Influence of cementitious binder on chloride removal under electrochemical treatment in concrete

Kim, Ki Beom; Hwang, Jun Seong; Ann, Ki Yong

doi:10.1016/j.conbuildmat.2015.12.052

Cited by 28 publications

(21 citation statements)

References 11 publications

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“…Kim et al [84] found that an increase in the total charge resulted in a decrease in the chloride concentration around the steel rebar (i.e., at a depth of 27-30 mm) for current densities that varied from 0.25 to 0.75 A/m² RS and were applied for 28 days, whatever the binder concerned.…”

Section: Efficacy Of Ecementioning

confidence: 99%

The application of electrochemical chloride extraction to reinforced concrete – A review

Bouteiller

Tissier

Marie-Victoire

et al. 2022

Construction and Building Materials

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Section: Efficacy Of Ecementioning

confidence: 99%

The application of electrochemical chloride extraction to reinforced concrete – A review

Bouteiller

Tissier

Marie-Victoire

et al. 2022

Construction and Building Materials

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“…The reaction represented by Equation 9 can be suppressed by keeping the electrolyte's PH (power of hydrogen value) above approximately 9 [14].…”

Section: Theory Of Electrochemical Chloride Extractionmentioning

confidence: 99%

“…At the same time, hydroxyl ions are produced around the reinforcement by electrolysis as shown in Eqs. (13,14)…”

Section: System Of Electrochemical Chloride Extraction (Ece)mentioning

confidence: 99%

Chloride Extraction from Portland Cement Concrete: A Review

Elaty

Taman²,

Mohamed³

2022

International Journal of Advances in Structural and Geotechnica

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Several concrete structures are suffering from chloride attack which causes corrosion of the reinforcements. The chloride attack may be due to the presence of chloride in the constituents materials used in manufacturing reinforced concrete. In the common Patrice, such reinforced concrete structures to be either repaired or replaced and the later is the most common one when chloride content is being high which means much loss for the economy. Several studies have been conducted to investigate the ability of removing the chloride for the contaminated reinforced concrete. This process can prolong the expected life time of the contaminated reinforced concrete structures. This paper is focusing on reviewing the electrochemical chloride extraction (ECE) as an important key to enhance the durability of reinforced concrete structures. The influence of various factors on chloride removal efficiency are reviewed and presented. Various factors including, time of extraction, current density, ratio of cover thickness and side length, initial chloride ion concentration, ratio of cross-sectional area of reinforcement to crosssectional area of specimen, type of the used electrolyte, type of the used cathode and concrete composition as well as its characteristics are reviewed. Moreover, the advantages, the expected drawbacks, the challenges as well as the expected future of the ECE are reviewed and highlighted.

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“…e chloride extraction rate is mostly measured considering the total concentration of ions in the bulk concrete, rather than chloride profiles at different depths of the cover concrete, although profiles may provide more direct and clear information on modified concentrations under electric charge, considering the penetration depths [20,[22][23][24][25]. Various externalities can easily influence the treatment, such as the environmental temperature during treatment [26], a high concrete resistance on site which decreases the efficiency of current passed, insufficient coverage of the anode, and arrangement of stirrups and steel rebars [19,27,28].…”

Section: Introductionmentioning

confidence: 99%

Efficiency of Different Electrolytes on Electrochemical Chloride Extraction to Recover Concrete Structures under Chloride‐Induced Corrosion

Lima

Ann

2020

Advances in Materials Science and Engineering

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Chloride-induced corrosion is one of the main causes of concrete deterioration and imposes a challenge to sustainability. Traditional techniques to repair corroded structures consisted of basically removing the damaged area, which was either economical or sustainable. Therefore, electrochemical chloride extraction (ECE) gained popularity for being an efficient nondestructive treatment applied temporarily to structures. On this line, this manuscript aims to raise the efficiency of ECE by an optimal decision of the treatment setup concerning the electrolyte choice. Three different electrolytes were tested, namely, tap water, calcium hydroxide, and lithium borate. Experimental results pointed to lithium borate as the most efficient electrolyte for extracting chlorides while calcium hydroxide was a better choice to repassivate the structure and even heal cracks, due to a possible electrodeposition of the electrolyte ions on the cement matrix. Thus, depending on the main goal of the treatment, different electrolytes achieve a better performance, which highlights the importance of pretreatment evaluation to see in which stage of corrosion damage is the structure.

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Influence of cementitious binder on chloride removal under electrochemical treatment in concrete

Cited by 28 publications

References 11 publications

The application of electrochemical chloride extraction to reinforced concrete – A review

The application of electrochemical chloride extraction to reinforced concrete – A review

Chloride Extraction from Portland Cement Concrete: A Review

Efficiency of Different Electrolytes on Electrochemical Chloride Extraction to Recover Concrete Structures under Chloride‐Induced Corrosion

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