Bond behavior of reinforcement embedded in steel fiber reinforced concrete under chloride attack

Lijun Hou, Ziyao Ye, Bingxuan Zhou, Chun Shen, Farhad Aslani, Da Chen

Research output: Contribution to journalArticlepeer-review

20 Citations (Scopus)

Abstract

Bonding between rebar and steel fiber reinforced concrete (SFRC) has a major effect on reinforced SFRC members exposed to chloride environments where both steel fiber and reinforcement are subjected to corrosion damage. This paper presents an experimental study of the effect of corrosion on the bond behavior of reinforcement and SFRC. The test parameters include corrosion ratio, fiber fraction, and cover thickness-rebar diameter ratio (c/d). Failure patterns, bond-slip curves, and bond strength were compared. Increasing fiber fraction and c/d ratio enhanced bond strength and residual bond strength through improved confinement by the surrounding SFRC. With increasing corrosion, bond strength at first retained its initial strength or increased slightly and then reduced at corrosion ratios beyond 6–8.88%. A bond strength model is proposed which considers the combined effect of corrosion ratio, fiber fraction, and c/d ratio.

Original languageEnglish
Pages (from-to)2242-2255
Number of pages14
JournalStructural Concrete
Volume20
Issue number6
Early online date28 Jun 2019
DOIs
Publication statusPublished - 1 Dec 2019

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