Comparison of uniform and non-uniform corrosion induced damage in reinforced concrete based on a Gaussian description of the corrosion layer

Zhao, Yongjun; Karimi, Ali Reza; Wong, H.S.; Hu, Bingyan; Buenfeld, N.R.; Jin, Weiliang

doi:10.1016/j.corsci.2011.05.017

Cited by 133 publications

(66 citation statements)

References 24 publications

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“…The thickness of corrosion layer at the concrete surface cracks is regarded <100 mm according to Wong (2010), Zhao and Jin (2006), and Zhao, Karimi et al (2011), which is much smaller than the critical CL thickness when the CP is constant, approximately 300 mm (Zhao et al, 2013). Therefore, the CP thickness did not reach the maximum value before the concrete surface cracked, i.e., it is somewhere in the sideling line in Figure 2.…”

Section: T Cp -T CL Modelmentioning

confidence: 99%

Corrosion-Induced Concrete Cracking Model Considering Corrosion-Filled Paste

Dong¹,

Zhao²,

Wu³

2016

Proceedings of the 5th International Conference on the Durability of Concrete Structures

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A T CP -T CL model is established to describe the relationship between the thickness of the corrosion-filled paste (CP) and that of the corrosion layer (CL). This model can describe the phenomenon that the corrosion filling in the concrete pores and accumulating at the steel/concrete interface occur synchronously. Based on the T CP -T CL model, a corrosion-induced concrete cracking model, which can quantitatively consider corrosion-filled paste at concrete/steel interface, is proposed. Combined with damage analysis in corrosion-induced cracking process of concrete cover, the model is developed to describe the quantity of steel corrosion required to crack the concrete surface.

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Section: T Cp -T CL Modelmentioning

confidence: 99%

Corrosion-Induced Concrete Cracking Model Considering Corrosion-Filled Paste

Dong¹,

Zhao²,

Wu³

2016

Proceedings of the 5th International Conference on the Durability of Concrete Structures

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“…However, in subsequent studies, it was found that the development of corrosion products (rust) is formed non-uniformly along the perimeter of steel reinforcement [11]- [14]. Research conducted by [12] stated that there the rust was accumulated at the certain parts around the perimeter of the reinforcement, particularly in part nearest to the exposed surface of the concrete which dealing with the outside environment.…”

Section: Corrosion Induced Cracking Process In Reinforced Concretementioning

confidence: 99%

“…Furthermore, for the non-uniform corrosion, the expansive pressure was calculated by combining the Gaussian model by Zhao and thick walled cylinder based equation by Liu and Wayers [14], [15]. In Liu and Wayers equation, the expansive pressure is affected by the thickness of the corrosion layer.…”

Section: Fig 8 Rust Distribution At the Crack Tipmentioning

confidence: 99%

Investigation of Non-Uniform Rust Distribution and Its Effects on Corrosion Induced Cracking in Reinforced Concrete

et al. 2017

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Abstract. Uniform corrosion still widely used by a lot of researchers and engineers to analyze the corrosion induced cracking. However, in practice, corrosion process occurred non-uniformly. The part nearest to the exposed surface is more likely to have faster corrosion initiation compared with other regions. This research is mainly focused on investigating the effect of non-uniform rust distribution to cover cracking in reinforced concrete. An experimental test performed using accelerated corrosion test by using 5% NaCl solution and applied a constant electric current to the concrete samples. The rust distribution and measurement were observed by using a digital microscope. Based on the experimental result, it was found that the rust was distributed in a non-uniform pattern. As a result, the cracks also formed non-uniformly along the perimeter of steel bar. At the last part of this paper, a simulation result of concrete cracking induced by non-uniform corrosion is presented. The result compared with a simulation using uniform corrosion assumption to investigate the damage pattern of each model. The simulation result reveals stress evolution due to rust expansion which leads to concrete cracking. Furthermore, a comparison of stresses induced by non-uniform corrosion and uniform corrosion indicates that non-uniform corrosion could lead to earlier damage to the structure which is specified by the formation and propagation of the crack.

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“…[8][9][10][11] studying the mechanism of the reinforcing steel corrosion in concretes, that inhibitors added to the fresh concrete mixtures can effectively defer the initiation phase of corrosion as well as decrease its rate during the propagation phase.…”

Section: Introductionmentioning

confidence: 99%

Preliminary Corrosion Testing of Steel Rebar Samples in 3.5% NaCl Solution with and without a Green Inhibitor

Abdulsada¹,

Törók²,

Fazakas³

2018

Epitoanyag - JSBCM

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SHayMaa abbaSAbstract the applicability of a new organic inhibitor extracted from a cheap organic waste of orange peel (so-called "green" inhibitor) was studied in a laboratory system where the steel rebar samples obtained from a steel mill operating in Hungary were investigated in several sets of experiments to reveal their major corrosion properties in aqueous solutions containing sodium chloride salt. the initial corrosion rates were determined by a standard electrochemical polarisation technique on active (scale and rust free) steel specimen while being immersed in 3.5% nacl aqueous solutions containing the methanol extract of the chosen green inhibitor in a preliminary test run of 24 hours. Due to the inhibitor's active groups identified by Ftir spectroscopy, this new green inhibitor (with concentrations tested at 1 and 3%) showed promising surface adsorptive and corrosion mitigating effects examined also by scanning electron microscopy (sem) combined with eDs surface analysis. these sem-eDs surface analyses were performed on the given rebar samples after an immersion (i.e. corroding) period of one month.

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Comparison of uniform and non-uniform corrosion induced damage in reinforced concrete based on a Gaussian description of the corrosion layer

Cited by 133 publications

References 24 publications

Corrosion-Induced Concrete Cracking Model Considering Corrosion-Filled Paste

Corrosion-Induced Concrete Cracking Model Considering Corrosion-Filled Paste

Investigation of Non-Uniform Rust Distribution and Its Effects on Corrosion Induced Cracking in Reinforced Concrete

Preliminary Corrosion Testing of Steel Rebar Samples in 3.5% NaCl Solution with and without a Green Inhibitor

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