Light-weight cementitious conductive anode for impressed current cathodic protection of steel reinforced concrete application

Anwar, Moch. Syaiful; Sujitha, B.; Vedalakshmi, R.

doi:10.1016/j.conbuildmat.2014.08.032

Cited by 59 publications

(22 citation statements)

References 15 publications

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“…Chang et al [31] proposed converting the accelerated condition to a practical condition by the principle of equal charge quantity, wherein if the total charge quantities in the accelerated and practical conditions are the same, it was assumed that the polarization effects are identical. This relationship has been adopted in many studies on accelerated tests [32,33]. Recently, Zhang et al [34] reported that the current density has substantial effects on anode material degradation.…”

Section: Discussion On the Long-term Performance Of Cfrp As A Dual-fumentioning

confidence: 99%

Anodic and Mechanical Behavior of Carbon Fiber Reinforced Polymer as a Dual-Functional Material in Chloride-Contaminated Concrete

et al. 2020

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Carbon fiber reinforced polymer (CFRP) has been used as a dual-functional material in a hybrid intervention system (ICCP-SS) which integrates the impressed current cathodic protection (ICCP) and structural strengthening (SS). The mechanical behavior of CFRP as an anode has been investigated in some solution environments. However, the anodic and mechanical behavior of CFRP bonded to concrete is unclear. This paper focuses on the anodic and mechanical performance of CFRP bonded to the chloride-contaminated concrete by conducting an electrochemical (EC) test. The method of bonding the CFRP to the concrete and the shape of the steel embedded in the concrete were considered. The current densities of 20 mA/m2 and 100 mA/m2 were applied during 120-day and 310-day EC tests. The electrode potentials and driving voltages were recorded, and the bond interfaces of the CFRP were inspected after EC test. The residual tensile strength and failure modes of the CFRP were analyzed after tensile tests. Finally, the long-term performance of CFRP as a dual-functional material in ICCP-SS system was discussed. Results show that the externally bonding CFRP in ICCP-SS system can not only protect the steel in chloride-contaminated concrete effectively but also maintain 70% of the original tensile strength of CFRP at a charge density of 744 A·h/m2. The expected service period of CFRP as a dual-functional material bonded to the chloride-contaminated concrete was determined to be more than 42.5 years.

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Section: Discussion On the Long-term Performance Of Cfrp As A Dual-fumentioning

confidence: 99%

Anodic and Mechanical Behavior of Carbon Fiber Reinforced Polymer as a Dual-Functional Material in Chloride-Contaminated Concrete

et al. 2020

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“…In terms of durability investigation, the accelerated tests are commonly used in research investigating the efficiency of the cathodic protection technique, which mainly focuses on the corrosion of rebar (Cramer et al, 2002;García et al, 2012;Anwar et al, 2014;Lu et al, 2018;Bhuiyan et al, 2018). If the relation between an accelerated test and a normal operation condition can be identified, the results from an accelerated test can be easily converted to any specific current density level.…”

Section: Discussion On Durabilitymentioning

confidence: 99%

“…For this purpose, based on the principle of equal charge quantity (Chang et. al., 1999, Anwar et al 2014, the accelerated tests using large current densities could be treated as identical to the real situation in practice under smaller current densities for a longer time. However, this study on ICCP-SS considers both the corrosion of rebar as well as the structural performance of the interface.…”

Section: Discussion On Durabilitymentioning

confidence: 99%

Combined Impressed Current Cathodic Protection and FRCM Strengthening for Corrosion-Prone Concrete Structures

Wei

Zhu

et al. 2019

J. Compos. Constr.

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：This study introduces the use of the combined impressed current cathodic protectionstructural strengthening (ICCP-SS) as a technique for repairing reinforced concrete (RC) structures that have been subjected to chloride-induced corrosion. The development of this technique is based on the combination of a carbon fiber mesh (CF-MESH) and a polymer-modified cementitious matrix to produce a carbon fiber reinforced cementitious matrix (C-FRCM). Firstly, the effects of different types and amounts of high molecular weight polymer and short chopped carbon fibers on the flexural and compressive strength, conductivity and shear strength of a matrix with concrete substrate were investigated in order to find the optimum ingredients required for a high-performance cementitious matrix. Secondly, a shaped CF-MESH was bonded onto the surface of a concrete cube using the aforementioned optimized cementitious matrix. The impressed current cathodic protection (ICCP) technique was then applied to the specimens by using different current densities with the CF-MESH as the anode. During the Mei-ni SU 1 , Liangliang WEI 2 , Ji-Hua ZHU 3* , Tamon UEDA 4 , Guan-ping GUO 5 , Feng XING, "Combined Impressed Current Cathodic Protection and FRCM Strengthening for Corrosion-Prone Concrete Structures", Journal of composites for construction, ASCE, 23(4):04019021. protection period, the protection conditions of rebars subjected to ICCP were assessed by analyzing a variety of electrochemical parameters. Thirdly, single shear tests were conducted; the shear strengths and failure modes of the specimens were obtained and compared in order to evaluate the effects of the ICCP on shear stress transfer. The results show that the proposed technique based on the newly proposed C-FRCM composite is able to provide effective cathodic protection as well as shear stress transfer behavior to RC structures subjected to chloride-induced corrosion, leading to an improvement with respect to structural durability.

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“…The anode layer contains either granular carbon or carbon fibres with a metallic coating as the conductive medium. State-of-the-art review of cathodic protection for reinforced concrete structures Byrne, Holmes and Norton (Anwar et al, 2014). However, there is little experience with this type of anode, and the higher fibre content means such anodes are more inclined to deteriorate in the presence of chloride ions (Jing and Wu, 2011).…”

Section: Conductive Cementitious Anodesmentioning

confidence: 99%

State-of-the-art review of cathodic protection for reinforced concrete structures

Byrne¹,

Holmes²,

Norton³

2016

Magazine of Concrete Research

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Cathodic protection (CP) limits the corrosion of a metal surface by making it the cathode of an electrochemical cell.This can be achieved either by using a more active sacrificial anode to create a driving current, or by using inert anodes and impressing a current onto the cathode surface using an external direct current (DC) source. Impressed current cathodic protection (ICCP) is preferred where widespread protection is required, particularly in reinforced concrete structures. ICCP needs a constant DC power supply that is usually provided through a grid connection or independent generators. This paper presents the currently available CP systems for reinforced concrete, particularly ICCP, and the possibility of using self-sufficient and renewable energy systems. The potential for overcoming the mismatch (due to intermittent current) in energy provision from renewable sources with energy needs for CP (constant current) is discussed by exploring methods of storing energy and examining the level of protection provided by intermittent current. Areas that require further research to optimise the design of such systems are highlighted.

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Light-weight cementitious conductive anode for impressed current cathodic protection of steel reinforced concrete application

Cited by 59 publications

References 15 publications

Anodic and Mechanical Behavior of Carbon Fiber Reinforced Polymer as a Dual-Functional Material in Chloride-Contaminated Concrete

Anodic and Mechanical Behavior of Carbon Fiber Reinforced Polymer as a Dual-Functional Material in Chloride-Contaminated Concrete

Combined Impressed Current Cathodic Protection and FRCM Strengthening for Corrosion-Prone Concrete Structures

State-of-the-art review of cathodic protection for reinforced concrete structures

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