Determination of the moisture storage characteristics of porous capillary active materials
With new improved calculation models a good agreement between computed and measured results of moisture transfer is obtainable on condition that correct material properties are used. Especially when capillary active materials are in hygric connection, their moisure storage characteristics have a pre...
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Published in | Materials and structures Vol. 31; no. 8; pp. 522 - 529 |
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Main Authors | , |
Format | Journal Article |
Language | English |
Published |
Dordrecht
Springer Nature B.V
01.10.1998
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Subjects | |
Online Access | Get full text |
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Summary: | With new improved calculation models a good agreement between computed and measured results of moisture transfer is obtainable on condition that correct material properties are used. Especially when capillary active materials are in hygric connection, their moisure storage characteristics have a predominant influence on the moisture behaviour of the building component. In this contribution, a pressure plate method to determine the moisture storage characteristics in the capillary moisture region is presented, which uses water as a measuring medium and thus assures a more realistic description. Furthermore, it is shown how to combine these results with the sorption isotherm, which describes the storage function in the hygroscopic moisture region, to obtain one continuous storage function over the entire moisture region, from dry material up to capillary saturation.Original Abstract: De nouveaux modeles ameliores pour le calcul du transfert de l'humidite permettent d'obtenir des resultats qui correspondent bien aux resultats des essais, a condition de choisir correctement les proprietes des materiaux a etudier. En particulier, lorsque des materiaux ayant une activite capillaire sont en connexion hydrique, leurs caracteristiques de fixation de l'eau jouent un role predominant dans le comportement hydrique d'un element de construction. Dans cet article, on presente une methode utilisant une plaque de succion pour determiner les capacites de fixation de la region capillaire. L'eau est utilisee comme unite de mesure, assurant ainsi une description plus realiste. De plus, on demontre comment combiner ces resultats avec une isotherme de sorption qui decrit la fonction de fixation dans la region hygroscopique, pour determiner la fonction contique et globale de la fixation sur la region en question, dequis l'etat sec du materiau jusqu'a sa saturation capillaire. |
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Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 ObjectType-Article-2 ObjectType-Feature-1 |
ISSN: | 1359-5997 1871-6873 |
DOI: | 10.1007/BF02481533 |