International Journal of Thermophysics

, Volume 35, Issue 9–10, pp 1912–1921 | Cite as

Theoretical and Experimental Analysis of Moisture-Dependent Thermal Conductivity of Lightweight Ceramic Bricks

  • Zbyšek Pavlík
  • Lukáš Fiala
  • Miloš Jerman
  • Eva Vejmelková
  • Milena Pavlíková
  • Martin Keppert
  • Robert Černý
Article
First Online:
Received:
Accepted:

Abstract

The moisture-dependent thermal conductivity of two types of lightweight ceramic brick body is analyzed using both theoretical and experimental approaches. The basic physical properties are determined at first. Then, an impulse method is applied for the thermal-conductivity measurement. Initially, the material samples are dried, after that, they are exposed to liquid water for specific time intervals, and finally the moisture content is allowed to homogenize within the whole volume. The thermal-conductivity measurement is performed for different moisture contents achieved in this way. In the theoretical part, the homogenization principles are used for the calculation of the moisture-dependent thermal conductivity, utilizing the distribution functions based on the pore-size distribution measurement. Finally, a comparison of the measured and calculated data is done, and the validity of the applied effective media treatment is assessed.

Keywords

Distribution functions Effective media theory Impulse method Lightweight ceramic brick body Moisture  Thermal conductivity 
This is a preview of subscription content, log in to check access.

Notes

Acknowledgments

This study has been financially supported by the Ministry of Education, Youth and Sports of the Czech Republic, under Project No. MSM: 6840770031.

References

  1. 1.
    B.P. Jelle, Energy Build. 43, 2549 (2011)CrossRefGoogle Scholar
  2. 2.
    R. Černý, J. Maděra, J. Poděbradská, J. Toman, J. Drchalová, T. Klečka, K. Jurek, P. Rovnaníková, Cem. Concr. Res. 30, 1267 (2000)Google Scholar
  3. 3.
    D.R. Lide (ed.), CRC Handbook of Chemistry and Physics, 79th edn. (CRC Press, Boca Raton, FL, 1998)Google Scholar
  4. 4.
    T. Vrána, F. Björk, Const. Build. Mater. 22, 2335 (2008)CrossRefGoogle Scholar
  5. 5.
    B.M. Suleiman, J. Test. Eval. 39, 529 (2011)Google Scholar
  6. 6.
    S. Rudtsch, High Temp.-High Press. 32, 487 (2000)Google Scholar
  7. 7.
    V. Vretenar, L. Kubicar, V. Bohac, P. Tiano, Int. J. Thermophys. 28, 1522 (2007)CrossRefADSGoogle Scholar
  8. 8.
    P. Fang, P. Mukhopadhyaya, K. Kumaran, C.J. Shi, J. Test. Eval. 39, 210 (2011)Google Scholar
  9. 9.
    M. Jiřičková, Z. Pavlík, L. Fiala, R. Černý, Int. J. Thermophys. 27, 1214 (2006)CrossRefADSGoogle Scholar
  10. 10.
    E. Mnahončáková, M. Jiřičková, Z. Pavlík, L. Fiala, P. Rovnaníková, P. Bayer, R. Černý, Int. J. Thermophys. 27, 1228 (2006)CrossRefADSGoogle Scholar
  11. 11.
    Z. Pavlík, L. Fiala, E. Vejmelková, R. Černý, Int. J. Thermophys. doi: 10.1007/s10765-012-1183-3.
  12. 12.
    K. Ueoka, S. Miyauchi, Y. Asakuma, T. Hirosawa, Y. Morozumi, H. Aoki, T. Miura, Int. J. Hydrogen Energy 32, 4225 (2007)CrossRefGoogle Scholar
  13. 13.
    B.X. Wang, L.P. Zhou, X.F. Peng, Int. J. Heat Mass Transf. 46, 2665 (2003)CrossRefMATHGoogle Scholar
  14. 14.
    B.B. Mandelbrot, The Fractal Geometry of Nature (W.H. Freeman Press, San Francisco, CA, 1982)MATHGoogle Scholar
  15. 15.
    R. Pitchumani, S.C. Yao, J. Heat Transf. 113, 788 (1991)CrossRefGoogle Scholar
  16. 16.
    O. Zmeškal, P. Štefková, L. Dohnalová, R. Bařinka, Int. J. Thermophys. doi: 10.1007/s10765-012-1196-y.
  17. 17.
    M. Pavlíková, Z. Pavlík, M. Keppert, R. Černý, Const. Build. Mater. 25, 1205 (2011)CrossRefGoogle Scholar
  18. 18.
    M. Jiřičková, Application of TDR Microprobes, Mini-tensiometry, and Minihygrometry to the Determination of Moisture Transport and Moisture Storage Parameters of Building Materials (CTU Press, Prague, 2004)Google Scholar
  19. 19.
    O. Koronthályová, P. Matiášovský, in Proceedings of Thermophysics 2007 (STU Bratislava, 2007), pp. 100–106.Google Scholar
  20. 20.
    Z. Pavlík, E. Vejmelková, L. Fiala, R. Černý, Int. J. Thermophys. 30, 1999 (2009)CrossRefADSGoogle Scholar
  21. 21.
    D.J. Bergman, Phys. Lett. 43, 377 (1978)MathSciNetGoogle Scholar
  22. 22.
    A.V. Goncharenko, Phys. Rev. E 68, 041108 (2003)CrossRefADSGoogle Scholar
  23. 23.
    D.A.G. Bruggemann, Berechnung verschiedener physikalischer Konstanten von heterogenen Substanzen. I. Dielectrizitátkonstanten und Leitfähigkeiten der Mischkörper aus isotropen Substanzen. Ann. Phys. 24, 636 (1935)CrossRefGoogle Scholar
  24. 24.
    R. Černý, Measurement 42, 329 (2009)CrossRefGoogle Scholar
  25. 25.
    O. Wiener, in Abhandlungen der Mathematischen-Physischen Klasse der Königlichen Sächsischen Gesellschaft der Wissenschaften, vol 32, p. 509 (1912).Google Scholar
  26. 26.
    Z. Hashin, S. Shtrikman, J. Appl. Phys. 33, 3125 (1962)CrossRefMATHADSGoogle Scholar

Copyright information

© Springer Science+Business Media New York 2012

Authors and Affiliations

  • Zbyšek Pavlík
    • 1
  • Lukáš Fiala
    • 1
  • Miloš Jerman
    • 1
  • Eva Vejmelková
    • 1
  • Milena Pavlíková
    • 1
  • Martin Keppert
    • 1
  • Robert Černý
    • 1
  1. 1.Department of Materials Engineering and Chemistry, Faculty of Civil EngineeringCzech Technical University in PraguePrague 6Czech Republic

Personalised recommendations