Resistance of Laminated Veneer Lumber (LVL) Produced from Rubberwood, Radiata Pine and Larch Against Subterranean Termites And White Rot Fungi
Journal Title: Current Investigations in Agriculture and Current Research - Year 2018, Vol 3, Issue 1
Abstract
Laminated veneer lumbers (LVLs) were fabricated using rubber wood, radiate pine and larch wood. Solid rubber wood was used to serve as control for comparison purpose. All of the wood samples were exposed to subterranean termites and white rot fungi for durability evaluation. The results showed that rubber wood LVL had the highest resistance against both deterioration agents in comparison to control, confirming that the resistance of non-durable wood species could be improved by converting them into LVL.Improper forest management and the rapid population increment have induced the continuous growing of timber demand and subsequently led to timber resources depletion around the world. The supply of high quality raw timbers with large diameter is declining accompanied by increasing timber price due to the aforementioned matter. Rising timber costs had shifted the manufacturer’s attention from solid sawn wood to engineered wood products, for example, laminated veneer lumber (LVL). In order to attain better compression and higher strength of LVL products, wood with lower range of densities are often being used. In US, LVL has been typically constructed from southern pines, western softwoods and yellow poplar [1], while in the case of Malaysia, rubber wood are the most common used materials owing to its readily availability. Never the less, one of the disadvantages of these low density wood species is their poor durability against deterioration agents such as termites and fungi. Therefore, better durability could be anticipated by converting these low density wood into LVL bonded by phenol formaldehyde (PF) resin as PF resin has long been recognized as an effective way to enhance the wood properties [2,3]. To the author’s knowledge, there is little or no information regarding the resistance of LVLs fabricated form low density hardwood and softwoods such as rubber wood (Hevea brasiliensis), radiata pine (Pinus radiata) and larch (Larix spp.) against both subterranean termites ((Coptotermes curvignathus Holmgren)) and white rot fungi (Pycnoporus sanguineus). Therefore, this study evaluates and compares the biological resistance of LVLs fabricated from rubber wood, radiate pine and larch with that of solid rubber wood
Authors and Affiliations
Paridah Md Tahir, Juliana Abdul Halip, Lee Seng Hua
Keywords
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- EP ID EP571110
- DOI 10.32474/CIACR.2018.03.000153
- Views 95
- Downloads 0
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