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Effect of Moisture Content on Thermal Properties of Porous Building Materials

  • Václav Kočí
  • Eva Vejmelková
  • Monika Čáchová
  • Dana Koňáková
  • Martin Keppert
  • Jiří Maděra
  • Robert ČernýEmail author
TEMPMEKO 2016
Part of the following topical collections:
  1. TEMPMEKO 2013: Selected Papers of the 13th International Symposium on Temperature, Humidity, Moisture and Thermal Measurements in Industry and Science

Abstract

The thermal conductivity and specific heat capacity of characteristic types of porous building materials are determined in the whole range of moisture content from dry to fully water-saturated state. A transient pulse technique is used in the experiments, in order to avoid the influence of moisture transport on measured data. The investigated specimens include cement composites, ceramics, plasters, and thermal insulation boards. The effect of moisture-induced changes in thermal conductivity and specific heat capacity on the energy performance of selected building envelopes containing the studied materials is then analyzed using computational modeling of coupled heat and moisture transport. The results show an increased moisture content as a substantial negative factor affecting both thermal properties of materials and energy balance of envelopes, which underlines the necessity to use moisture-dependent thermal parameters of building materials in energy-related calculations.

Keywords

Building envelopes Climatic conditions Energy balance Moisture content Thermal properties 

Notes

Acknowledgements

This research has been supported by the Czech Science Foundation, under Project No. P105/12/G059.

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Copyright information

© Springer Science+Business Media New York 2016

Authors and Affiliations

  1. 1.Department of Materials Engineering and Chemistry, Faculty of Civil EngineeringCzech Technical University in PraguePrague 6Czech Republic

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