TECHNICAL NOTE: SUBTERRANEAN TERMITE RESISTANCE OF SMOKED GLUED LAMINATED LUMBER MADE FROM FAST GROWING TREE SPECIES IN INDONESIA
Abstract
Abstract. The purpose of this research was to determine the resistance of smoked glued laminated lumber (glulam) against subterranean termites (Coptotermes curvignathus Holmgren), using Japanese standard JIS K1571-2004. Glulam was made from fast-growing wood species, namely Acacia mangium (mangium), Maesopsis eminii (manii), and Falcataria moluccana (sengon). The glulam was constructed with either the same species for all layers or mangium as the face and back layers and a core layer of manii or sengon. Glulams were smoked for 15 or 30 days using smoke of mangium wood, and glulam preserved with imidacloprid and untreated glulam were prepared for comparative purposes. Mangium smoke was found to predominantly produce acetic acid, cyclobutanol, phenolic compounds, and other polycyclic aromatic hydrocarbons that improved glulam resistance to subterranean termite attack. Smoked glulam had the same resistance to subterranean termites as imidacloprid-preserved glulam and was much more resistant than untreated glulam. Glulam smoked for 15 days had the same resistance as that smoked for 30 days
Keywords: Smoked glulam, Fast-growing tree species, Subterranean termite, GC-MS, preservation.
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