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      Extensive study on the efficiency of a water repellent treatment on historic natural stone, brick and mortar

      , 1 , 2 , 3 , 4

      1st International Conference on Moisture in Buildings 2021 (ICMB21)

      28-29 June 2021

      water repellent treatment, historic building materials, water retention, water transport

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          Abstract

          In order to reduce water-related weathering of porous building materials, facades are often treated with a water repellent product. The efficacy of this treatment is generally tested in laboratory conditions, but these tests do not allow to grasp or understand the overall impact of the treatment on the hygrothermal behavior of a wall assembly. Therefore, heat-air-moisture (HAM) simulations can help to determine the treatment performance. However, water repellent layers are currently not well defined in HAM simulation programs. For this, three historic materials were extensively tested to determine the characteristics of a water repellent layer. Results show that the velocity of water absorption, 24 hour water uptake, drying speed and the sorption isotherm are, as expected, lower for treated materials. These results can be used to define water repellent layers in HAM simulations more correctly, in order to model their effect more accurately.

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          Author and article information

          Conference
          12 May 2021
          Affiliations
          [1 ] PProGRess, Department of Geology, Ghent University & Building Physics Group, Department of Engineering and Architecture, Ghent University
          [2 ] Antwerp Cultural Heritage Sciences (ARCHES)
          [3 ] PProGRess, Department of Geology, Ghent University & Environmental Hydrogeology group, Department of Earth Sciences, Utrecht University
          [4 ] Building Physics Group, Department of Engineering and Architecture, Ghent University
          Article
          10.14293/ICMB210025
          The Author(s)

          Published under Creative Commons Attribution 4.0 International ( CC BY 4.0). Users are allowed to share (copy and redistribute the material in any medium or format) and adapt (remix, transform, and build upon the material for any purpose, even commercially), as long as the authors and the publisher are explicitly identified and properly acknowledged as the original source.

          1st International Conference on Moisture in Buildings 2021
          ICMB21
          Online
          28-29 June 2021
          Product
          Product Information: ScienceOpen

          The datasets generated during and/or analysed during the current study are available from the corresponding author on reasonable request.

          Engineering

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