Utilization of the western juniper (Juniperus occidentalis) in strandboards to improve the decay resistance

Naturally durable wood species such as western juniper (Juniperus occidentalis) are a potential source of bio-based wood preservatives for the improvement of non-durable timber species. This research investigated the durability of southern yellow pine (Pinus sp.) and western juniper lumber or strand...

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Bibliographic Details
Published in:Bioresources 2021-05, Vol.16 (2), p.3886-3894
Main Authors: Pipíška, Tomáš, Cappellazzi, Jed, Leavengood, Scott, Kamke, Frederick A., Presley, Gerald, Děcký, David
Format: Article
Language:English
Subjects:
Brown rot
Cellulose
Decay
Dry density
Drying ovens
Durability
Fungi
Gloeophyllum trabeum
Juniperus occidentalis
Leaves
Lignin
Loam soils
Lumber
Manufacturing
Moisture content
Oil
Panels
Pine
Pinus echinata
Preservatives
Radiation
Strandboard
Strands
White rot
White rot fungi
Wood
Wood preservatives
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Summary:Naturally durable wood species such as western juniper (Juniperus occidentalis) are a potential source of bio-based wood preservatives for the improvement of non-durable timber species. This research investigated the durability of southern yellow pine (Pinus sp.) and western juniper lumber or strandboard. Single layer panels were made with six different types of wood or wood treatments: southern yellow pine, mixed juniper sapwood and heartwood, sapwood, heartwood, sapwood strands impregnated with juniper oil prior to and after panel manufacturing. Panels were fabricated with 560 kg/m3 oven-dry density with 5% of PF resin and 0.5% of wax. Durability testing was performed with the brown rot fungi Gloeophyllum trabeum and Rhodonia placenta and the white rot fungus Trametes versicolor. Internal bond as a crucial parameter of OSB was measured. Tests revealed that juniper heartwood and juniper heartwood strandboards were highly decay resistant, and juniper oil pre- and post-impregnation strandboard manufacture imparted increased resistance to decay against one brown rot fungus, Gloeophyllum trabeum. Juniper strandboard manufactured from non-impregnated strands showed significantly higher internal bond than pine. These results suggest there is excellent potential for manufacturing highly decay-resistant OSB from juniper, especially from heartwood and that juniper oil can increase the durability of juniper sapwood strandboard.
ISSN:1930-2126
1930-2126
DOI:10.15376/biores.16.2.3886-3894