Crack closure of reinforced concrete by electrodeposition technique

Ryu, Jaeho; Otsuki, Nobuaki

doi:10.1016/s0008-8846(01)00650-0

Cited by 90 publications

(44 citation statements)

References 1 publication

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“…It takes advantage of the character of RC and water environment condition, puts a weak direct current between rebar in RC structures and an external electrode (an anode) and produces electrodeposits around rebar in RC, which will form a barrier coating of inorganic insoluble compounds such as ZnO, CaCO 3 and Mg(OH) 2 , etc in cracks and surfaces, fill cracks and seal surfaces of RC. In recent years, several studies [7,[10][11][12][13][14] are reported on the topic about its feasibility, mechanism and experimental control of rehabilitation of cracks in RC using electrodeposition method.…”

Section: Introductionmentioning

confidence: 99%

Healing effectiveness of cracks rehabilitation in reinforced concrete using electrodeposition method

Jiang

Xing

Sun

et al. 2008

J. Wuhan Univ. Technol.-Mat. Sci. Edit.

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An electrodeposition method and its experimental device for rehabilitation of cracks in reinforced concrete were proposed. Porous concrete is proposed to simulate cracked concrete, and mass increment, permeation coefficient and sound velocity of ultrasonic wave were used to be evaluating indicators of healing effectiveness of crack rehabilitation in this method. Effect of currency density, concentration of electrolyte solution on healing effectiveness of porous reinforced concretes with different total void ratio was studied. The experimental results indicate that the simulation of porous concrete for cracks can reflect the healing effectiveness of electrodeposition method effectively. Total void ratio of porous concrete has little effect on healing effectiveness of electrodeposition at early ages. The higher the currency density or concentration of electrolyte solution is, the higher the electrodeposition rate and sound velocity in porous concrete are, and the lower the permeation coefficient of porous concrete will be. Mg(OH) 2 crystals produced in high current density are large, thin sheet-shaped and arranged loosely.

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Section: Introductionmentioning

confidence: 99%

Healing effectiveness of cracks rehabilitation in reinforced concrete using electrodeposition method

Jiang

Xing

Sun

et al. 2008

J. Wuhan Univ. Technol.-Mat. Sci. Edit.

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“…It has been reported that the electrodeposition method can be adopted to close the crack in the reinforced concrete (Chu et al 2014;Ryu and Otsuki 2002). At the same time, it has also been indicated that the electrodeposition method can simultaneously coat the surface of concrete (where there are no cracks).…”

Section: Introductionmentioning

confidence: 99%

“…It is promising for such an electrodeposition method to carry out both surface coating layer formation and densification of not cracked concrete so as to upgrade its durability. However, the deposition products on the surface and in the pores of concrete are ZnO and Mg(OH) 2 , which are obviously different from the main composition of binder, and even the acidification of concrete may be induced by the above electrodeposition method according to the involved chemical reactions (Ryu and Otsuki 2002). Based on these, we develop a new electrodeposition method to make the densification and coat the surface of concrete in this paper.…”

Section: Introductionmentioning

confidence: 99%

Application of Electrodeposition Method in Upgrading Mortar Durability

Feng

Shan

et al. 2015

ACT

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Journal of AdvancedAbstract A novel electrodeposition method in which silicate ions are key materials, has been applied on mortar samples. The microstructures of electrodeposited mortar were observed using scanning electron microscopy (SEM), X-ray diffraction instrument (XRD), mercury intrusion porosimeter (MIP) and differential thermo-gravimetric analysis (DTG). The durability of electrodeposited mortar was evaluated by examining the resistance to carbonization, sulfate attack and chloride diffusion. The results indicate that the method can not only refine the pore structure, but also coat the surface of mortar. In comparison with the control mortar, the carbonization depth at the same carbonization time and the reduction in the compressive strength after the identical time of exposure to sodium sulfate solution for the electrodeposited mortar are decreased. In addition, the chloride diffusion coefficient is remarkably decreased by approximate three times. Based on these, the electrodeposition method is promising for the application in upgrading the durability of real concrete structure.

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“…Electrodeposition method is one of the potential techniques in dealing with cracks. Investigations proved that it is possible to close the cracks in reinforced concrete by applying an electric current, especially under marine enviroment where other traditional repair systems are inefficient [1][2][3][4] .…”

Section: Introductionmentioning

confidence: 99%

“…This can be accomplished by feeding a weak direct current between the reinforcing steel bar in the marine concrete structure with cracks and indissoluble anode located under seawater. Some studies on the feasiblity of remediating cracks with electrodeposition method have been made in Janpan, USA, and China in recent years [1][2][3][4][5][6][7][8][9][10] .…”

Section: Introductionmentioning

confidence: 99%

Influence of additives on the formation of electrodeposits in the concrete cracks

Chu

Wang

2011

J. Wuhan Univ. Technol.-Mat. Sci. Edit.

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The electrodeposition method for rehabilitation of the cracked reinforced concrete, based on the electrochemical technique, was presented here. The aim of this study was to evaluate the influence of additive on the formation of electrodeposits in the concrete cracks. Cracked mortar specimens of size 40 mm×40 mm×160 mm were immersed in electrolyte solutions(ZnSO 4 , MgSO 4 ), and a constant current was applied between the reinforced steel and the external electrode for 15 days. Rate of surface coating, rate of crack closure and rate of crack filling depth were measured and the appearance of electrodeposits in the cracks was observed. The experimental results demonstrate that, under the experimental conditions, rate of surface coating and crack filling depth increase, while rate of crack closure decreases as the percengtage of additive increases. In addition, the electrodeposits become more denser and the microstructure varies with additive content, while the compositions of electrodeposits do not change.

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Crack closure of reinforced concrete by electrodeposition technique

Cited by 90 publications

References 1 publication

Healing effectiveness of cracks rehabilitation in reinforced concrete using electrodeposition method

Healing effectiveness of cracks rehabilitation in reinforced concrete using electrodeposition method

Application of Electrodeposition Method in Upgrading Mortar Durability

Influence of additives on the formation of electrodeposits in the concrete cracks

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