Materials and Structures

, Volume 49, Issue 3, pp 929–940 | Cite as

Laboratory evaluation of chemical resistance of pultruded GFRP dowels for concrete pavement

  • Mohammadreza Foruzanmehr
  • Mathieu Montaigu
  • Brahim Benmokrane
  • Mathieu Robert
Original Article
  • 208 Downloads

Abstract

This paper presents mechanical, microstructural and physical characterization of glass fibre-reinforced polymer (GFRP) rods used as dowels for concrete pavement exposed to different types of conditionings. Two types of GFRP dowels fabricated with polyester and vinylester resins were studied. GFRP dowels were exposed to different alkaline and saline solutions at 23 °C during 90 days to simulate the effect of the concrete environment. GFRP dowels were also subjected to cyclic freezing and thawing. The measured short beam shear strengths and flexural modulus of elasticity of the GFRP dowels before and after exposure were considered as a measure of the durability performance of the specimens. In addition, Fourier transform infrared spectroscopy, differential scanning calorimetry and scanning electron microscopy were used to characterize the aging effect on the GFRP dowels. The results showed the very high long-term durability of vinylester GFRP dowels exposed to tap water, CaCl2, NaOH and CaOH2 solutions, and to freeze/thaw cycles. On the other hand, the test results have shown that polyester-based GFRP dowels present an uncertain stability in the different environments simulating the field service conditions, due to plasticizing and/or irreversible chemical degradation of the polymer matrix.

Keywords

Durability GFRP dowel Aging Physical properties Mechanical properties Microstructure 

Notes

Acknowledgments

The authors thank the Natural Sciences and Engineering Research Council of Canada (NSERC), the Ministry of Transportation of Quebec (Pavement Division), the Center for Applied Research on Polymers (CREPEC), the Fonds québécois de la recherche sur la nature et les technologies (FQRNT), and Pultrall Inc. for their support.

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Copyright information

© RILEM 2015

Authors and Affiliations

  • Mohammadreza Foruzanmehr
    • 1
  • Mathieu Montaigu
    • 1
  • Brahim Benmokrane
    • 1
  • Mathieu Robert
    • 1
  1. 1.Department of Civil EngineeringUniversity of SherbrookeSherbrookeCanada

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