Effect of environmental pre-conditioning on bond of FRP reinforcement to concrete

Salah U. Al-Dulaijan, Mesfer M. Al-Zahrani, Antonio Nanni, Thomas E. Boothby

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

To determine how environment affects the bond behavior of FRP reinforcement for concrete, FRP rods were subjected to accelerated environmental pre-conditioning and several mechanical tests. Specially-made smooth and lugged FRP rods consisting of glass/vinylester, carbon/vinylester, and carbon/epoxy composites were evaluated. The primary means of comparison of the pre-conditioned materials was the direct pull-out test, although pertinent properties of rods such as short-beam apparent shear strength and longitudinal modulus of elasticity were also evaluated. The results reveal that pre-conditioning of FRP rods prior to casting degrades the FRP material itself, but does not necessarily degrade the bond behavior. In particular, the smooth rods, which had low bond strength to begin with, had little change in bond strength. On the other hand, the lugged rods, which were made susceptible to the environment by the machining of lugs, had significantly reduced bond strength due to degradation of the resin or the fiber/resin interface. Of the three types of aqueous environments evaluated, high temperature combined with an alkaline solution is the most aggressive to the FRP materials evaluated. Certain experiments highlighted the importance of the resin rich surface on environmental resistance.

Original languageEnglish
Pages (from-to)881-900
Number of pages20
JournalJournal of Reinforced Plastics and Composites
Volume20
Issue number10
DOIs
StatePublished - Aug 14 2001
Externally publishedYes

Fingerprint

Reinforcement
Resins
Concretes
Carbon
Shear strength
Machining
Casting
Elastic moduli
Degradation
Glass
Fibers
Composite materials
Experiments
Temperature

Keywords

  • Bond strength
  • Carbon fibers
  • Concrete
  • Environmental pre-conditioning
  • FRP reinforcement
  • Glass fibers
  • Pull-out test
  • Resin
  • Shear strength

ASJC Scopus subject areas

  • Ceramics and Composites
  • Polymers and Plastics
  • Materials Chemistry

Cite this

Effect of environmental pre-conditioning on bond of FRP reinforcement to concrete. / Al-Dulaijan, Salah U.; Al-Zahrani, Mesfer M.; Nanni, Antonio; Boothby, Thomas E.

In: Journal of Reinforced Plastics and Composites, Vol. 20, No. 10, 14.08.2001, p. 881-900.

Research output: Contribution to journalArticle

Al-Dulaijan, Salah U. ; Al-Zahrani, Mesfer M. ; Nanni, Antonio ; Boothby, Thomas E. / Effect of environmental pre-conditioning on bond of FRP reinforcement to concrete. In: Journal of Reinforced Plastics and Composites. 2001 ; Vol. 20, No. 10. pp. 881-900.
@article{746fd29762614dc98171d7409cbf8bde,
title = "Effect of environmental pre-conditioning on bond of FRP reinforcement to concrete",
abstract = "To determine how environment affects the bond behavior of FRP reinforcement for concrete, FRP rods were subjected to accelerated environmental pre-conditioning and several mechanical tests. Specially-made smooth and lugged FRP rods consisting of glass/vinylester, carbon/vinylester, and carbon/epoxy composites were evaluated. The primary means of comparison of the pre-conditioned materials was the direct pull-out test, although pertinent properties of rods such as short-beam apparent shear strength and longitudinal modulus of elasticity were also evaluated. The results reveal that pre-conditioning of FRP rods prior to casting degrades the FRP material itself, but does not necessarily degrade the bond behavior. In particular, the smooth rods, which had low bond strength to begin with, had little change in bond strength. On the other hand, the lugged rods, which were made susceptible to the environment by the machining of lugs, had significantly reduced bond strength due to degradation of the resin or the fiber/resin interface. Of the three types of aqueous environments evaluated, high temperature combined with an alkaline solution is the most aggressive to the FRP materials evaluated. Certain experiments highlighted the importance of the resin rich surface on environmental resistance.",
keywords = "Bond strength, Carbon fibers, Concrete, Environmental pre-conditioning, FRP reinforcement, Glass fibers, Pull-out test, Resin, Shear strength",
author = "Al-Dulaijan, {Salah U.} and Al-Zahrani, {Mesfer M.} and Antonio Nanni and Boothby, {Thomas E.}",
year = "2001",
month = "8",
day = "14",
doi = "10.1106/TBU1-D7CV-PQVQ-FR61",
language = "English",
volume = "20",
pages = "881--900",
journal = "Journal of Reinforced Plastics and Composites",
issn = "0731-6844",
publisher = "SAGE Publications Ltd",
number = "10",

}

TY - JOUR

T1 - Effect of environmental pre-conditioning on bond of FRP reinforcement to concrete

AU - Al-Dulaijan, Salah U.

AU - Al-Zahrani, Mesfer M.

AU - Nanni, Antonio

AU - Boothby, Thomas E.

PY - 2001/8/14

Y1 - 2001/8/14

N2 - To determine how environment affects the bond behavior of FRP reinforcement for concrete, FRP rods were subjected to accelerated environmental pre-conditioning and several mechanical tests. Specially-made smooth and lugged FRP rods consisting of glass/vinylester, carbon/vinylester, and carbon/epoxy composites were evaluated. The primary means of comparison of the pre-conditioned materials was the direct pull-out test, although pertinent properties of rods such as short-beam apparent shear strength and longitudinal modulus of elasticity were also evaluated. The results reveal that pre-conditioning of FRP rods prior to casting degrades the FRP material itself, but does not necessarily degrade the bond behavior. In particular, the smooth rods, which had low bond strength to begin with, had little change in bond strength. On the other hand, the lugged rods, which were made susceptible to the environment by the machining of lugs, had significantly reduced bond strength due to degradation of the resin or the fiber/resin interface. Of the three types of aqueous environments evaluated, high temperature combined with an alkaline solution is the most aggressive to the FRP materials evaluated. Certain experiments highlighted the importance of the resin rich surface on environmental resistance.

AB - To determine how environment affects the bond behavior of FRP reinforcement for concrete, FRP rods were subjected to accelerated environmental pre-conditioning and several mechanical tests. Specially-made smooth and lugged FRP rods consisting of glass/vinylester, carbon/vinylester, and carbon/epoxy composites were evaluated. The primary means of comparison of the pre-conditioned materials was the direct pull-out test, although pertinent properties of rods such as short-beam apparent shear strength and longitudinal modulus of elasticity were also evaluated. The results reveal that pre-conditioning of FRP rods prior to casting degrades the FRP material itself, but does not necessarily degrade the bond behavior. In particular, the smooth rods, which had low bond strength to begin with, had little change in bond strength. On the other hand, the lugged rods, which were made susceptible to the environment by the machining of lugs, had significantly reduced bond strength due to degradation of the resin or the fiber/resin interface. Of the three types of aqueous environments evaluated, high temperature combined with an alkaline solution is the most aggressive to the FRP materials evaluated. Certain experiments highlighted the importance of the resin rich surface on environmental resistance.

KW - Bond strength

KW - Carbon fibers

KW - Concrete

KW - Environmental pre-conditioning

KW - FRP reinforcement

KW - Glass fibers

KW - Pull-out test

KW - Resin

KW - Shear strength

UR - http://www.scopus.com/inward/record.url?scp=0034915583&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0034915583&partnerID=8YFLogxK

U2 - 10.1106/TBU1-D7CV-PQVQ-FR61

DO - 10.1106/TBU1-D7CV-PQVQ-FR61

M3 - Article

VL - 20

SP - 881

EP - 900

JO - Journal of Reinforced Plastics and Composites

JF - Journal of Reinforced Plastics and Composites

SN - 0731-6844

IS - 10

ER -