International Journal of Thermophysics

, Volume 33, Issue 8–9, pp 1704–1714 | Cite as

Determination of Moisture Diffusivity as a Function of Both Moisture and Temperature



The effect of moisture and temperature on liquid water transport in porous media was studied. Specimens of autoclaved aerated concrete were subjected to one-sided water penetration in isothermal conditions at temperatures of 20 °C, 40 °C, 60 °C, and 80 °C. After specified time intervals, moisture profiles were determined gravimetrically. The moisture diffusivity was calculated for a particular temperature as a function of moisture content, using an inverse analysis. The results demonstrate the dependence of the moisture diffusivity on the moisture content and the temperature of the samples. The moisture diffusivity for high moisture content can be as much as one order of magnitude greater than for the lowest moisture content studied. The moisture diffusivity was found to increase by as much as a factor of two when the temperature is increased from 20 °C to 80 °C.


Autoclaved aerated concrete Inverse analysis Moisture Moisture diffusivity Temperature 


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© Springer Science+Business Media, LLC 2011

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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