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Thermal Properties of a Concrete Aerogel Paste Composite

[+] Author Affiliations
Chris J. Kobus, J. David Schall

Oakland University, Rochester, MI

Paper No. IMECE2018-88660, pp. V08AT10A053; 5 pages
doi:10.1115/IMECE2018-88660
From:
  • ASME 2018 International Mechanical Engineering Congress and Exposition
  • Volume 8A: Heat Transfer and Thermal Engineering
  • Pittsburgh, Pennsylvania, USA, November 9–15, 2018
  • Conference Sponsors: ASME
  • ISBN: 978-0-7918-5211-8
  • Copyright © 2018 by ASME

abstract

This paper details the design of an experiment to indirectly measure the thermal conductivity, k, of prototype samples consisting of various mixtures of aerogel and concrete for the purpose of better insulative value and lighter weight. A “hot box” apparatus was designed based on ASTM C1363. It was constructed primarily out of 2” rigid extruded polystyrene insulation and designed to force the majority of the heat generated in the enclosure through the concrete composite test samples. Several samples with well documented k values were tested to calibrate the apparatus. After calibration, three prototype aerogel composite samples were tested. The results showed that the higher the ratio of aerogel to concrete yielded a lower thermal conductivity as would be expected. The sample with no aerogel yielded a k-value of 0.0936 Btu/hrft°F, whereas a sample with 1.5 parts of aerogel-to-concrete mix yielded a 0.0488 Btu/hrftoF k-value. The average uncertainty is ± 28.8%. This is a first step in determining the feasibility of this unique composite concrete mix into new and existing construction.

Copyright © 2018 by ASME

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