Experimental Studies of Effectiveness of Hybrid Cathodic Protection System on the Steel in Concrete

Jeong, Jae-Yong; Jin, Chungkuk

doi:10.1166/sam.2014.2061

Cited by 8 publications

(4 citation statements)

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“…Because the throwing power is only a few centimeters, depending on the surrounding conditions, the workability of the SACP system in marine tidal and splash zones is limited [19][20][21]. To address the inherent limitations of SACP, a hybrid CP system that integrates ICCP and SACP was developed [22,23]; however, this approach introduces challenges to practicality, as it increases the system complexity and may lead to interference between the two CP systems.…”

Section: Introductionmentioning

confidence: 99%

Development of Conductive Mortar for Efficient Sacrificial Anode Cathodic Protection of Reinforced Concrete Structures—Part 2: Four-Year Performance Evaluation in Bridges

Ha,

Jeong,

Jin

2024

Applied Sciences

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This study explores the efficacy of a sacrificial anode cathodic protection (SACP) system with an activated carbon-based conductive mortar in bridge structures. In the previous Part 1 study, various admixtures were compared to identify a conductive mortar for enhancing the performance of the SACP system, assessed through electrical conductivity, resistivity, cathodic protection (CP) potential and current, and 4 h depolarization potential. Part 2 extends the investigation by applying the developed conductive mortar containing activated carbon to an SACP system on an actual bridge structure in which corrosion has already been initiated. Before CP installation, the physical properties of the conductive mortar were evaluated to satisfy the standard requirements for concrete structure maintenance. Subsequently, zinc mesh and bulk anodes were installed on the bridge pier, followed by the application of a conductive mortar with an admixture ratio of 5%. Over a four-year period, performance was measured through regular 4 h depolarization potential checks and visual inspections. The SACP system with the conductive mortar demonstrated superior CP performance compared to the general mortar, confirming the effectiveness of the developed conductive mortar. Visual inspection after four years confirmed the workability of the SACP system with conductive mortar.

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Section: Introductionmentioning

confidence: 99%

Development of Conductive Mortar for Efficient Sacrificial Anode Cathodic Protection of Reinforced Concrete Structures—Part 2: Four-Year Performance Evaluation in Bridges

Ha,

Jeong,

Jin

2024

Applied Sciences

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“…This leads to limitations of SACP system application for tidal and splash zones, considering that throwing power is reported to be only a few centimeters, depending on the surrounding environments (e.g., concrete resistivity) [17][18][19]. To overcome these critical limitations of SACP, for example, a hybrid CP system that combines SACP and ICCP was proposed [20,21]; however, this method increases the system complexity. If there exists a way to efficiently protect the tidal or splash zone by only the SACP system, it will greatly benefit the corrosion protection market.…”

Section: Introductionmentioning

confidence: 99%

Development of Conductive Mortar for Efficient Sacrificial Anode Cathodic Protection of Reinforced Concrete Structures—Part 1: Laboratory Experiments

Ha¹,

Jeong

Jin

2022

Applied Sciences

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This experimental study proposes a conductive mortar to increase the efficiency of the sacrificial anode cathodic protection (SACP) system by decreasing resistivity and maintaining it for a long time. The resistivity characteristics of the mortar that contained electrically conductive admixtures and/or chemical agents were evaluated by the Brunauer–Emmett–Teller (BET) method and resistivity measurements. The conductive mortar with activated carbon and sodium hydroxide had the lowest resistivity. The SACP system was then designed to evaluate the cathodic protection (CP) performance with the proposed activated-carbon-based conductive mortar. The proposed conductive mortar contributed to lower CP potential and higher current density and depolarization potential than the general mortar.

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“…Impressed current cathodic protection is preferred to be implemented in wide and severe RC structures exposed to the marine environment. Hybrid cathodic protection technology using sacrificial anodes and impressed current methods was developed by researchers [18][19][20][21]. For the impressive current cathodic protection, regular monitoring in order to assess the levels of cathodic protection being afforded to the structure is required.…”

Section: Introductionmentioning

confidence: 99%

Effective Use of Sacrificial Zinc Anode as a Suitable Repair Method for Severely Damaged RC Members Due to Chloride Attack

Astuti

Rafdinal²,

Yamamoto

et al. 2022

Civ Eng J

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In many cases, the repair strategy by using sacrificial anodes for cathodic protection in real RC structures requires additional zinc anodes after several years due to the decreasing protective area. This experimental study evaluates the effectiveness of time lag application of sacrificial anode cathodic protection applied to RC beam specimens that deteriorated severely due to chloride attack. In the experiment, sacrificial anodes and cathodic protection (SACP) were applied to 41-year-old RC beam specimens exposed to natural marine environments in which the embedded steel bars were significantly corroded. The repair work was performed in three stages. Instant-off and rest potential tests of steel bars were conducted periodically to demonstrate the time-dependent depolarization value. In the first stage, a polymer-modified mortar as a patch repair material was cast to replace the concrete in the middle tensile part with small sacrificial anodes embedded in the mortar. After the protective current reaches an equilibrium state, the sacrificial anodes are disconnected from the steel bars for a year, defined as the second stage. During the one year in the second stage, the steel bar in the patch repair area remained passive, without any sign of corrosion. As for the third stage, additional sacrificial anodes were installed in the existing concrete part to protect the steel in it. From one year of observation after applying sacrificial anodes to old concrete parts, the time lag SACP application of both in patch and non-patch repair parts was clarified to be effective in stopping the corrosion of steel bar in both parts until 20–30 years based on the service life prediction. Doi: 10.28991/CEJ-2022-08-07-015 Full Text: PDF

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Experimental Studies of Effectiveness of Hybrid Cathodic Protection System on the Steel in Concrete

Cited by 8 publications

References 0 publications

Development of Conductive Mortar for Efficient Sacrificial Anode Cathodic Protection of Reinforced Concrete Structures—Part 2: Four-Year Performance Evaluation in Bridges

Development of Conductive Mortar for Efficient Sacrificial Anode Cathodic Protection of Reinforced Concrete Structures—Part 2: Four-Year Performance Evaluation in Bridges

Development of Conductive Mortar for Efficient Sacrificial Anode Cathodic Protection of Reinforced Concrete Structures—Part 1: Laboratory Experiments

Effective Use of Sacrificial Zinc Anode as a Suitable Repair Method for Severely Damaged RC Members Due to Chloride Attack

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