Influence of anti-corrosive coatings on bond behavior of corroded rebar

Mohammad Ridduhan Natino*, Yizhou Yang, Hikaru Nakamura, Taito Miura

*Corresponding author for this work

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

Abstract

This research aims to investigate the influence of anti-corrosive coating on the bond behavior of coated corroded rebar to concrete. Two different types of anti-corrosive coating materials have been considered and each is to be applied manually. The test specimens are divided into six groups. Group I contains sound or non-corroded rebar serve as control group, Group II and III are the coated sound rebar groups serve to investigate the direct effect of coating, while Group IV is the bare corroded rebar group, and the Group V and VI are the coated corroded rebar groups. The accelerated electric corrosion method is employed for the Group IV-VI with a varying target degree of corrosion ranging from 5% to 10%. After the target corrosion degree is achieved, laser scanning test is conducted to investigate the change in geometrical properties of the sound/coated and the coated corroded rebar groups. Thereafter, Group IIII are casted and Group IV-VI are re-casted into new specimens and bond-slip relationships are measured through two-end pull out test. As important findings, the anti-corrosive coating materials have a significant influence on the bond behavior. Cementitious coated exhibits a brittle bond-slip behavior and shows a better performance as compared to epoxy coated with a ductile bond-slip behavior.

Original languageEnglish
Title of host publicationConcrete structures for resilient society - Proceedings of the fib Symposium, 2020
EditorsBin Zhao, Xilin Lu
Publisherfib. The International Federation for Structural Concrete
Pages2205-2213
Number of pages9
ISBN (Print)9782940643042
Publication statusPublished - 2020
Externally publishedYes
EventInternational fib Symposium on Concrete structures for resilient society, 2020 - Virtual, Online
Duration: 2020 Nov 222020 Nov 24

Publication series

Namefib Symposium
ISSN (Print)2617-4820

Conference

ConferenceInternational fib Symposium on Concrete structures for resilient society, 2020
CityVirtual, Online
Period20/11/2220/11/24

Keywords

  • Anti-corrosive coating
  • Bond-slip relationship
  • Corrosion
  • Laser scanning
  • Two end pull-out test

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • Materials Science (miscellaneous)

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