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Interlaboratory Comparison of Hygric Properties of Porous Building Materials

Jan Carmeliet

Hugo Hens

K.U. Leuven, Department of Civil Engineering, Kasteelpark Arenberg 51 B-3001 Leuven, Belgium

Olaf Adan

Harold Brocken

TNO Building and Construction Research, P.O. Box 49, 2600 AA Delft, The Netherlands

Robert Cerny

Zbysek Pavlik

Faculty of Civil Engineering, Department of Structural Mechanics, Czech Technical University, Thakurova 7, CZ-16629 Prague 6, Czech Republic

Christopher Hall

Centre for Materials Science and Engineering, University of Edinburgh, The King’s Buildings, Edinburgh EH9 3JL, UK

Kumar Kumaran

National Research Council Canada, Institute for Research in Construction, 1200 Montreal Road, Ottawa ON K1A 0R6, Canada

Leo Pel

Department of Applied Physics, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands

Rudolf Plagge

Institute of Building Climatology, University of Technology Dresden, Zellescher Weg 17, D-1069 Dresden, Germany

The precision of methods used for the determination of hygric properties of porous building materials was investigated. The study was performed in the framework of the EU-initiated HAMSTAD-project. Six laboratories measured the selected hygric properties of three porous building materials. While the most measured properties show acceptable agreement, yet, it was found that some of the existing standards or commonly accepted measurement methods need improvement. Most striking were large variations in the results of the vapour transmission tests performed in accordance to the existing European Standard.

Key Words: hygric properties • interlaboratory comparison • round robin • vapour diffusion test • free water uptake experiment

Journal of Thermal Envelope and Building Science, Vol. 27, No. 4, 307-325 (2004)
DOI: 10.1177/1097196304042119


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