Comparison of the Saturated Salt Solution and the Dynamic Vapor Sorption techniques based on the measured sorption isotherm of barley straw

For Heat, Air and Moisture modelling, one of the most crucial hygrothermal properties of porous construction materials is the sorption isotherm. Current techniques for measuring the sorption isotherm rely on the standardized Saturated Salt Solution (SSS) method which is known to be time consuming. Recently, a device called Dynamic Vapor Sorption was applied on building materials allowing faster measurements but limiting the mass and volume of the sample. As this technique is not yet standardized, an experimental procedure was developed and validated on barley straw. Results were also in good agreement with the measurements from the SSS technique.