO, title={Chloride-Induced Corrosion of Steel in Concrete: An Overview on Chloride Diffusion and Prediction of Corrosion Initiation Time}, author={Muhammad Umar Khan and Shamsad Ahmad and H. Al-Gahtani}, journal={International Journal of Corrosion}, year={2017}, volume={2017}, pages={1-9} }

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Chloride-induced corrosion of steel in cracked concrete ...

01/01/2016  Chloride-induced corrosion rate (i corr) prediction models for RC structures in the marine tidal zone that incorporate the influence of crack width (w cr), cover (c) and concrete quality are proposed.Parallel corrosion experiments were carried out for 2¼ years by exposing one half of 210 beam specimens (120 × 130 × 375 mm long) to accelerated laboratory corrosion (cyclic wetting and

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Chloride-Induced Corrosion of Steel Bars in Concrete with ...

01/03/2002  Corrosion of steel bars in concrete with the presence of gaps/voids at the steel-concrete interface is summarized herein based on the accelerated laboratory and several long-term exposure tests. For this, reinforced concrete specimens with a length of 12 cm, width of 23 cm, and height of 28 cm were made. Specially fabricated steel bars were embedded in the specimens to measure the

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(PDF) Effect of chloride-induced corrosion on bond ...

The corrosion of steel strands due to chloride contamination is one of the most common causes for the degradation of prestressed concrete structure. In this study, an experimental study was ...

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Effect of Chloride-Induced Steel Corrosion on Working Life ...

The reinforcing steel embedded in concrete is generally protected against corrosion by the high alkalinity (pH = 12.5 to 13.5) of the concrete pore solution. The structural degradation of concrete structures due to reinforcement’s corrosion has an impact on the safety, serviceability and durability of the structure. The corrosion of reinforcements in the construction of a transport ...

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On the penetration of rust into cement paste at the steel ...

On the penetration of corrosion products from reinforcing steel in to concrete due to chloride-induced corrosion H.S. Wonga *, Y.X. Zhao. b, A.R. Karimi. a, N.R. Buenfeld. a. and W.L. Jin. b . a . Concrete Durability Group, Imperial College London, SW7 2AZ, UK . b College of Civil Engineering Architecture. Zhejiang University. Hangzhou 310027. P. R. China . Abstract Reinforced concretes were ...

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Numerical analysis of concrete degradation due to chloride ...

Numerical analysis of concrete degradation due to chloride-induced steel corrosion Table. 1. Main parameters for numerical simulation. R. is. the gas constant, R=8.314 J/mol.K, T is the concrete temperature, K, T 0 is the temperature at which D 0 is determined. The temperature T at any given point in a concrete specimen can be obtained from the ...

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Salt water and corrosion of reinforced concrete ...

Chloride induced corrosion to reinforcement and other embedded metals is the leading cause of deterioration in concrete. When steel corrodes, the resulting rust occupies a greater volume than the steel. The resultant expansion creates tensile stresses in the concrete, which can eventually cause cracking, delamination, and spalling. Sulphates attack concrete by reacting with hydrated compounds ...

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Chloride-Induced Corrosion of Steel in Concrete: An ...

@article{Khan2017ChlorideInducedCO, title={Chloride-Induced Corrosion of Steel in Concrete: An Overview on Chloride Diffusion and Prediction of Corrosion Initiation Time}, author={Muhammad Umar Khan and Shamsad Ahmad and H. Al-Gahtani}, journal={International Journal of Corrosion}, year={2017}, volume={2017}, pages={1-9} }

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Chloride-induced corrosion of steel in cracked concrete ...

15/01/2016  Chloride-induced corrosion rate (i{sub corr}) prediction models for RC structures in the marine tidal zone that incorporate the influence of crack width (w{sub cr}), cover (c) and concrete quality are proposed. Parallel corrosion experiments were carried out for 2¼ years by exposing one half of

Get Price

Chloride Induced Corrosion of Reinforcement Steel in Concrete

Chloride Induced Corrosion of Reinforcement Steel in Concrete . Threshold Values and Ion Distributions at the Concrete-Steel Interface . NELSON SILVA . Department of Civil and Environmental Engineering . Division of Building Technology . Chalmers University of Technology . Abstract. The chloride threshold value (C. th), or critical chloride content, is defined as the chloride concentration at ...

Get Price

Chloride-Induced Corrosion of Steel Bars in Concrete with ...

01/03/2002  Corrosion of steel bars in concrete with the presence of gaps/voids at the steel-concrete interface is summarized herein based on the accelerated laboratory and several long-term exposure tests. For this, reinforced concrete specimens with a length of 12 cm, width of 23 cm, and height of 28 cm were made. Specially fabricated steel bars were embedded in the specimens to measure the

Get Price

Chloride-induced corrosion of steel bars in concrete with ...

The specimens were exposed to an artificially created chloride-induced corrosion environment. Furthermore, corrosion of steel bars of 23-year, 10-year, and 16-month-old reinforced concrete specimens was also reported to verify the results obtained in the accelerated laboratory investigations. Generally, the presence of gaps/voids at the steel-concrete interface causes the complete loss of ...

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Effect of Chloride-Induced Steel Corrosion on Working Life ...

The reinforcing steel embedded in concrete is generally protected against corrosion by the high alkalinity (pH = 12.5 to 13.5) of the concrete pore solution. The structural degradation of concrete structures due to reinforcement’s corrosion has an impact on the safety, serviceability and durability of the structure. The corrosion of reinforcements in the construction of a transport ...

Get Price

Initiation of chloride‐induced corrosion of steel in ...

21/08/2009  This paper provides a brief review of research aimed at characterising the steel–concrete interfacial zone (SCIZ) and its influence on the susceptibility of the metal to pitting corrosion when concrete is exposed to environments that cause ingress of chloride ions accompanied by leaching of hydroxyl ions. For reinforced concrete made from Portland cements, exposed to aqueous solutions of ...

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Numerical analysis of concrete degradation due to chloride ...

Numerical analysis of concrete degradation due to chloride-induced steel corrosion Table. 1. Main parameters for numerical simulation. R. is. the gas constant, R=8.314 J/mol.K, T is the concrete temperature, K, T 0 is the temperature at which D 0 is determined. The temperature T at any given point in a concrete specimen can be obtained from the ...

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Salt water and corrosion of reinforced concrete ...

Chloride induced corrosion to reinforcement and other embedded metals is the leading cause of deterioration in concrete. When steel corrodes, the resulting rust occupies a greater volume than the steel. The resultant expansion creates tensile stresses in the concrete, which can eventually cause cracking, delamination, and spalling. Sulphates attack concrete by reacting with hydrated compounds ...

Get Price

Mechanism of Chloride Induced Corrosion (Pitting Corrosion ...

05/02/2017  Concrete is an alkaline material, having a pore solution of pH ranging between 12-13. The high alkalinity exists due to hydration of cement releasing sodium hydroxide (NaOH) and potassium hydroxide (KOH) in a saturated calcium hydroxide solution (Ca(OH)2). This alkalinity provides the steel with a high degree of protection against corrosion by forming a passive layer on its surface. This layer ...

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