Corrosion of steel bars embedded in fibre reinforced concrete under chloride attack: State of the art

Berrocal, Carlos Gil; Lundgren, Karin; Löfgren, Ingemar

doi:10.1016/j.cemconres.2015.10.006

Cited by 136 publications

(58 citation statements)

References 49 publications

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“…Some work has been carried out over the past few decades to investigate the chloride transport property of SFRC, and was reviewed in Ref. [7,8]. Overall, present studies found that SFRC had similar or slightly better performance on chloride resistance compared with plain concrete.…”

Section: Introductionmentioning

confidence: 70%

“…As a consequence, there were more chlorides bound with the hydrates and hence retarded the chloride transport process [34]. As reviewed in [8], the effects of steel fibres on the chloride resistance of concrete are still open issues and clearly need further study. Overall, the changes in chloride resistance of concrete due to adding steel fibres are insignificant, no matter the matrixes of concretes are identical or properly adjusted (reducing the amount of gravel as the fibre volume fraction increased) as in this study.…”

Section: Chloride Diffusion Propertiesmentioning

confidence: 99%

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Prediction of Chloride Ingress in Steel Fibre Reinforced Concrete Under Bending Load

Wang¹,

Sun²,

Guo³

et al. 2017

Ceramics - Silikaty

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Section: Introductionmentioning

confidence: 70%

Section: Chloride Diffusion Propertiesmentioning

confidence: 99%

Prediction of Chloride Ingress in Steel Fibre Reinforced Concrete Under Bending Load

Wang¹,

Sun²,

Guo³

et al. 2017

Ceramics - Silikaty

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“…While carbonation implies a gas that needs the pore network partially empty (Pacheco, 2015). Many strategies were used to decreases the risk of concrete corrosion (Paul and Van Zijl, 2017;Zhao et al, 2017) such as using additives to the concrete mix (Goyal et al, 2018;Bamforth, 2004), coating the steel rebar and others (Bamforth, 2004;Broomfield, 2006;Berrocal et al, 2016;Osial and Wilinski, 2016).…”

Section: Introductionmentioning

confidence: 99%

Study the Effect of SiO₂ Nanoparticles as Additive on Corrosion Protection of Steel Rebar in Artificial Concrete Solution

Khudhair¹,

Al-Sammarraie²

2020

J. Eng. Appl. Sci.

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It well known the advantages of using SiO 2 nanoparticles as additive for improving the mechanical properties of concrete structure and reducing the liberation of CO 2 gas to the atmosphere. This research investigate the effect of adding SiO 2 nanoparticles (12 nm; 1, 3 and 5% by weight) to artificial concrete solution (2gCa (OH) 2 , 0.0225 g KOH and 0.008 g NaOH in one litter of distilled water) on the corrosion of steel rebar against seawater environment (3.5% NaCl) at four temperatures; 20, 30, 40 and 50°C. The corrosion parameters and pitting probability of the carbon steel rebar were measured in separate experiments using Tafel plot and cyclic polarization procedures, respectively. The corrosion protection efficiency was increased with increasing SiO 2 content and values of 37-80% were recorded in comparison with the concrete solution free of SiO 2 NPs. The cyclic polarization voltagrams show that the SiO 2 NPs reduces the pitting area in all SiO 2 concentrations and fully stopped the pitting problem because of the chloride ions. The surface morphology of the steel rebar was examined before and after polarization using Atomic Force Microscope (AFM).

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“…Steel fibers can reduce the entrance of aggressive agents and the degradation of concrete by controlling cracking at early ages through of shrinkage or temperature gradients and cracking by external loads (Berrocal et al, 2015b). According to Lambrechts (2003) (Angst et al, 2011;Stansbury and Buchanan, 2000).…”

Section: Corrosion In Sfrcmentioning

confidence: 99%

Propiedades mecánicas a flexión del concreto reforzado con fibras de acero bajo ambientes corrosivos

2017

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The influence of two corrosive environments at a short term and the fiber dosage on the flexural performance of steel fiber reinforced concrete, SFRC, is assessed in this paper. The Keywords: SRFC, chloride ion, corrosion initiation, flexural tests, deflection, toughness ResumenEn este artículo se evalúa la influencia de dos ambientes corrosivos a corto plazo, y de la dosificación de fibras sobre el desempeño a flexión del concreto reforzado con fibras de acero, CRFA. El programa experimental comprendió el ensayo de 54 especímenes de concreto reforzado con fibras de acero que tienen relación longitud/diámetro de 65 y dosificaciones de fibras de 30 kg/m 3 y 60 kg/m 3 . En cuanto a los ambientes corrosivos, cilindros y vigas fueron sometidos a la acción de un medio acuoso y un medio de solución NaCl al 3.5%, por un periodo de 60 días. Los resultados fueron comparados con aquellos cilindros y vigas que permanecieron en condiciones inalteradas. Para dicho tiempo de exposición que corresponde a la fase de iniciación de la corrosión, se observó que los iones cloruro presentes en el medio salino (NaCl al 3.5%) ocasionan degradación en el desempeño mecánico del concreto con fibras de acero, por ejemplo, pérdida aproximada del 10% en la resistencia a flexión y disminución del 11% de la tenacidad en flexión. No obstante para la fase de iniciación de la corrosión, la exposición al medio salino provocó un incremento de la capacidad de deflexión del CRFA que puede mejorar su ductilidad y la capacidad de adherencia entre la matriz y las fibras de acero embebidas. Finalmente, se han propuesto ecuaciones que permiten describir el efecto de ambientes acuosos y salinos en la fase de iniciación de la corrosión sobre el CRFA sometido a esfuerzos de flexión.Palabras clave: CRFA, ion cloruro, iniciación de corrosión, ensayos a flexión, deflexión, tenacidad

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Corrosion of steel bars embedded in fibre reinforced concrete under chloride attack: State of the art

Cited by 136 publications

References 49 publications

Prediction of Chloride Ingress in Steel Fibre Reinforced Concrete Under Bending Load

Prediction of Chloride Ingress in Steel Fibre Reinforced Concrete Under Bending Load

Study the Effect of SiO₂ Nanoparticles as Additive on Corrosion Protection of Steel Rebar in Artificial Concrete Solution

Propiedades mecánicas a flexión del concreto reforzado con fibras de acero bajo ambientes corrosivos

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Corrosion of steel bars embedded in fibre reinforced concrete under chloride attack: State of the art

Cited by 136 publications

References 49 publications

Prediction of Chloride Ingress in Steel Fibre Reinforced Concrete Under Bending Load

Prediction of Chloride Ingress in Steel Fibre Reinforced Concrete Under Bending Load

Study the Effect of SiO2 Nanoparticles as Additive on Corrosion Protection of Steel Rebar in Artificial Concrete Solution

Propiedades mecánicas a flexión del concreto reforzado con fibras de acero bajo ambientes corrosivos

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Study the Effect of SiO₂ Nanoparticles as Additive on Corrosion Protection of Steel Rebar in Artificial Concrete Solution