Induced macro-cell corrosion phenomenon in the simulated repaired reinforced concrete patch

Hussain, Raja Rizwan; Wasim, Muhammad; Ishida, Tetsuya

doi:10.1080/14488353.2010.11463957

Cited by 10 publications

(19 citation statements)

References 11 publications

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“…The reason behind this high 20?505 V potential at the middle 0%Cl portion was actually due to the macrocell formation (anodic in nature) at the extreme contaminated portion, 3 Self-compacting concrete macrocell specimen preparation 4 Specimen dimension and chloride content 5 Corrosion current and corrosion potential measurement assembly 6 Corrosion current of 5% chloride contaminated specimen at two ends which also induced a macrocell corrosion potential (cathodic in nature) in the middle no chloride portion. Similarly, in OC specimens, 10 at the extreme ends of the 5% chloride contaminated specimen, 20?62 V was obtained while in the middle 0%Cl portion 20?55 V was obtained as shown in Fig. 9, indicating the formation of same macrocell phenomenon.…”

Section: Half-cell Corrosion Potentialssupporting

confidence: 52%

“…17. 10 This OC specimen showed much higher corrosion current (due to macrocell formation) than normally corroded (due to microcell formation) reinforced concrete for a chloride concentration of 5%. 23 This result indicates that in SCRC specimen, the developed macro is not severe as compared to OC specimen, but the phenomenon of a macrocell formation is still there, which needs to be further investigated with SEM and X-ray diffraction analysis as a scope of future research.…”

Section: Crack Appearance and Propagationmentioning

confidence: 78%

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Comparative study on induced macrocell corrosion phenomenon in repaired ordinary reinforced and self-compacting concrete structures

Wasim

Hussain

2013

Corrosion Engineering, Science and Technology

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This paper aimed at an experimental investigation of the comparative corrosion phenomenon in the reinforcing steel of repaired chloride contaminated self-compacting concrete (SCRC) and ordinary concrete (OC) patches. This research is a continuation of a previous study in which macrocell specimens were prepared with OC having different chloride contaminations simulating the actual patch repair in the construction field. Here, in this research, the same specimens were prepared with SCRC to investigate more deeply the macrocell phenomenon in SCRC, which received limited attention in the past. Four prismatic specimens with two sets of 5 and 3% chloride contaminated SCRC at the two ends were prepared respectively, and the middle portion of these specimens was cast after 24 h with uncontaminated SCRC simulating the actual patch repair in the field. After 1 year of experimental observations of corrosion potentials and corrosion rates, interesting and novel results were obtained in comparison with OC and SCRC specimens.

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Section: Half-cell Corrosion Potentialssupporting

confidence: 52%

Section: Crack Appearance and Propagationmentioning

confidence: 78%

Comparative study on induced macrocell corrosion phenomenon in repaired ordinary reinforced and self-compacting concrete structures

Wasim

Hussain

2013

Corrosion Engineering, Science and Technology

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“…The details of the mixing procedure for LWC are published elsewhere by author [7]. The test specimens of the current research were similar in size and dimension to the previous research [10][11][12], with necessary changings to make current research more reliable and accurate. Same like previous research, in the current research the phenomenon of macro-cell as illustrated in Figure 1, was intended to be investigated in LWC.…”

Section: Civil Engineering Research Journalmentioning

confidence: 85%

“…The middle portion of these specimens was cast after one day with no admixed chloride to replicate the repaired portion in the field conditions so to prevent or minimize the further progress of corrosion. Further, details about the specimens' preparation can be obtained from authors published works [10][11][12].…”

Section: Civil Engineering Research Journalmentioning

confidence: 99%

“…Structural patch repair is the most commonly applied practice in the construction and repair industry though such repairs are found vulnerable [9]. Authors of this paper have previously investigated re-corrosion phenomenon in the repaired concrete patches of the reinforced OC and SSC [10][11][12]. The question whether this phenomenon occurs in LWC and the comparison of corrosion behavior between SCC and LWC are the main objectives of this paper.…”

Section: Introductionmentioning

confidence: 99%

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Re-Corrosion in Simulated Refurbished Patches of Corroded Lightweight Reinforced Concrete Structures

Wasim¹

2018

CERJ

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This paper presents experimental investigation on the corrosion behavior in the repaired corroded patches of self-compacting and lightweight reinforced concrete structures. This research is a continuation of previous studies in which authors observed corrosion in the repaired corroded patches of ordinary concrete (OC) in the form of macro-cell. In the current this phenomenon is investigated in lightweight concrete (LWC) and compared with self-compacting concrete (SSC) by long term experiments. It is reviewed that for modern construction, LWC is gaining attention among civil engineers for ordinary and offshore structures construction due to its lightweight and workability over OC. However, the question whether the corrosion behavior in the normal and repaired patches of LWC is the same like other types of concrete is still remained to be answered. This paper addresses this question and evaluates the performance of the corroded repair patches of LWC structure in highly corrosive environments. Test specimens were prepared with LWC closely simulating field conditions in such a way that their two ends were contaminated with 5% and 3% chloride respectively and the middle portion (simulated repaired patch) was cast after one day with LWC having no chloride in it. After 180 days of electrochemical and physical corrosion measurements of specimens, re-corrosion phenomenon in the repaired patches was observed. This research has practical application and it can be used for developing models for the predictions of service and remaining service of LWC structures in corrosive environments.

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Coupled effect of ambient high relative humidity and varying temperature marine environment on corrosion of reinforced concrete

Alhozaimy

Hussain

Al-Zaid

et al. 2012

Construction and Building Materials

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Induced macro-cell corrosion phenomenon in the simulated repaired reinforced concrete patch

Cited by 10 publications

References 11 publications

Comparative study on induced macrocell corrosion phenomenon in repaired ordinary reinforced and self-compacting concrete structures

Comparative study on induced macrocell corrosion phenomenon in repaired ordinary reinforced and self-compacting concrete structures

Re-Corrosion in Simulated Refurbished Patches of Corroded Lightweight Reinforced Concrete Structures

Coupled effect of ambient high relative humidity and varying temperature marine environment on corrosion of reinforced concrete

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