FRP-concrete bond performance under accelerated hygrothermal conditions

Faisal M. Mukhtar; Abheetha Peiris

doi:10.1016/j.conbuildmat.2020.121403

FRP-concrete bond performance under accelerated hygrothermal conditions

Faisal M. Mukhtar, Abheetha Peiris

Research output: Contribution to journal › Article › peer-review

25 Scopus citations

Abstract

Drawing on information obtained via double lap shear tests, this paper discusses FRP-concrete bond behavior following five weeks of exposure to several accelerated hygrothermal conditions. Material tests were also carried out for both dry carbon fibers and the epoxy used in the bond study under similar hygrothermal conditions. The bond-slip relationship for the hygrothermal conditions were developed, and fracture energy calculated for the FRP-concrete bond. The use of degraded material properties obtained from material test coupons under the same exposure conditions prevented overestimation of the FRP-concrete bond fracture energy. Testing revealed that the FRP-concrete bond strength increased as temperature increased at low humidity (dry heat) — a potential consequence of alteration in the epoxy glass transition temperature. The bond strength of concrete with steel slag incorporated was superior at all temperatures and low humidity. In response to continuous or periodic submergence in water, specimen failure mode transitioned from substrate failure to adhesive-concrete interface failure. Alternating two-day wet/dry cycles resulted in a 12% drop of FRP-concrete bond strength. Under low humidity, the FRP dry fiber tensile stress increased as temperature increased (dry heat), while the opposite dynamic was observed in the epoxy coupons.

Original language	English
Article number	121403
Journal	Construction and Building Materials
Volume	270
DOIs	https://doi.org/10.1016/j.conbuildmat.2020.121403
State	Published - Feb 8 2021

Bibliographical note

Funding Information:
The authors would like to acknowledge the financial support provided by the Deanship of Scientific Research at King Fahd University of Petroleum & Minerals (KFUPM) under Research Grant IN161031 . The help provided by the Civil Engineering Structural Laboratory engineers and the support of Mechanical Engineering Department are highly appreciated. The support of Dr. Christoper Van Dyke (Kentucky Transportation Center, USA), and that of Messrs Romeo Agua (KFUPM) and Rayhan Faysal are also acknowledged.

Funding Information:
The authors would like to acknowledge the financial support provided by the Deanship of Scientific Research at King Fahd University of Petroleum & Minerals (KFUPM) under Research Grant IN161031. The help provided by the Civil Engineering Structural Laboratory engineers and the support of Mechanical Engineering Department are highly appreciated. The support of Dr. Christoper Van Dyke (Kentucky Transportation Center, USA), and that of Messrs Romeo Agua (KFUPM) and Rayhan Faysal are also acknowledged.

Publisher Copyright:
© 2020 Elsevier Ltd

Funding

The authors would like to acknowledge the financial support provided by the Deanship of Scientific Research at King Fahd University of Petroleum & Minerals (KFUPM) under Research Grant IN161031 . The help provided by the Civil Engineering Structural Laboratory engineers and the support of Mechanical Engineering Department are highly appreciated. The support of Dr. Christoper Van Dyke (Kentucky Transportation Center, USA), and that of Messrs Romeo Agua (KFUPM) and Rayhan Faysal are also acknowledged. The authors would like to acknowledge the financial support provided by the Deanship of Scientific Research at King Fahd University of Petroleum & Minerals (KFUPM) under Research Grant IN161031. The help provided by the Civil Engineering Structural Laboratory engineers and the support of Mechanical Engineering Department are highly appreciated. The support of Dr. Christoper Van Dyke (Kentucky Transportation Center, USA), and that of Messrs Romeo Agua (KFUPM) and Rayhan Faysal are also acknowledged.

Funders	Funder number
Civil Engineering Structural Laboratory engineers
Deanship of Scientific Research at King Fahd University of Petroleum & Minerals
Kentucky Transportation Center
Messrs Romeo Agua
Rayhan Faysal
King Fahd University of Petroleum and Minerals	IN161031

Keywords

Bond strength
Concrete
Epoxy
FRP
Hygrothermal effect

ASJC Scopus subject areas

Civil and Structural Engineering
Building and Construction
General Materials Science

Access to Document

10.1016/j.conbuildmat.2020.121403

Cite this

@article{a6cc76285bef49f8bda019ed41726a57,

title = "FRP-concrete bond performance under accelerated hygrothermal conditions",

abstract = "Drawing on information obtained via double lap shear tests, this paper discusses FRP-concrete bond behavior following five weeks of exposure to several accelerated hygrothermal conditions. Material tests were also carried out for both dry carbon fibers and the epoxy used in the bond study under similar hygrothermal conditions. The bond-slip relationship for the hygrothermal conditions were developed, and fracture energy calculated for the FRP-concrete bond. The use of degraded material properties obtained from material test coupons under the same exposure conditions prevented overestimation of the FRP-concrete bond fracture energy. Testing revealed that the FRP-concrete bond strength increased as temperature increased at low humidity (dry heat) — a potential consequence of alteration in the epoxy glass transition temperature. The bond strength of concrete with steel slag incorporated was superior at all temperatures and low humidity. In response to continuous or periodic submergence in water, specimen failure mode transitioned from substrate failure to adhesive-concrete interface failure. Alternating two-day wet/dry cycles resulted in a 12% drop of FRP-concrete bond strength. Under low humidity, the FRP dry fiber tensile stress increased as temperature increased (dry heat), while the opposite dynamic was observed in the epoxy coupons.",

keywords = "Bond strength, Concrete, Epoxy, FRP, Hygrothermal effect",

author = "Mukhtar, {Faisal M.} and Abheetha Peiris",

note = "Funding Information: The authors would like to acknowledge the financial support provided by the Deanship of Scientific Research at King Fahd University of Petroleum & Minerals (KFUPM) under Research Grant IN161031 . The help provided by the Civil Engineering Structural Laboratory engineers and the support of Mechanical Engineering Department are highly appreciated. The support of Dr. Christoper Van Dyke (Kentucky Transportation Center, USA), and that of Messrs Romeo Agua (KFUPM) and Rayhan Faysal are also acknowledged. Funding Information: The authors would like to acknowledge the financial support provided by the Deanship of Scientific Research at King Fahd University of Petroleum & Minerals (KFUPM) under Research Grant IN161031. The help provided by the Civil Engineering Structural Laboratory engineers and the support of Mechanical Engineering Department are highly appreciated. The support of Dr. Christoper Van Dyke (Kentucky Transportation Center, USA), and that of Messrs Romeo Agua (KFUPM) and Rayhan Faysal are also acknowledged. Publisher Copyright: {\textcopyright} 2020 Elsevier Ltd",

year = "2021",

month = feb,

day = "8",

doi = "10.1016/j.conbuildmat.2020.121403",

language = "English",

volume = "270",

}

TY - JOUR

T1 - FRP-concrete bond performance under accelerated hygrothermal conditions

AU - Mukhtar, Faisal M.

AU - Peiris, Abheetha

N1 - Funding Information: The authors would like to acknowledge the financial support provided by the Deanship of Scientific Research at King Fahd University of Petroleum & Minerals (KFUPM) under Research Grant IN161031 . The help provided by the Civil Engineering Structural Laboratory engineers and the support of Mechanical Engineering Department are highly appreciated. The support of Dr. Christoper Van Dyke (Kentucky Transportation Center, USA), and that of Messrs Romeo Agua (KFUPM) and Rayhan Faysal are also acknowledged. Funding Information: The authors would like to acknowledge the financial support provided by the Deanship of Scientific Research at King Fahd University of Petroleum & Minerals (KFUPM) under Research Grant IN161031. The help provided by the Civil Engineering Structural Laboratory engineers and the support of Mechanical Engineering Department are highly appreciated. The support of Dr. Christoper Van Dyke (Kentucky Transportation Center, USA), and that of Messrs Romeo Agua (KFUPM) and Rayhan Faysal are also acknowledged. Publisher Copyright: © 2020 Elsevier Ltd

PY - 2021/2/8

Y1 - 2021/2/8

N2 - Drawing on information obtained via double lap shear tests, this paper discusses FRP-concrete bond behavior following five weeks of exposure to several accelerated hygrothermal conditions. Material tests were also carried out for both dry carbon fibers and the epoxy used in the bond study under similar hygrothermal conditions. The bond-slip relationship for the hygrothermal conditions were developed, and fracture energy calculated for the FRP-concrete bond. The use of degraded material properties obtained from material test coupons under the same exposure conditions prevented overestimation of the FRP-concrete bond fracture energy. Testing revealed that the FRP-concrete bond strength increased as temperature increased at low humidity (dry heat) — a potential consequence of alteration in the epoxy glass transition temperature. The bond strength of concrete with steel slag incorporated was superior at all temperatures and low humidity. In response to continuous or periodic submergence in water, specimen failure mode transitioned from substrate failure to adhesive-concrete interface failure. Alternating two-day wet/dry cycles resulted in a 12% drop of FRP-concrete bond strength. Under low humidity, the FRP dry fiber tensile stress increased as temperature increased (dry heat), while the opposite dynamic was observed in the epoxy coupons.

AB - Drawing on information obtained via double lap shear tests, this paper discusses FRP-concrete bond behavior following five weeks of exposure to several accelerated hygrothermal conditions. Material tests were also carried out for both dry carbon fibers and the epoxy used in the bond study under similar hygrothermal conditions. The bond-slip relationship for the hygrothermal conditions were developed, and fracture energy calculated for the FRP-concrete bond. The use of degraded material properties obtained from material test coupons under the same exposure conditions prevented overestimation of the FRP-concrete bond fracture energy. Testing revealed that the FRP-concrete bond strength increased as temperature increased at low humidity (dry heat) — a potential consequence of alteration in the epoxy glass transition temperature. The bond strength of concrete with steel slag incorporated was superior at all temperatures and low humidity. In response to continuous or periodic submergence in water, specimen failure mode transitioned from substrate failure to adhesive-concrete interface failure. Alternating two-day wet/dry cycles resulted in a 12% drop of FRP-concrete bond strength. Under low humidity, the FRP dry fiber tensile stress increased as temperature increased (dry heat), while the opposite dynamic was observed in the epoxy coupons.

KW - Bond strength

KW - Concrete

KW - Epoxy

KW - FRP

KW - Hygrothermal effect

UR - http://www.scopus.com/inward/record.url?scp=85096393140&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85096393140&partnerID=8YFLogxK

U2 - 10.1016/j.conbuildmat.2020.121403

DO - 10.1016/j.conbuildmat.2020.121403

M3 - Article

AN - SCOPUS:85096393140

SN - 0950-0618

VL - 270

JO - Construction and Building Materials

JF - Construction and Building Materials

M1 - 121403

ER -

FRP-concrete bond performance under accelerated hygrothermal conditions

Abstract

Bibliographical note

Funding

Keywords

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this