Automated weighing and moisture sensor system to assess the hygrothermal response of wood sheathing and combined membrane-sheathing wall components

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Proceedings title11th Symposium for Building Physics: Proceedings
Conference11th Symposium for Building Physics, September 26-30, 2002, Dresden, Germany
Pages595604; # of pages: 10
Subjectbuilding system, drying, envelope, heat transfer, mass transfer, moisture and wood product, experiment; Hygrothermal properties; Moisture performance
AbstractA weighing system was devised to conduct drying experiments on wood based products that could be used to compare results with those derived from simulation. The experiments were designed to retrieve data on the change in weight of specimens continuously over time from which the hygrothermal response of the specimens could then be determined. Specimens consisting of saturated wood sheathing board products of approximately 0.8-m by 1-m size and weighing 5-kg, were wrapped in different types of sheathing membrane and subjected to uniform environmental conditions in a climate chamber. A description is provided of the development of the weighing system, requirements for load cells and their calibration as well as technical features of the data acquisition system. Additionally, an example of a typical weight-in-time plot, obtained from one set of experiments, is given and compared to that derived from simulation. Experimental results are also provided that show the moisture content distribution within the sheathing board over time.
Publication date
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
NRC numberNRCC 45696
NPARC number20378721
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Record identifier0326cf82-4f63-4aa4-a960-c912f6b0a561
Record created2012-07-24
Record modified2017-08-17
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