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Frost damage of masonry walls - a hygrothermal analysis by computer simulations

: Sedlbauer, K.; Künzel, H.M.

Fulltext urn:nbn:de:0011-b-681729 (103 KByte PDF)
MD5 Fingerprint: 7c4a897125d0bab06c7da185a94d6a49
Created on: 8.2.2008

Journal of thermal envelope & building science : JTEBS 23 (2000), No.3, pp.277-281
ISSN: 1097-1963
Journal Article, Electronic Publication
Fraunhofer IBP ()

Frost damage occurs especially if damp building elements are subjected to frequent freeze-thaw cycles. The observation that frost damage can also be frequently observed in warmer winters - for example in the winter of 98/99 confirms that one cannot use the outside air temperature level as the only criterion, but that the combination of the number of freeze-thaw cycles in the building element's interior and the moisture content in the material at those times must also be considered. The number of zero crossings on a Celsius scale during each half year of the winter, and the corresponding moisture content profiles were calculated using the PC program WUFI for the example of a calcium silica brick wall construction. The effect of different meteorological conditions on zero crossings and material moisture has been determined using meteorological data measured during several years at the Fraunhofer-Institute for Building Physics (IBP) outdoor testing field. From the results, it is possible to assess the frost damage risk.