Sena Maulana, Yuarsa Gumelar, Adesna Fatrawana, Muhammad Iqbal Maulana, Wahyu Hidayat, Ihak Sumardi, Nyoman Jaya Wistara, Seung Hwan Lee, Nam Hun Kim, Fauzi Febrianto
The objectives of this study were to evaluate the effects of shelling ratio and resin content on the properties of bamboo oriented strand board (BOSB) from betung (Dendrocalamus asper) and to determine the correlation between the results of dynamic and static bending tests. Strands were steam-treated at 126 ºC for 1 h under 0.14 MPa pressure and followed by washing with 1% NaOH solution. Three-layer BOSB with the core layer perpendicular to the surface was formed with shelling ratios (face:core ratio) of 30:70; 40:60; 50:50; 60:40 and binded with 7% and 8% of phenol formaldehyde (PF) resin with the addition of 1% of wax. The evaluation of physical and mechanical properties of BOSB was conducted in accordance with the JIS A 5908:2003 standard and the results were compared with CSA 0437.0 standard for commercial OSB (Grade O-1). Non-destructive testing was conducted using Metriguard Model 239A Stress Wave Timer which has a wave propagation time from 1 to 9,999 μs and a resolution of 1 μs. BOSB with 8% resin content showed better physical and mechanical properties than those with 7% resin content. The increase of the face layer ratio improved the strength of BOSB in parallel direction to the grain. The results suggested that shelling ratio of 50:50 could be used as a simple way to reduce PF resin requirements from 8% to 7% and to meet the requirements of CSA 0437.0 standard. The results of non-destructive and destructive tests showed a strong correlation, suggesting that non-destructive test can be used to estimate the bending properties of BOSB. © 2019, Korean Society of Wood Science Technology. All rights reserved.
Department of Forest Products, Faculty of Forestry, Bogor Agricultural University, IPB Dramaga Campus, Bogor, 16680, Indonesia; Department of Forestry, Faculty of Agriculture, Lampung University, Jalan Sumantri Brojonegoro 1, Bandar Lampung, 35145, Indonesia; School of Life Sciences and Technology, Bandung Institute of Technology, Jalan Ganesha 10, Bandung, 40132, Indonesia; Department of Forest Biomaterials Engineering, College of Forest and Environmental Science, Kangwon National University, Chuncheon, 24341, South Korea; Forestry Engineering, Faculty of Production and Industrial Technology, Institut Teknologi Sumatera (ITERA), Lampung Selatan, 35551, Indonesia; Faculty of Agriculture, Khairun University, Ternate City, 97721, Nort Maluku, Indonesia
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