Moisture in building materials, particularly in cultural heritage structures, can cause reduction in mechanical strength, decrease in indoor comfort and alteration of thermal properties, aesthetic decay, and even material loss. To non-invasively quantify moisture content in porous materials, Active Infrared Thermography was used. The method was applied in the laboratory on brick sample with different moisture contents, as well as on a reference stone sample with known thermophysical properties, to evaluate thermal inertia as a function of water content using a comparative approach. A heat flux was applied to the sample using a lamp, and thermal inertia was derived from the absorbed heat, influenced by the material’s absorption coefficient. An indirect optical calibration enables estimation of this coefficient without applying high-emissivity or high-absorption coatings, preserving the integrity of sensitive heritage materials.
Active IR Thermography for Assessing Moisture Content in Porous Building Materials: Application of the Thermal Inertia Method
Guolo, Erika
;Bison, Paolo;Ferrarini, Giovanni;Peron, Fabio
2025-01-01
Abstract
Moisture in building materials, particularly in cultural heritage structures, can cause reduction in mechanical strength, decrease in indoor comfort and alteration of thermal properties, aesthetic decay, and even material loss. To non-invasively quantify moisture content in porous materials, Active Infrared Thermography was used. The method was applied in the laboratory on brick sample with different moisture contents, as well as on a reference stone sample with known thermophysical properties, to evaluate thermal inertia as a function of water content using a comparative approach. A heat flux was applied to the sample using a lamp, and thermal inertia was derived from the absorbed heat, influenced by the material’s absorption coefficient. An indirect optical calibration enables estimation of this coefficient without applying high-emissivity or high-absorption coatings, preserving the integrity of sensitive heritage materials.File | Dimensione | Formato | |
---|---|---|---|
proceedings-129-00012.pdf
accesso aperto
Descrizione: paper
Tipologia:
Versione Editoriale
Licenza:
Creative commons
Dimensione
485.81 kB
Formato
Adobe PDF
|
485.81 kB | Adobe PDF | Visualizza/Apri |
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.