Determining thermal conductivity of paving materials using cylindrical sample geometry


Journal Article

A testing procedure was developed for determining thermal conductivity k 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 ±0.021 W m-1 °C-1 (±5%) for a k=0.42 W M-1 °C-1. A cylindrical reference sample of ultrahigh molecular weight polyethylene resulted in a thermal conductivity of 0.441±0.022 W m-1 °C-1 (±5.1%) with 95% confidence. Conventional specimens of hot-mix asphalt and portland cement concrete mixtures were tested and yielded k values of 0.896±0.023 W m-1 °C-1 (±2.6%) and 1.719±0.048 W m-1 °C-1 (±2.8%), 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. © 2010 ASCE.

Full Text

Duke Authors

Cited Authors

  • Carlson, JD; Bhardwaj, R; Phelan, PE; Kaloush, KE; Golden, JS

Published Date

  • February 1, 2010

Published In

Volume / Issue

  • 22 / 2

Start / End Page

  • 186 - 195

International Standard Serial Number (ISSN)

  • 0899-1561

Digital Object Identifier (DOI)

  • 10.1061/(ASCE)0899-1561(2010)22:2(186)

Citation Source

  • Scopus