Effects of Impressed Current Cathodic Protection on Carbon Fiber-Reinforced Polymer Strengthened Flexural Reinforced Concrete Members

CORROSION ◽  
10.5006/2916 ◽  
2019 ◽  
Vol 75 (6) ◽  
pp. 693-703 ◽  
Author(s):  
Prasad V. Bahekar ◽  
Sangeeta S. Gadve
Keyword(s):  
Reinforced Concrete ◽  
Carbon Fiber ◽  
Cathodic Protection ◽  
Fiber Reinforced Polymer ◽  
Carbon Fiber Reinforced Polymer ◽  
Fiber Reinforced ◽  
Concrete Members ◽  
Reinforced Polymer ◽  
Impressed Current ◽  
Impressed Current Cathodic Protection

scholarly journals Study on Graphite Powder as Conductive Pigments for Impressed Current Cathodic Protection System using Carbon Fiber Reinforced Polymer Anode

2019 ◽  
Vol 21 (2) ◽  
pp. 84-88
Author(s):  
Gunawan Budi Wijaya ◽  
David Pratama Lays ◽  
Hongky Haodiwidjaya Tanto ◽  
Daniel Tjandra
Keyword(s):  
Carbon Fiber ◽  
Bond Strength ◽  
Cathodic Protection ◽  
Graphite Powder ◽  
Fiber Reinforced Polymer ◽  
Carbon Fiber Reinforced Polymer ◽  
Fiber Reinforced ◽  
Reinforced Polymer ◽  
Impressed Current ◽  
Impressed Current Cathodic Protection

The use of Carbon Fiber Reinforced Polymer (CFRP), for both strengthening material and anode for Impressed Current Cathodic Protection (ICCP) system, is being investigated.  The focus of this study is to develop the epoxy that has good bond strength and electrical conductivity. Graphite powder is used as conductive pigments with percentage ranges from 7.5% to 17.5%.  All specimens were partially submerged in 5% NaCl solution and induced with electrical current of 10 mA/m2 and 20 mA/m2 for 30 days. An average potential increase of 200 mV was recorded using half cell potential test. The application of 30 days ICCP up to current density of 20 mA/m2 did not affect the bond strength significantly and still complies with ACI recommendation. However, graphite content of more than 15% are found to be not workable and the bond strength is greatly reduced to less than 1 MPa This study concluded that the recommended graphite powder content shall be in the range of 10% to 15%.

scholarly journals Bond Performance of Carbon Fiber-Reinforced Polymer Bar with Dual Functions of Reinforcement and Cathodic Protection for Reinforced Concrete Structures

2020 ◽  
Vol 2020 ◽  
pp. 1-13 ◽  
Author(s):  
Yingwu Zhou ◽  
Lili Sui ◽  
Feng Xing ◽  
Xiaoxu Huang ◽  
Yaowei Zheng ◽  
...  
Keyword(s):  
Reinforced Concrete ◽  
Carbon Fiber ◽  
Cathodic Protection ◽  
Concrete Structures ◽  
Fiber Reinforced Polymer ◽  
Carbon Fiber Reinforced Polymer ◽  
Reinforced Concrete Structures ◽  
Fiber Reinforced ◽  
Reinforced Polymer ◽  
Steel Bar

The dual function of a carbon fiber-reinforced polymer (CFRP) bar working as reinforcement and impressed current cathodic protection (ICCP) anode for reinforced concrete structures has been proposed and researched in this paper. The ICCP tests with different current densities and polarization durations were first conducted for the concrete with high chloride content. After the ICCP application, pull out tests were then performed to investigate the bond behaviors of CFRP bars. Experimental results have shown the effectiveness of the new-type ICCP system with the CFRP bar as the anode on corrosion protection. The ICCP system provided electrons to the steel bar continuously and brought the potential of the steel bar down to the immunity region. Under the anodic polarization with a large current density of 100 mA/m2, the CFRP bar-concrete interface presented acidification and the chemical adhesion on the interface was decreased significantly. However, for cases in the experiment, the ICCP application had an insignificant influence on the ultimate bond strength.

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