Physical and Chemical Changes of Mortar Induced by Repeated Electrochemical Chloride Extraction

Chheang, Vuthy; Nguyen, Thi Hai Yen; Yokota, Hiroshi; Hashimoto, Katsufumi

doi:10.14250/cement.69.403

Cited by 1 publication

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References 11 publications

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“…After a certain point an increase in charge passed does not increase the removal rate, thus it is plausible to state that part of the chlorides present in concrete cannot be extracted by any circumstance under the electrochemical removal irrespective of the initial dosage level, which will be discussed in further details on the next section. Another visible trend is that for higher initial contamination levels same removal rates can be achieved at lower current densities, Cheang et al stated confirming what, because higher initial chloride contents implicate higher free chloride proportions [57].…”

Section: Influence Of Charge Passed On Chloride Removalmentioning

confidence: 84%

A State-of-the-Art Review of Electrochemical Chloride Extraction for Concrete Structures

Lima¹

2023

OJCE

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Electrochemical chloride extraction is a promising technique for the rehabilitation of concrete structures under chloride induced corrosion. This study consists of an extensive literature review of this treatment including application cases. It is found that the rate of chlorides removed is affected by the total charge passed, whereas increasing charge in a range between 1500 to 2000 Ah/m 2 increases the amount of chlorides removed and this can be more effective by increasing current density instead of duration of treatment. Bound chlorides are extracted during treatment and, water works better than Ca(OH) 2 as an electrolyte, possibly due to modifications on the concrete pore structure. Moreover, ECE is not efficient in repassivate structures but is efficient in its purpose of removing chlorides if treatment setup is well planned, which justifies the need for better international standards on the topic.

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Section: Influence Of Charge Passed On Chloride Removalmentioning

confidence: 84%

A State-of-the-Art Review of Electrochemical Chloride Extraction for Concrete Structures

Lima¹

2023

OJCE

View full text Add to dashboard Cite

show abstract

Physical and Chemical Changes of Mortar Induced by Repeated Electrochemical Chloride Extraction

Cited by 1 publication

References 11 publications

A State-of-the-Art Review of Electrochemical Chloride Extraction for Concrete Structures

A State-of-the-Art Review of Electrochemical Chloride Extraction for Concrete Structures

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