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

Authors

  • Gunawan Budi Wijaya Department of Civil Engineering, Petra Christian University, Jl. Siwalankerto 121-131, Surabaya 60236, INDONESIA
  • David Pratama Lays Department of Civil Engineering, Petra Christian University, Jl. Siwalankerto 121-131, Surabaya 60236, INDONESIA
  • Hongky Haodiwidjaya Tanto Department of Civil Engineering, Petra Christian University, Jl. Siwalankerto 121-131, Surabaya 60236, INDONESIA
  • Daniel Tjandra Department of Civil Engineering, Petra Christian University, Jl. Siwalankerto 121-131, Surabaya 60236, INDONESIA

DOI:

https://doi.org/10.9744/ced.21.2.84-88

Keywords:

Carbon fiber reinforced polymer laminate, graphite powder, half cell potential, impressed current cathodic protection system, pull-off test.

Abstract

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%.

References

FHWA-RD-096, Long Term Effectiveness of Cathodic Protection Systems on Highway Structures, Federal Highway Administration Research and Development, McLean, VA, USA, 2001.

Gadve, S., Mukherjee, A., and Malhotra, S.N., Active Protection of Fiber-reinforced Polymer-wrapped Reinforced Concrete Structures Against Corrosion, Corrosion, 67(2), 2011, pp. 25002–25011.

Lu, Y., Hu, J., Li, S., and Tang, W., Active and Passive Protection of Steel Reinforcement in Concrete Column Using Carbon Fibre Reinforced Polymer Against Corrosion. Electrochimica Acta. Vol. 278, 2018, pp. 124–136. https://doi. org/10.1016/j.electacta.2018.05. 037

Nguyen, C.V., Mangat, P.S., Lambert, P., O’Flaherty, F.J., and Jones, G., Dual Function Carbon Fibre Reinforced Anode System for Concrete Structures. Materials and Structures. 48(7), 2014, 2157–2167. https://doi.org/10.1617/ s11527-014-0300-0

Bahekar, P.V., and Gadve, S.S., Impressed Current Cathodic Protection of Rebar in Concrete Using Carbon FRP Laminate. Construction and Building Materials, 156, 2017, pp. 242–251. https://doi.org/10.1016/j.conbuildmat.2017. 08.145

Broomfield, J.P., Corrosion of Steel in Concrete: Understanding, Investigation and Repair, Second Edition, CRC Press, London, UK, 2006.

Wilson, K., Jawed, M., and Ngala, V., The selection of Cathodic Protection Systems for the repair of Reinforced Concrete Structures, Construction and Building Materials, Elsevier, 39, 2013, pp. 19-25,

British Standards Institution, BSI Standards Publication Cathodic Protection of Steel in Concrete (ISO 12696 : 2012). United Kingdom: BSI Standards Limited, 2012.

ASTM C876, Standard Test Method for Half-Cell Potentials of Uncoated Reinforcing Steel in Concrete, ASTM International, West Conshohocken, PA., USA, 2015.

ASTM C1583, Standard Test Method for Tensile Strength of Concrete Surfaces and Bond Strength or Tensile Strength of Concrete Repair and Overlay Materials by Direct Tension (Pull-Off Method), ASTM International, West Con-shohocken, PA., USA, 2013.

ACI 440.2R, Guide for the Design and Construction of Externally Bonded FRP Systems for Strengthening Concrete Structures, ACI Committee 440,, Farmington Hills, MI., USA, 2017.

Ahmad, S., Techniques for Inducing Accelerated Corrosion of Steel in Concrete. Arabian Journal for Science and Engineering, 34(2), 2009, pp. 95–104.

Downloads

Published

2019-10-18

How to Cite

Wijaya, G. B., Lays, D. P., Tanto, H. H., & Tjandra, D. (2019). Study on Graphite Powder as Conductive Pigments for Impressed Current Cathodic Protection System using Carbon Fiber Reinforced Polymer Anode. Civil Engineering Dimension, 21(2), 84-88. https://doi.org/10.9744/ced.21.2.84-88