Determining Thermal Conductivity of Paving Materials Using Cylindrical Sample Geometry
Publication: Journal of Materials in Civil Engineering
Volume 22, Issue 2
Abstract
A testing procedure was developed for determining thermal conductivity using the same cylindrical specimen geometry that is commonly used for standard mechanical property testing. An experimental test apparatus was constructed with a calculated systematic uncertainty of for a . A cylindrical reference sample of ultrahigh molecular weight polyethylene resulted in a thermal conductivity of with 95% confidence. Conventional specimens of hot-mix asphalt and portland cement concrete mixtures were tested and yielded values of and , both at a 95% confidence interval. These results fall within common literature value ranges for these materials, and indicate an acceptable level of accuracy and repeatability for this new test method.
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Acknowledgments
The writers thank the Portland Cement Association (PCA), the American Concrete Pavement Association (ACPA), and the National Center of Excellence on SMART Innovations for Urban Climate and Energy at Arizona State University for sponsoring this research project. This material was based in part on work supported by the National Science Foundation, while one of the writers (P.E.P.) was working at the Foundation. Any opinion, findings and conclusions or recommendations expressed in this material are those of the authors and do not necessarily reflect the views of the National Science Foundation.
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Information & Authors
Information
Published In
Journal of Materials in Civil Engineering
Volume 22 • Issue 2 • February 2010
Pages: 186 - 195
Copyright
© 2010 ASCE.
History
Received: Apr 17, 2008
Accepted: Aug 14, 2009
Published online: Jan 15, 2010
Published in print: Feb 2010
Notes
Note. Associate Editor: Nemkumar Banthia
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