Physical and mechanical properties of flakeboard produced from recycled CCA-treated wood

Chromated copper arsenate (CCA) treated wood has been most widely used in North America since the 1970s for many exterior applications such as decks, fences, playground equipment, utility poles, and others. A large volume of CCA-treated wood is currently coming out of service. Traditional disposal m...

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Bibliographic Details
Published in:Forest products journal 2004-02, Vol.54 (2), p.89-94
Main Authors: Li, W, Shupe, T.F, Hse, C.Y
Format: Article
Language:English
Subjects:
analysis of variance
Applied sciences
Arsenic
bending strength
bonding properties
brown-rot fungi
Chemical properties
chromated copper arsenate
composite wood products
decay resistance
Environmental aspects
Exact sciences and technology
flakeboards
flakes
Forest products industry
internal bond (IB) strength
linear expansion
Lumber
Mechanical properties
modulus of elasticity
modulus of rupture
Particleboard
Physical properties
Pinus
Polymer industry, paints, wood
preservative treated wood
Properties
Protection and preservation
Ratios
Recycling
Statistical analysis
strength (mechanics)
Studies
swelling (materials)
thickness
waste utilization
white-rot fungi
Wood
Wood composites
Wood preservatives
wood products
wood quality
wood utilization
Wood waste
Wood-based materials
Wood. Paper. Non wovens
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Summary:Chromated copper arsenate (CCA) treated wood has been most widely used in North America since the 1970s for many exterior applications such as decks, fences, playground equipment, utility poles, and others. A large volume of CCA-treated wood is currently coming out of service. Traditional disposal methods such as landfilling and incineration are not without adverse environmental outcomes. Recycling CCA-treated wood into composite products is one alternative to ease the disposal problem. In this study, the effects of different ratios of recycled CCA-treated wood and untreated virgin wood on flakeboard properties were compared. The mechanical, physical, and decay resistance properties of flakeboards manufactured from five different ratios of recycled CCA-treated wood and untreated virgin southern pine wood were investigated. The ratios were 100:0, 75:25, 50:50, 25:75, and 0:100. The median ratio with 50 percent of CCA-treated wood and untreated wood was found to be the optimum combination. In this case, residual CCA level was sufficient enough to prevent substantial weight losses in the decay tests, but low enough so that panel mechanical and physical properties were not substantially reduced.
ISSN:0015-7473
2376-9637