Effect of steam treatment on the properties of hybrid oriented strand board made from Mangium wood (Acacia mangium Willd.) and Betung bamboo (Dendrocalamus asper (Schult.F) Backer ex. Heyne) strands

다국어 초록 (Multilingual Abstract)

The objective of this study was to evaluate the physical and mechanical properties of mangium wood and betung bamboo hybrid oriented strand board (OSB) with steam treatment. Mangium (Acacia mangium Willd.) and betung bamboo (Dendrocalamus asper (Schult.F) Backer ex. Heyne) strands were steamed at 126ºC temperature and 0.14 MPa pressure for 1 hour. Hybrid OSB with 30 × 30 × 0.9 cm³ size and 0.7 g.cm-3 target density were prepared from mangium strands as face layers and bamboo strands as core layer. Phenol formaldehyde adhesive content of 8% and shelling ratio of 25/50/25 were used. The evaluation of hybrid OSB properties were refering to the JIS A 5908-2003 standard. The results showed that the steam treatment improves the physical and mechanical properties of the resulting OSB hybrids. Observed physical and mechanical properties of hybrid OSB meet the requirements of CSA 0437.0 (Grade O-1) standard. Steam treatments reduce the hemicellulose and extractives content of mangium and betung bamboo strands.