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

Daphne Guilbert, Tim De Kock, Veerle Cnudde (UGent) and Nathan Van Den Bossche (UGent)
(2021) 1st International Conference on Moisture in Buildings (ICMB201), Proceedings.
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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.
Keywords
water repellent treatment, historic building materials, water retention, water transport

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MLA
Guilbert, Daphne, et al. “Extensive Study on the Efficiency of a Water Repellent Treatment on Historic Natural Stone, Brick and Mortar.” 1st International Conference on Moisture in Buildings (ICMB201), Proceedings, 2021, doi:10.14293/icmb210025.
APA
Guilbert, D., De Kock, T., Cnudde, V., & Van Den Bossche, N. (2021). Extensive study on the efficiency of a water repellent treatment on historic natural stone, brick and mortar. 1st International Conference on Moisture in Buildings (ICMB201), Proceedings. Presented at the 1st International Conference on Moisture in Buildings (ICMB21), Online (UCL London). https://doi.org/10.14293/icmb210025
Chicago author-date
Guilbert, Daphne, Tim De Kock, Veerle Cnudde, and Nathan Van Den Bossche. 2021. “Extensive Study on the Efficiency of a Water Repellent Treatment on Historic Natural Stone, Brick and Mortar.” In 1st International Conference on Moisture in Buildings (ICMB201), Proceedings. https://doi.org/10.14293/icmb210025.
Chicago author-date (all authors)
Guilbert, Daphne, Tim De Kock, Veerle Cnudde, and Nathan Van Den Bossche. 2021. “Extensive Study on the Efficiency of a Water Repellent Treatment on Historic Natural Stone, Brick and Mortar.” In 1st International Conference on Moisture in Buildings (ICMB201), Proceedings. doi:10.14293/icmb210025.
Vancouver
1.
Guilbert D, De Kock T, Cnudde V, Van Den Bossche N. Extensive study on the efficiency of a water repellent treatment on historic natural stone, brick and mortar. In: 1st International Conference on Moisture in Buildings (ICMB201), Proceedings. 2021.
IEEE
[1]
D. Guilbert, T. De Kock, V. Cnudde, and N. Van Den Bossche, “Extensive study on the efficiency of a water repellent treatment on historic natural stone, brick and mortar,” in 1st International Conference on Moisture in Buildings (ICMB201), Proceedings, Online (UCL London), 2021.
@inproceedings{8717986,
  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.}},
  author       = {{Guilbert, Daphne and De Kock, Tim and Cnudde, Veerle and Van Den Bossche, Nathan}},
  booktitle    = {{1st International Conference on Moisture in Buildings (ICMB201), Proceedings}},
  keywords     = {{water repellent treatment,historic building materials,water retention,water transport}},
  language     = {{eng}},
  location     = {{Online (UCL London)}},
  pages        = {{2}},
  title        = {{Extensive study on the efficiency of a water repellent treatment on historic natural stone, brick and mortar}},
  url          = {{http://doi.org/10.14293/icmb210025}},
  year         = {{2021}},
}
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