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 journalArticle

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
JournalStructural Concrete
DOIs
Publication statusE-pub ahead of print - 28 Jun 2019

Fingerprint

Steel fibers
Reinforced concrete
Chlorides
Reinforcement
Corrosion
Fibers

Cite this

@article{5abe0ee159114b709d7813bc09efa927,
title = "Bond behavior of reinforcement embedded in steel fiber reinforced concrete under chloride attack",
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.",
keywords = "bond, bond strength, chloride corrosion, model, SFRC",
author = "Lijun Hou and Ziyao Ye and Bingxuan Zhou and Chun Shen and Farhad Aslani and Da Chen",
year = "2019",
month = "6",
day = "28",
doi = "10.1002/suco.201800246",
language = "English",
journal = "Structural Concrete",
issn = "0307-8434",
publisher = "Wiley Blackwell",

}

Bond behavior of reinforcement embedded in steel fiber reinforced concrete under chloride attack. / Hou, Lijun; Ye, Ziyao; Zhou, Bingxuan; Shen, Chun; Aslani, Farhad; Chen, Da.

In: Structural Concrete, 28.06.2019.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Bond behavior of reinforcement embedded in steel fiber reinforced concrete under chloride attack

AU - Hou, Lijun

AU - Ye, Ziyao

AU - Zhou, Bingxuan

AU - Shen, Chun

AU - Aslani, Farhad

AU - Chen, Da

PY - 2019/6/28

Y1 - 2019/6/28

N2 - 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.

AB - 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.

KW - bond

KW - bond strength

KW - chloride corrosion

KW - model

KW - SFRC

UR - http://www.scopus.com/inward/record.url?scp=85068368877&partnerID=8YFLogxK

U2 - 10.1002/suco.201800246

DO - 10.1002/suco.201800246

M3 - Article

JO - Structural Concrete

JF - Structural Concrete

SN - 0307-8434

ER -