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    Sorption Isotherms: A Catalog and a Data Base

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    In the catalog, sorption isotherms are plotted for more than 100 materials. Measured sorption values from different sources are put into a data base, and for each set of values the best curve through desorption and adsorption measuring points are fitted using the extended Posnow equation. A page of the catalog shows both data values and a figure with data points and approximated curves. An IBM PC has been used to build up the data base that is stored on a diskette marked SORPTION. The necessary data input and plotting programs for the data base as well as programs for curve fitting of data points are also stored on the diskette. The programs have been discussed in a separate report where the execution of the programs is also described.


    moisture content, relative humidity, sorption isotherms, adsorption, desorption, data base, water vapor transmission, testing

    Author Information:

    Hansen, KK
    Assistant professor, Building Materials Laboratory, The Technical University of Denmark, Lyngby,

    Committee/Subcommittee: C16.30

    DOI: 10.1520/STP22955S