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Towards understanding rain infiltration in historic brickwork

Klaas Calle UGent and Nathan Van Den Bossche UGent (2017) 11TH NORDIC SYMPOSIUM ON BUILDING PHYSICS (NSB2017) . In Energy Procedia 132. p.676-681
abstract
Historic masonry walls are typically afflicted with uncertainties and defects which might induce significant rain water infiltrations. Insight in these moisture transport mechanisms in brickwork is important because the moisture content of brickwork is the predominant parameter for damage functions for frost, mold, and corrosion, and also affects heat flux. Given the increased focus on low-energy retrofits, interior insulation is becoming more popular. However, this typically decreases the drying potential of the wall and might consequently induce even more moisture-related pathologies. The insulation causes the exterior surface of the brickwork to be saturated more often, and this renders it possible for a runoff water film to develop during heavy rainfall. Although it is well known that this water film can penetrate through defects in the brickwork, the amount of water that penetrates remains a big question mark. Consequently, this important transport mechanism is typically omitted in hygrothermal simulations of (historical) brickwork. To obtain quantitative information, a series of laboratory tests is conducted. In a test setup a runoff film is applied in combination with a range of air pressure differences on a surface with different types of deficiencies representing imperfections in the facade. In this first phase, as an abstraction of the real saturated masonry construction a PMMA surface was used. The applied runoff film is imposed precisely and the water infiltration rate through the deficiencies is measured gravimetrically. Finally, the laboratory results are analyzed and preliminary linear relations between pressure and infiltration rate are found.
Please use this url to cite or link to this publication:
author
organization
year
type
conference (proceedingsPaper)
publication status
published
subject
keyword
Rain infiltration, Historic masonries, HAM
in
11TH NORDIC SYMPOSIUM ON BUILDING PHYSICS (NSB2017)
series title
Energy Procedia
volume
132
pages
676 - 681
conference name
11th Nordic Symposium on Building Physics (NSB)
conference location
Trondheim, Norway
conference start
2017-06-11
conference end
2017-06-14
Web of Science type
Proceedings Paper
Web of Science id
000426435500113
ISSN
1876-6102
DOI
10.1016/j.egypro.2017.10.005
language
English
UGent publication?
yes
classification
P1
id
8525031
handle
http://hdl.handle.net/1854/LU-8525031
date created
2017-06-26 07:24:20
date last changed
2018-06-18 09:17:10
@inproceedings{8525031,
  abstract     = {Historic masonry walls are typically afflicted with uncertainties and defects which might induce significant rain water infiltrations. Insight in these moisture transport mechanisms in brickwork is important because the moisture content of brickwork is the predominant parameter for damage functions for frost, mold, and corrosion, and also affects heat flux. Given the increased focus on low-energy retrofits, interior insulation is becoming more popular. However, this typically decreases the drying potential of the wall and might consequently induce even more moisture-related pathologies. The insulation causes the exterior surface of the brickwork to be saturated more often, and this renders it possible for a runoff water film to develop during heavy rainfall. Although it is well known that this water film can penetrate through defects in the brickwork, the amount of water that penetrates remains a big question mark. Consequently, this important transport mechanism is typically omitted in hygrothermal simulations of (historical) brickwork. To obtain quantitative information, a series of laboratory tests is conducted. In a test setup a runoff film is applied in combination with a range of air pressure differences on a surface with different types of deficiencies representing imperfections in the facade. In this first phase, as an abstraction of the real saturated masonry construction a PMMA surface was used. The applied runoff film is imposed precisely and the water infiltration rate through the deficiencies is measured gravimetrically. Finally, the laboratory results are analyzed and preliminary linear relations between pressure and infiltration rate are found.},
  author       = {Calle, Klaas and Van Den Bossche, Nathan},
  booktitle    = {11TH NORDIC SYMPOSIUM ON BUILDING PHYSICS (NSB2017) },
  issn         = {1876-6102},
  keyword      = {Rain infiltration,Historic masonries,HAM},
  language     = {eng},
  location     = {Trondheim, Norway},
  pages        = {676--681},
  title        = {Towards understanding rain infiltration in historic brickwork},
  url          = {http://dx.doi.org/10.1016/j.egypro.2017.10.005},
  volume       = {132},
  year         = {2017},
}

Chicago
Calle, Klaas, and Nathan Van Den Bossche. 2017. “Towards Understanding Rain Infiltration in Historic Brickwork.” In 11TH NORDIC SYMPOSIUM ON BUILDING PHYSICS (NSB2017) , 132:676–681.
APA
Calle, K., & Van Den Bossche, N. (2017). Towards understanding rain infiltration in historic brickwork. 11TH NORDIC SYMPOSIUM ON BUILDING PHYSICS (NSB2017) (Vol. 132, pp. 676–681). Presented at the 11th Nordic Symposium on Building Physics (NSB) .
Vancouver
1.
Calle K, Van Den Bossche N. Towards understanding rain infiltration in historic brickwork. 11TH NORDIC SYMPOSIUM ON BUILDING PHYSICS (NSB2017) . 2017. p. 676–81.
MLA
Calle, Klaas, and Nathan Van Den Bossche. “Towards Understanding Rain Infiltration in Historic Brickwork.” 11TH NORDIC SYMPOSIUM ON BUILDING PHYSICS (NSB2017) . Vol. 132. 2017. 676–681. Print.