Performance of glass fiber reinforced polymer bars under elevated temperatures

Saleh Alsayed, Yousef Al-Salloum*, Tarek Almusallam, Sherif El-Gamal, Mohammed Aqel

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

76 Citations (Scopus)


This paper investigates the residual tensile properties of newly developed glass fiber reinforced polymer (GFRP) bars after being subjected to elevated temperatures for different periods. A total of 120 GFRP specimens were tested in this study. Half of the samples were covered with concrete while the other half were bare bars. The specimens were subjected to three different controlled temperatures (100, 200 and 300 °C) for three different periods (1, 2, and 3 h). Test results showed that almost no losses were observed in the tensile modulus after all exposure periods and temperatures. Losses in the tensile strength, proportional to the level of temperature and exposure period, were recorded. The bars with concrete cover showed higher residual tensile strength compared to their counterparts without coating. The concrete cover was more effective at the lowest temperature level (100°C) and at the shortest time period (1 h). Scanning Electronic Microscopy (SEM) technique was also used to investigate the effect of elevated temperature on the degradation mechanism of the GFRP bars. The results showed that increasing the temperature level affected the resin matrix surrounding the glass fibers and consequently affected the bond between the fibers and the matrix.

Original languageEnglish
Pages (from-to)2265-2271
Number of pages7
JournalComposites Part B: Engineering
Issue number5
Publication statusPublished - Jul 2012
Externally publishedYes


  • A. Glass fibers
  • B. High-temperature properties
  • B. Strength
  • D. Electron microscopy

ASJC Scopus subject areas

  • Ceramics and Composites
  • Mechanics of Materials
  • Mechanical Engineering
  • Industrial and Manufacturing Engineering


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