Moisture Transport in Wood-Based Structural Panels under Transient Hygroscopic Conditions

Development of moisture gradients within wood and wood-based composites can result in irreversible moisture-induced damage. Accelerated weathering (AW), generally employing harsh environmental conditions, is a common tool for assessing moisture durability of wood composite products. Use of milder AW...

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Bibliographic Details
Published inForest products journal Vol. 70; no. 3; pp. 283 - 292
Main Authors Way, Daniel, Kamke, Frederick A, Sinha, Arijit
Format Journal Article
LanguageEnglish
Published Madison Forest Products Society 22.09.2020
Subjects
Adhesives
Analysis
Building materials
Chemical properties
Composite materials
Composition
Durability
Environmental aspects
Environmental conditions
Forest products industry
Humidity
Industrial development
Laboratories
Mathematical models
Mechanical properties
Moisture
Parameters
Partial differential equations
Plywood
Relative humidity
Service life
Structure
Wall panels
Weathering
Wood
Wood composites
United States
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Summary:Development of moisture gradients within wood and wood-based composites can result in irreversible moisture-induced damage. Accelerated weathering (AW), generally employing harsh environmental conditions, is a common tool for assessing moisture durability of wood composite products. Use of milder AW conditions, such as cyclic changes in relative humidity (RH), may be of interest to the wood-based composites industry in assessing moisture durability under more realistic conditions. The primary objective of this study was to determine whether moisture profile development in oriented strand board and plywood during cyclic RH changes could be reasonably predicted with a simple moisture transport model, which may be practical for wood-based composite industry members seeking to develop new AW protocols. The diffusion model based on Fick's second law with empirically determined moisture transport parameters fits the experimental data reasonably well for the purpose of screening RH parameters.
ISSN:0015-7473
2376-9637
DOI:10.13073/FPJ-D-20-00012