Analysis of the measurement of moisture within previously wet gypsum sample in relation to the measured temperature on its surface using infrared thermography

  1. José Manuel Alonso López 1
  2. Francisco Javier Gutiérrez García 1
  3. Sergio González Díaz
  4. Marcos Frías García 1
  5. Eduardo González Díaz 1
  1. 1 Universidad de La Laguna
    info

    Universidad de La Laguna

    San Cristobal de La Laguna, España

    ROR https://ror.org/01r9z8p25

Actes:
International Congress on Construction and Building Research (4º.2017. La Laguna)

Editorial: Magna Congresos S.L

ISBN: 978-84-09-03294-5

Any de publicació: 2017

Tipus: Aportació congrés

Text complet de l'autor/a: lock_openAccés obert editor

Resum

The available moisture at a material surface hasbeen identified as most relevant to fungal growth.Infrared thermography is a non-destructive testingtechnology that can be applied to determinevariations in a material’s surface moisture. As waterevaporation is an endothermic reaction, whichinduce local surface cooling, the measure of thesuperficial temperature during evaporation processcan be used to detect the presence of moisture.Therefore, infrared thermography can provideinsight on those conditions that could lead to fungalproliferation. This research presents a laboratorytest, which compare the thermal images obtainedduring the drying process of a gypsum specimenwith respect to the thermal images of other gypsumspecimen without pre-wetting, which was used as areference. The temperature values obtained with thethermal imaging camera were also compared withthe temperature values measured by a device withtwo channels: in-situ probe inside the gypsum andambient probe. The results show that a relationshipexist between the moisture measured by the probeinside the gypsum specimen and the image of thewater level detected thermographically.

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