Experimental investigation on seismic behavior of corroded RC columns under artificial climate environment and electrochemical chloride extraction: A comparative study

Dai, Kuang-Yu; Liu, Chang; Lü, Dagang; Yu, Xiaohui

doi:10.1016/j.conbuildmat.2020.118014

Cited by 57 publications

(5 citation statements)

References 52 publications

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“…Fig 19. illustrates the flexural bearing capacity degradation of corroded beams under accelerated uniform and non-uniform corrosion in this study.…”

mentioning

confidence: 87%

“…This is, however, quite different from the corrosion patterns induced by the natural environment [17,18]. Instead, for the artificial climate exposure method, it has been experimentally evidenced to reproduce the corrosion patterns more realistically [19]. In practice, to implement this method, a multi-functional environmental chamber is generally needed and more time is required in comparison with the galvanic method [20].…”

Section: Introductionmentioning

confidence: 99%

“…Fig 19. Degradation model of flexural capacity versus the corrosion degree of tensile reinforcement for RC beams.…”

mentioning

confidence: 99%

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Flexural performance of reinforced concrete beams subjected to accelerated non-uniform corrosion

Huang,

Yu,

Cao

et al. 2024

Mater Struct

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In this study, a modified accelerated corrosion method based on the traditional galvanic method was adopted to generate non-uniform corrosion of reinforcement. The flexural performance of corroded RC beams was experimentally investigated, aiming to study the influence of longitudinal reinforcements corrosion induced by two different accelerated corrosion methods on the degradation of flexural capacity of RC beams. The corrosion-induced and load-induced cracking behaviors, as well as the degradation of flexural performance of beam specimens corroded by these two different methods were studied. The test results showed that the longitudinal reinforcements subjected to the modified accelerated corrosion method demonstrates a considerably higher circumferential and longitudinal non-uniformity, while the traditional accelerated corrosion method induces a rather uniform corrosion. For the corrosion-induced crack, the non-uniform reinforcement corrosion induced by the modified accelerated corrosion method was closer to the one after exposure to the natural environment. The non-uniformity of corrosion aggravates the propagation of both corrosion-induced and load-induced cracks, leading to the change of flexural failure mode. And the uniform corrosion induced by the traditional accelerated corrosion method underestimates the degradation of shear capacity of RC beam, especially in the cases of corrosion degree no less than 15%.

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“…Fig 19. illustrates the flexural bearing capacity degradation of corroded beams under accelerated uniform and non-uniform corrosion in this study.…”

mentioning

confidence: 87%

Section: Introductionmentioning

confidence: 99%

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Flexural performance of reinforced concrete beams subjected to accelerated non-uniform corrosion

Huang,

Yu,

Cao

et al. 2024

Mater Struct

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“…Dataset 5 consists of 23 corroded beam and 79 corroded column components under cyclic loading [6][7][8][9][38][39][40][41][42][43][44][45][46][47][48][49][50][51][52]. 93 out of the 102 corroded specimens have a corresponding pristine specimen.…”

Section: Experimental Databasementioning

confidence: 99%

Residual Seismic Capacity of Beam-Column Components with Corroded Reinforcement

Opabola

2021

SSRN Journal

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“…This method is mainly utilized in new concrete structures but is limited by the cost of the coating and the possibility of damage during the process. The second method involves removing harmful ions in the structure through electrochemical desalination, which is mainly used for chloride protection of newly formed reinforced concrete structures (Swamy and McHugh 2006;Liang et al 2019;Dai et al 2020). The ions (Cl − and SO 4 2− ) are driven out of the concrete under the influence of an electric field.…”

Section: Introductionmentioning

confidence: 99%

Anti-corrosion Behavior of Al2O3@SiO2 Composite Electrokinetic Nanoparticles on Reinforced Concrete

Pang

Zhao

Ding

et al. 2023

ACT

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Electromigration of electrokinetic nanoparticles in concrete structures is an effective approach to enhancing pore structure and retarding the transportation rate of chloride ions. However, there is limited research on the impact of stable positively charged electrokinetic nanoparticles on the corrosion behavior of reinforced concrete. In this paper, the structure of reinforced concrete was optimized by controllably Al 2 O 3 @SiO 2 composite electrokinetic nanoparticles driven by a direct current electric field, and the influence of synthesis parameters, such as reaction time and temperature, on the modified silica sol was discussed. After 14 days of electromigration, spherical nanoparticles were found at depths of 5 to 10 mm inside the concrete. The porosity of the concrete reduced from 26.2% to 9.9%, with the most desirable pore size decreasing from 96.3 nm to 40.3 nm. After 9 months of dry and wet cycling, the electrokinetic nanoparticle-treated samples demonstrated a higher corrosion potential and a lower corrosion current density. Electromigration of electrokinetic nanoparticles slowed the transportation rate of chloride ions and significantly reduced their content in the concrete. Additionally, the Al2O3@SiO2 layer coating on the steel further enhanced its anti-corrosion ability, effectively inhibiting the corrosion of the reinforcement in concrete.

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Experimental investigation on seismic behavior of corroded RC columns under artificial climate environment and electrochemical chloride extraction: A comparative study

Cited by 57 publications

References 52 publications

Flexural performance of reinforced concrete beams subjected to accelerated non-uniform corrosion

Flexural performance of reinforced concrete beams subjected to accelerated non-uniform corrosion

Residual Seismic Capacity of Beam-Column Components with Corroded Reinforcement

Anti-corrosion Behavior of Al<sub>2</sub>O<sub>3</sub>@SiO<sub>2</sub> Composite Electrokinetic Nanoparticles on Reinforced Concrete

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