Experimental study on anticorrosive effect of new developed sacrificial point anode method

Maki Koda, Toshiyuki Aoyama, Daisuke Yamamoto, Hidenori Hamada

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A new sacrificial anode method was developed in this study. This sacrificial point anode method has three main features: the anode raw material is zinc, material covering the anode is mortar containing a lithium nitrite solution, and site casting is possible using a system to inject mortar on site. This method was applied to a 36-year-old RC beam that had been exposed to marine environment conditions for more than 20 years. Cracks due to steel bar corrosion were found especially on the tension side. Moreover, corrosion (rust and loss of cross-section) of steel bars embedded in the RC beam was confirmed by a partial chipping survey. After six holes 30 mm in diameter were drilled in the RC beam, this point anode was set in a position of 50 mm from the tensile steel bar, and a special mortar was injected into the hole. After this method was applied, the condition of steel bars in the RC beam was measured with an electrochemical measurement method such as electric current, potential, 24-hour depolarization, anodic polarization curve, and polarization resistance. From corrosion current density evaluated by both anodic polarization curve and polarization resistance after exposure in dry conditions for 20 months, it was confirmed that corrosion was prevented on steel bars.

Original languageEnglish
Title of host publicationHigh Tech Concrete
Subtitle of host publicationWhere Technology and Engineering Meet - Proceedings of the 2017 fib Symposium
PublisherSpringer International Publishing
Pages2032-2040
Number of pages9
ISBN (Electronic)9783319594705
DOIs
Publication statusPublished - 2017
Event2017 fib Symposium - High Tech Concrete: Where Technology and Engineering Meet - Maastricht, Netherlands
Duration: Jun 12 2017Jun 14 2017

Other

Other2017 fib Symposium - High Tech Concrete: Where Technology and Engineering Meet
CountryNetherlands
CityMaastricht
Period6/12/176/14/17

Fingerprint

Anodes
Mortar
Steel
Corrosion
Anodic polarization
Polarization
Depolarization
Electric currents
Raw materials
Casting
Lithium
Zinc
Current density
Cracks

All Science Journal Classification (ASJC) codes

  • Architecture
  • Building and Construction
  • Civil and Structural Engineering

Cite this

Koda, M., Aoyama, T., Yamamoto, D., & Hamada, H. (2017). Experimental study on anticorrosive effect of new developed sacrificial point anode method. In High Tech Concrete: Where Technology and Engineering Meet - Proceedings of the 2017 fib Symposium (pp. 2032-2040). Springer International Publishing. https://doi.org/10.1007/978-3-319-59471-2_232

Experimental study on anticorrosive effect of new developed sacrificial point anode method. / Koda, Maki; Aoyama, Toshiyuki; Yamamoto, Daisuke; Hamada, Hidenori.

High Tech Concrete: Where Technology and Engineering Meet - Proceedings of the 2017 fib Symposium. Springer International Publishing, 2017. p. 2032-2040.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Koda, M, Aoyama, T, Yamamoto, D & Hamada, H 2017, Experimental study on anticorrosive effect of new developed sacrificial point anode method. in High Tech Concrete: Where Technology and Engineering Meet - Proceedings of the 2017 fib Symposium. Springer International Publishing, pp. 2032-2040, 2017 fib Symposium - High Tech Concrete: Where Technology and Engineering Meet, Maastricht, Netherlands, 6/12/17. https://doi.org/10.1007/978-3-319-59471-2_232
Koda M, Aoyama T, Yamamoto D, Hamada H. Experimental study on anticorrosive effect of new developed sacrificial point anode method. In High Tech Concrete: Where Technology and Engineering Meet - Proceedings of the 2017 fib Symposium. Springer International Publishing. 2017. p. 2032-2040 https://doi.org/10.1007/978-3-319-59471-2_232
Koda, Maki ; Aoyama, Toshiyuki ; Yamamoto, Daisuke ; Hamada, Hidenori. / Experimental study on anticorrosive effect of new developed sacrificial point anode method. High Tech Concrete: Where Technology and Engineering Meet - Proceedings of the 2017 fib Symposium. Springer International Publishing, 2017. pp. 2032-2040
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