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

    GRID grid.10041.34

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

Publisher: Magna Congresos S.L

ISBN: 978-84-09-03294-5

Year of publication: 2017

Type: Conference paper

Export: RIS
Author's full text: lockOpen access editor

Abstract

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.

Bibliographic References

  • Barreira, E., & de Freitas, V. P. (2007). Evaluation of building materials using infrared thermography. Construction and Building Materials, 21(1), 218–224. https://doi.org/10.1016/j.conbuildmat.2005.06.049
  • Borrachero, M. V., Payá, J., Bonilla, M., Monzó, J., Paya, J., Bonilla, M., & Monzo, J. (2008). The use of thermogravimetric analysis technique for the characterization of construction materials. The gypsum case. Journal of Thermal Analysis and Calorimetry, 91(2), 503–509. https://doi.org/10.1007/s10973-006-7739-3
  • Chen, Y., Punati, N., Sinha Ray, S., Yang, L., & Prasad, K. (2017). Thermal failure time of nonloadbearing gypsum board assemblies in standard furnace tests. Applied Thermal Engineering, 127, 1285–1292. https://doi.org/10.1016/j.applthermaleng.2017.08.141
  • Dedesko, S., & Siegel, J. A. (2015). Moisture parameters and fungal communities associated with gypsum drywall in buildings. Microbiome, 3(1), 71. https://doi.org/10.1186/s40168-015-0137-y
  • EN 13279-2. (2014). Gypsum binders and gypsum plasters. Part 2: Test methods.
  • Glass, S. V., & Tenwolde, A. (2009). Review of moisture balance models for residential indoor humidity. 12th Canadian Conference on Building Science and Technology, 231–246. Retrieved from http://dx.doi.org/10.1016/j.buildenv.2011.07.016
  • Karagiannis, N., Karoglou, M., Bakolas, A., & Moropoulou, A. (2016). New Approaches to Building Pathology and Durability, 6. https://doi.org/10.1007/978-981-10-0648-7
  • Kylili, A., Fokaides, P. A., Christou, P., & Kalogirou, S. A. (2014). Infrared thermography (IRT) applications for building diagnostics: A review. Applied Energy. https://doi.org/10.1016/j.apenergy.2014.08.005
  • Lerma, J. L., Cabrelles, M., & Portalés, C. (2011). Multitemporal thermal analysis to detect moisture on a building faade. Construction and Building Materials, 25(5), 2190–2197. https://doi.org/10.1016/j.conbuildmat.2010.10.007
  • Pundir, A., Garg, M., & Singh, R. (2015). Evaluation of properties of gypsum plastersuperplasticizer blends of improved performance. Journal of Building Engineering, 4, 223– 230. https://doi.org/10.1016/j.jobe.2015.09.012