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Moisture diffusivity of building materials from water absorption measurements

Kumaran, M. K.
1999
Journal of Thermal Envelope and Building Science, v 22, n ., p 349-355

Kumaran, M. K., (1999), "Moisture diffusivity of building materials from water absorption measurements", Journal of Thermal Envelope and Building Science, v 22, n ., p 349-355.
Abstract:
Moisture diffusivity is a transport property that is frequently used in the hygrothermal analysis of building envelope components. This property is dependent on the local moisture content. The experiments that lead to the detailed information on the dependence of diffusivity on moisture content are often very sophisticated. However, two recent exercises, as a part of the activities of an International Energy Agency Annex, have shown that a correct estimate of the magnitude of the moisture diffusivity can provide useful information with regard to its application in hygrothermal analysis. This technical note presents results from a simple moisture absorption measurement that led to a good estimate of the moisture diffusivity of building materials. Results from measurements on a sample of spruce are presented.
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Author Information and Other Publications Notes
Kumaran, M. K.
Building Performance Laboratory, Institute for Research in Construction, National Research Council Canada
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  12. Final Report, IEA-Annex 24, Task 3: Material Properties
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  15. In-Situ performance evaluation of exterior insulation basement systems (EIBS) - spray polyurethane foam: summary report
  16. MEWS methodology for developing moisture management strategies: application to stucco-clad wood-frame walls in North America
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  20. On implementing experimental biological damage-functions models in durability assessment systems
  21. Prediction of moisture response of wood frame walls using IRC's advanced hygrothermal model (hygIRC)
  22. Protecting the long-term performance of building envelope components
  23. Report from Task 4 of MEWS Project - Environmental Conditions, Final Report
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  26. Three-dimensional analysis of thermal resistance of exterior basement insulation systems (EIBS)
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