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Hygric properties of porous building materials (VI) : A round robin campaign

Feng, Chi ; Guimarães, Ana Sofia ; Ramos, Nuno ; Sun, Lixin ; Gawin, Dariusz ; Konca, Piotr ; Hall, Christopher ; Zhao, Jianhua ; Hirsch, Hauke and Grunewald, John , et al. (2020) In Building and Environment 185.
Abstract

Hygric properties of porous building materials are important for hygrothermal analysis. Their experimental determination is however not always reliable, shown by the discrepant results from different laboratories on the same materials. In this study, a recent round robin campaign initiated by KU Leuven (Belgium) and participated in by eight institutes from different countries is reported. Ceramic brick was selected as the target material. The bulk density and open porosity from vacuum saturation tests, the capillary absorption coefficient and capillary moisture content from capillary absorption tests, and the vapor permeability from cup tests were measured. Results were analyzed statistically and compared with a previous round robin... (More)

Hygric properties of porous building materials are important for hygrothermal analysis. Their experimental determination is however not always reliable, shown by the discrepant results from different laboratories on the same materials. In this study, a recent round robin campaign initiated by KU Leuven (Belgium) and participated in by eight institutes from different countries is reported. Ceramic brick was selected as the target material. The bulk density and open porosity from vacuum saturation tests, the capillary absorption coefficient and capillary moisture content from capillary absorption tests, and the vapor permeability from cup tests were measured. Results were analyzed statistically and compared with a previous round robin project, EC HAMSTAD. The reproducibility errors for determining the capillary absorption coefficient were noticeably reduced when compared with the EC HAMSTAD project, and the different laboratories in the present study obtained similar results from vacuum saturation tests and capillary absorption tests without a common protocol. For cup tests, large inter-laboratory discrepancies still exist. However, with a stringent common protocol different laboratories achieved consistent results. For all properties a common protocol did not change the average results of all laboratories.

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publishing date
type
Contribution to journal
publication status
published
subject
keywords
Capillary absorption, Hygric property, Porous building material, Round robin, Vacuum saturation, Vapor diffusion
in
Building and Environment
volume
185
article number
107242
publisher
Elsevier
external identifiers
  • scopus:85091899298
ISSN
0360-1323
DOI
10.1016/j.buildenv.2020.107242
language
English
LU publication?
yes
id
3b7e08b2-e7a4-4c4c-8fe5-746722641ca6
date added to LUP
2020-10-30 13:30:37
date last changed
2022-04-19 01:26:51
@article{3b7e08b2-e7a4-4c4c-8fe5-746722641ca6,
  abstract     = {{<p>Hygric properties of porous building materials are important for hygrothermal analysis. Their experimental determination is however not always reliable, shown by the discrepant results from different laboratories on the same materials. In this study, a recent round robin campaign initiated by KU Leuven (Belgium) and participated in by eight institutes from different countries is reported. Ceramic brick was selected as the target material. The bulk density and open porosity from vacuum saturation tests, the capillary absorption coefficient and capillary moisture content from capillary absorption tests, and the vapor permeability from cup tests were measured. Results were analyzed statistically and compared with a previous round robin project, EC HAMSTAD. The reproducibility errors for determining the capillary absorption coefficient were noticeably reduced when compared with the EC HAMSTAD project, and the different laboratories in the present study obtained similar results from vacuum saturation tests and capillary absorption tests without a common protocol. For cup tests, large inter-laboratory discrepancies still exist. However, with a stringent common protocol different laboratories achieved consistent results. For all properties a common protocol did not change the average results of all laboratories.</p>}},
  author       = {{Feng, Chi and Guimarães, Ana Sofia and Ramos, Nuno and Sun, Lixin and Gawin, Dariusz and Konca, Piotr and Hall, Christopher and Zhao, Jianhua and Hirsch, Hauke and Grunewald, John and Fredriksson, Maria and Hansen, Kurt Kielsgaard and Pavlík, Zbyšek and Hamilton, Andrea and Janssen, Hans}},
  issn         = {{0360-1323}},
  keywords     = {{Capillary absorption; Hygric property; Porous building material; Round robin; Vacuum saturation; Vapor diffusion}},
  language     = {{eng}},
  publisher    = {{Elsevier}},
  series       = {{Building and Environment}},
  title        = {{Hygric properties of porous building materials (VI) : A round robin campaign}},
  url          = {{http://dx.doi.org/10.1016/j.buildenv.2020.107242}},
  doi          = {{10.1016/j.buildenv.2020.107242}},
  volume       = {{185}},
  year         = {{2020}},
}