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Volume 4, Issue 8 (September 2007)

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ISSN: 1546-962X
Published Online: 1 September 2007
Page Count: 10

Effects of Drying Conditions, Phase Transformations, and Carbonation Reactions on Measurements of Sorption Isotherms of Building Materials
Wilkes Kenneth, Atchley Jerry, Childs Phillip, Desjarlais Andre

Abstract
The sorption isotherm is one of the basic material properties used in hygrothermal modeling of building envelope performance. Measurement of this property is deceptively simple. Specimens are first dried and then exposed to a series of higher relative humidities to develop a curve of moisture content versus relative humidity at constant temperature. This paper discusses some confounding effects that we have observed while performing measurements on a number of common building materials. Materials studied included gypsum products, wood and wood products, and cementitious materials.



Keywords:
sorption isotherm, gypsum, wood, wood products, cement, hygrothermal properties

Paper ID: JAI100459
DOI: 10.1520/JAI100459
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Author Wilkes Kenneth, Atchley Jerry, Childs Phillip, Desjarlais Andre Title Effects of Drying Conditions, Phase Transformations, and Carbonation Reactions on Measurements of Sorption Isotherms of Building Materials Symposium Heat-Air-Moisture Transport: Measurement on Building Materials, 2006-04-26 Committee C16