Simple Technique for Tracking Chloride Penetration in Concrete Based on the Crack Shape and Width under Steady-State Conditions

Yang, Keun–Hyeok; Singh, Jitendra Kumar; Lee, Bang Yeon; Kwon, Seung-Jun

doi:10.3390/su9020282

Cited by 9 publications

(4 citation statements)

References 22 publications

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“…TPP curves can be obtained by monitoring the potential used steady fixed levels of current at specific potential. In TPP curves, the current density I (A/cm 2 …”

Section: Corrosion Density Test For Bar Based On Electrochemical Measmentioning

confidence: 99%

“…Besides, in the process of bridge reinforcement, environmental problems including noise pollution, dust pollution and consumption of natural resources will occur. Meanwhile, the corrosion of rebar in concrete is crucial to the durability of RC structures, especially in chloride aggressive environments [1,2]. Rebar in concrete are not prone to corrosion within a short time in sound concrete due to the high and stable alkalinity of concrete pore solution.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Crack on Durability of RC Material under the Chloride Aggressive Environment

et al. 2018

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Exposed to aggressive environments, the rebar in reinforced concrete (RC) bridges will be corroded gradually. Durability of RC material mostly depends on the rebar corrosion behavior. In this research, influences of crack on rebar corrosion were investigated. Firstly, RC specimens with different crack number, width and spacing were prepared and the rebar corrosion was conducted through an accelerated chloride penetration method. Then, corrosion current densities of rebar were calculated from electrochemical test methods including liner polarization (LP), Tafel potentiodynamic polarization (TPP) and electrochemical impedance spectroscopy (EIS) measurements. Finally, the discussion was presented about a more reasonable electrochemical testing method for rebar corrosion in RC material. Besides, the significant influence factor among crack width, number and spacing was evaluated based on both One-way analysis of variance (One-way ANOVA) and Turkey's honest significant difference (Turkey's HSD) test. The results revealed that a more reasonable way to obtain corrosion current densities of rebar is combining EIS measurement with TPP measurement. Crack number shows the most significant effect on corrosion behavior of rebar, while crack spacing possesses the least one.

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“…TPP curves can be obtained by monitoring the potential used steady fixed levels of current at specific potential. In TPP curves, the current density I (A/cm 2 …”

Section: Corrosion Density Test For Bar Based On Electrochemical Measmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of Crack on Durability of RC Material under the Chloride Aggressive Environment

et al. 2018

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“…Although there are several mechanisms that may degrade concrete in severe environments, experience demonstrates that the most critical threat to concrete structures exposed to marine environments is chloride-induced corrosion of the reinforcing steel bars [3][4][5]. Research has been carried out on this specific mechanism for many years [6][7][8][9], leading to the development of different preventive measures to increase resistance to corrosion from the beginning of the structure life cycle, thus resulting in less maintenance-demanding solutions.…”

Section: Introductionmentioning

confidence: 99%

Life Cycle Cost Assessment of Preventive Strategies Applied to Prestressed Concrete Bridges Exposed to Chlorides

2018

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This paper applies Life Cycle Assessment methodology to aid in the decision making to select the preventive measure against chloride corrosion in concrete structures that works best for the socioeconomic context of the structure. The assumed model combines the concepts of Life Cycle Cost Analysis and Social Life Cycle Analysis to assess the impacts on users derived from the maintenance activities associated with each alternative analyzed in terms of economic costs. The model has been applied to a prestressed concrete bridge to obtain a preventive measure that can reduce the total costs incurred over the period of analysis by up to 58.5% compared to the cost of the current solution.

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“…Owing to the change in climatic conditions and the presence of aggressive ions in the atmosphere, reinforced concrete (RC) deteriorates quickly [7,8]. The carbonation of concrete is a major detrimental factor for RC structures [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Carbonation-Induced Corrosion Initiation Probability of Rebars in Concrete With/Without Finishing Materials

Lee

Min

et al. 2018

Sustainability

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The carbonation of concrete is the prime deterioration factor in reinforced concrete (RC) structures. During carbonation, the atmospheric CO2 penetrates the concrete and lowers its alkalinity. The problem in predicting carbonation is difficult to address, and a reliable probabilistic carbonation assessment is required to consider different variables such as the concrete quality, the chemistry of the reinforcing steel, and the quality of finishing materials. In the present study, we have used different finishing materials on concrete to minimize the effects of carbonation with a field survey and accelerated conditions. In one experiment, the measurement of the thickness of the concrete cover and the application of the finishing materials were done on-site, whereas, in the other experiment, these were done under accelerated conditions. The carbonation depth and the coefficient of silk wallpaper (SWP) were reduced by half in an accelerated 5% CO2 experiment compared to the plain ordinary Portland cement (OPC), owing to the external physical barrier that reduces the penetration of CO2 through the pores of the concrete. We found that carbonation did not reach the embedded rebar even after 100 years when SWP finishing material was used. The probability model predicted that 51 years would be required for OPC and water paint (WP) to reach a 30% onset of corrosion initiation through accelerated carbonation, while SWP would require 200 years.

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Simple Technique for Tracking Chloride Penetration in Concrete Based on the Crack Shape and Width under Steady-State Conditions

Cited by 9 publications

References 22 publications

Effect of Crack on Durability of RC Material under the Chloride Aggressive Environment

Effect of Crack on Durability of RC Material under the Chloride Aggressive Environment

Life Cycle Cost Assessment of Preventive Strategies Applied to Prestressed Concrete Bridges Exposed to Chlorides

Carbonation-Induced Corrosion Initiation Probability of Rebars in Concrete With/Without Finishing Materials

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