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Proceedings Paper

Heat transfer mechanisms in fiber-reinforced polymer composites bonded to concrete
Author(s): Jeff Brown; Rebecca Baker; Lisa Kallemeyn
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Paper Abstract

This research project investigated heat transfer mechanisms that occur during radiant heating of glass/epoxy composites bonded to concrete. The ultimate goal is to develop a field procedure for estimating the thickness of fiber-reinforced polymer (FRP) composites used to strengthen existing reinforced concrete structures. Thickness is an important parameter in the design and implementation of nondestructive testing procedures that evaluate bond in FRP systems. Four concrete samples (15 cm x 30 cm x 5 cm) were constructed with glass/epoxy composite bonded to the surface. The thickness of the composite varied from 1mm to 4mm and thermocouples were placed at 1mm intervals through the depth of the composite. Experimental data was compared with a simple theoretical model that predicts the surface temperature response of a layered system subjected to a uniform heat flux. Two factors were shown to significantly influence the heat transfer mechanism: surface absorptivity of the FRP composite and convective cooling. Additional analytical modeling using the finite element method was performed to account for these affects in an effort to obtain a better estimate of FRP thickness based on experimental data.

Paper Details

Date Published: 9 April 2007
PDF: 9 pages
Proc. SPIE 6541, Thermosense XXIX, 65410Q (9 April 2007); doi: 10.1117/12.715738
Show Author Affiliations
Jeff Brown, Hope College (United States)
Rebecca Baker, Hope College (United States)
Lisa Kallemeyn, Hope College (United States)

Published in SPIE Proceedings Vol. 6541:
Thermosense XXIX
Kathryn M. Knettel; Vladimir P. Vavilov; Jonathan J. Miles, Editor(s)

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