Wood Dimensional Changes due to Hygrothermal Behaviour

V.P. de Freitas; João M.P.Q. Delgado; N. Machado

doi:10.4028/www.scientific.net/DDF.365.172

Paper Titles

Mechanical Behavior on Cr Base Steels Surface Treatment
p.148

Implementation and Monitoring of Higroregulated Wall Base Ventilation Systems to Control Rising Damp
p.154

Influence of Mortar Joints on the Moisture Transfer in Layered Materials
p.160

Hygrothermal Material Properties Database
p.166

Wood Dimensional Changes due to Hygrothermal Behaviour
p.172

The Influence of Mn, Zr and Pb Promoters on the Performance of Cu/ZnO/SBA-15 Catalyst for Hydrogenation of CO₂ to Methanol
p.178

Improved Surface Quality by the Process of Vibratory Grinding
p.183

Using the Fractional Advection Dispersion Equation to Improve the Scale Effect in the Sampling Process of Column Tests with Lateritic Soils
p.188

Application of Artificial Neural Network for Prediction of Boride Layer Depth Obtained on XC38 Steel in Molten Salts
p.194

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Wood Dimensional Changes due to Hygrothermal Behaviour

Abstract:

Wood has a strong hygroscopic behaviour, with a strong variation of moisture content and dimension stability caused by modifications of the relative humidity of the surrounding air. The properties that define the behaviour of wood facing temperature and moisture actions were studied in this work. Linear thermal expansion, hygroscopicity, shrinkage (tangential and radial shrinkage coefficient) and hygric expansion were given special attention.An experimental device was designed for testing wood samples, red oak. A series of tests was performed including the determination of hygric expansion coefficient and the definition of the sorption curve. This research made possible the evaluation of dimensional stability of wood in transient conditions of relative humidity.