Laboratory investigation of reinforcement corrosion initiation and chloride threshold content for self-compacting concrete

Yu, Hui; Shi, Xianming; Hartt, William H.; Lu, B.T.

doi:10.1016/j.cemconres.2010.06.004

Cited by 59 publications

(20 citation statements)

References 27 publications

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“…Therefore, the influence of chloride ions on the durability of carbonated concrete structures tends to be greater than that to the uncarbonated concrete structures [1,6,7]. There are many studies on concrete carbonation and the effects of chloride on concrete durability [8][9][10][11][12][13][14]. Carbonation can reduce the pH of concrete and influence the stability of the bound chloride ions [15,16].…”

Section: Introductionmentioning

confidence: 99%

Carbonation of concrete made with dredged marine sand and its effect on chloride binding

Cui

Dong

et al. 2016

Construction and Building Materials

103

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Section: Introductionmentioning

confidence: 99%

Carbonation of concrete made with dredged marine sand and its effect on chloride binding

Cui

Dong

et al. 2016

Construction and Building Materials

103

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“…Alonso et al (2000) found that, based on the corrosion current density, rebars of specimens with the total chloride content of 0.48% by weight were in an active state at the beginning and entered a passive state after 36 days. Yu et al (2010) found that the rebar in one selfcompacting concrete specimen with a water-to-cement ratio of 0.5 was not corroded after 600 days, and Angst et al (2011) found that rebars in concrete specimens with a water-to-cement ratio of 0.4 had stable pitting only during wet cycles and immediately stopped corroding during dry cycles.…”

Section: Half-cell Potential and Corrosion Current Densitymentioning

confidence: 99%

Accelerated Laboratory Assessment of Discrete Sacrificial Anodes for Rehabilitation of Salt-Contaminated Reinforced Concrete

Shi

2020

J. Mater. Civ. Eng.

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For patch repairs of chloride contaminated RC structures, the use of discrete sacrificial anodes (DSAs) is indispensable. Without DSAs embedded, due to the ring effect, the failure of the RC around the patch area is accelerated. DSAs are increasingly being used, but few studies have evaluated the effectiveness of different DSAs and effects of the surrounding environment on the performance of different DSAs. This study employed four electrical parameters and electrochemical impedance spectroscopy (EIS) to evaluate three types of DSAs embedded in chloride-contaminated concrete through wet-dry and freeze-thaw cycles. The corrosion of the reinforcements is a stochastic process and the bound chloride ions play an important role in determining the corrosion state of the reinforcement. Most of the DSAs provided effective cathodic protection, but the effectiveness of DSAs could be influenced by the corrosion state of the reinforcement. The wet-dry and freeze-thaw cycles had significant influence on the performance of two types of the DSAs. Current DSA designs do not fully utilize the embedded Zn alloy.

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“…Corrosion is one of the major durability issues in reinforced concrete structures [ 1 , 2 ]. The high pH of concrete pore solution promotes the formation of a passive film on the surface of steel reinforcing bars for corrosion protection [ 3 ].…”

Section: Introductionmentioning

confidence: 99%

Feasibility of Distributed Fiber Optic Sensor for Corrosion Monitoring of Steel Bars in Reinforced Concrete

Fan

Bao

Chen

2018

Sensors

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This study investigates the feasibility of distributed fiber optic sensor for corrosion monitoring of steel bars embedded in concrete. Two sensor installation methods are compared: (1) attaching the sensor along the bar and (2) winding the sensor on the bar. For the second method, optical fibers were winded spirally on steel bars with different spacings: 0 mm, 2 mm, 5 mm, and 10 mm. Steel bar pull-out testing was conducted to evaluate the effect of presence of distributed sensor on the bond strength of steel–concrete interface. Electrochemical testing was carried out to assess the influence of the installation methods on the corrosion resistance of the reinforced concrete. Winding the optical fiber on steel bars with a 10-mm spacing does not affect the bond strength and corrosion resistance and allows real-time corrosion monitoring. The distributed sensor data can be used to estimate the corrosion induced steel loss and predict concrete cracking.

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Laboratory investigation of reinforcement corrosion initiation and chloride threshold content for self-compacting concrete

Cited by 59 publications

References 27 publications

Carbonation of concrete made with dredged marine sand and its effect on chloride binding

Carbonation of concrete made with dredged marine sand and its effect on chloride binding

Accelerated Laboratory Assessment of Discrete Sacrificial Anodes for Rehabilitation of Salt-Contaminated Reinforced Concrete

Feasibility of Distributed Fiber Optic Sensor for Corrosion Monitoring of Steel Bars in Reinforced Concrete

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