Bond strength of glass fiber-reinforced polymer bars in concrete after exposure to elevated temperatures

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

This paper presents the test results of an experimental study to investigate the effect of elevated temperatures on the bond properties of glass fiber-reinforced polymer bars in concrete. For this purpose, a total of 39 pullout specimens with glass fiber-reinforced polymer bars were cast for bond strength tests. In addition to the laboratory temperature, specimens were exposed to heating regimes of 100, 200, 300 and 350° for a period of 1, 2 or 3 h. The test results are presented in terms of bond strength, bond-slip relationship, and mode of failure. All specimens failed by shearing of the concrete corbels surrounding the bars and almost no damage was seen in the glass fiber-reinforced polymer bars. The results showed that the bond strength decreased as the temperature or exposure period increased. Reductions of about 20% of the original bond strength were recorded after exposure to 100 and 200° for 3 h. Significant reductions of about 50% in the bond strength were recorded after exposure to 350° for periods of 2 and 3 h. A modification to the ACI (American Concrete Institute) and CEB-FIP (Comité Euro-International du Béton-Fédération Internationale de la Précontrainte) equations was developed to consider the effect of elevated temperatures and it showed good agreement with test results.

Original languageEnglish
Pages (from-to)2151-2163
Number of pages13
JournalJournal of Reinforced Plastics and Composites
Volume33
Issue number23
DOIs
Publication statusPublished - Dec 27 2014

Fingerprint

Bond strength (materials)
Glass fibers
Polymers
Concretes
Temperature
Shearing
Heating
fiberglass

Keywords

  • Bond
  • concrete
  • glass fiber-reinforced polymer bars
  • interface
  • pullout test
  • temperature

ASJC Scopus subject areas

  • Mechanical Engineering
  • Mechanics of Materials
  • Polymers and Plastics
  • Materials Chemistry
  • Ceramics and Composites

Cite this

@article{e68cf04d511b45b58ab16f856c38ad2a,
title = "Bond strength of glass fiber-reinforced polymer bars in concrete after exposure to elevated temperatures",
abstract = "This paper presents the test results of an experimental study to investigate the effect of elevated temperatures on the bond properties of glass fiber-reinforced polymer bars in concrete. For this purpose, a total of 39 pullout specimens with glass fiber-reinforced polymer bars were cast for bond strength tests. In addition to the laboratory temperature, specimens were exposed to heating regimes of 100, 200, 300 and 350° for a period of 1, 2 or 3 h. The test results are presented in terms of bond strength, bond-slip relationship, and mode of failure. All specimens failed by shearing of the concrete corbels surrounding the bars and almost no damage was seen in the glass fiber-reinforced polymer bars. The results showed that the bond strength decreased as the temperature or exposure period increased. Reductions of about 20{\%} of the original bond strength were recorded after exposure to 100 and 200° for 3 h. Significant reductions of about 50{\%} in the bond strength were recorded after exposure to 350° for periods of 2 and 3 h. A modification to the ACI (American Concrete Institute) and CEB-FIP (Comit{\'e} Euro-International du B{\'e}ton-F{\'e}d{\'e}ration Internationale de la Pr{\'e}contrainte) equations was developed to consider the effect of elevated temperatures and it showed good agreement with test results.",
keywords = "Bond, concrete, glass fiber-reinforced polymer bars, interface, pullout test, temperature",
author = "Sherif El-Gamal",
year = "2014",
month = "12",
day = "27",
doi = "10.1177/0731684414555408",
language = "English",
volume = "33",
pages = "2151--2163",
journal = "Journal of Reinforced Plastics and Composites",
issn = "0731-6844",
publisher = "SAGE Publications Ltd",
number = "23",

}

TY - JOUR

T1 - Bond strength of glass fiber-reinforced polymer bars in concrete after exposure to elevated temperatures

AU - El-Gamal, Sherif

PY - 2014/12/27

Y1 - 2014/12/27

N2 - This paper presents the test results of an experimental study to investigate the effect of elevated temperatures on the bond properties of glass fiber-reinforced polymer bars in concrete. For this purpose, a total of 39 pullout specimens with glass fiber-reinforced polymer bars were cast for bond strength tests. In addition to the laboratory temperature, specimens were exposed to heating regimes of 100, 200, 300 and 350° for a period of 1, 2 or 3 h. The test results are presented in terms of bond strength, bond-slip relationship, and mode of failure. All specimens failed by shearing of the concrete corbels surrounding the bars and almost no damage was seen in the glass fiber-reinforced polymer bars. The results showed that the bond strength decreased as the temperature or exposure period increased. Reductions of about 20% of the original bond strength were recorded after exposure to 100 and 200° for 3 h. Significant reductions of about 50% in the bond strength were recorded after exposure to 350° for periods of 2 and 3 h. A modification to the ACI (American Concrete Institute) and CEB-FIP (Comité Euro-International du Béton-Fédération Internationale de la Précontrainte) equations was developed to consider the effect of elevated temperatures and it showed good agreement with test results.

AB - This paper presents the test results of an experimental study to investigate the effect of elevated temperatures on the bond properties of glass fiber-reinforced polymer bars in concrete. For this purpose, a total of 39 pullout specimens with glass fiber-reinforced polymer bars were cast for bond strength tests. In addition to the laboratory temperature, specimens were exposed to heating regimes of 100, 200, 300 and 350° for a period of 1, 2 or 3 h. The test results are presented in terms of bond strength, bond-slip relationship, and mode of failure. All specimens failed by shearing of the concrete corbels surrounding the bars and almost no damage was seen in the glass fiber-reinforced polymer bars. The results showed that the bond strength decreased as the temperature or exposure period increased. Reductions of about 20% of the original bond strength were recorded after exposure to 100 and 200° for 3 h. Significant reductions of about 50% in the bond strength were recorded after exposure to 350° for periods of 2 and 3 h. A modification to the ACI (American Concrete Institute) and CEB-FIP (Comité Euro-International du Béton-Fédération Internationale de la Précontrainte) equations was developed to consider the effect of elevated temperatures and it showed good agreement with test results.

KW - Bond

KW - concrete

KW - glass fiber-reinforced polymer bars

KW - interface

KW - pullout test

KW - temperature

UR - http://www.scopus.com/inward/record.url?scp=84912047299&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84912047299&partnerID=8YFLogxK

U2 - 10.1177/0731684414555408

DO - 10.1177/0731684414555408

M3 - Article

VL - 33

SP - 2151

EP - 2163

JO - Journal of Reinforced Plastics and Composites

JF - Journal of Reinforced Plastics and Composites

SN - 0731-6844

IS - 23

ER -