Affiliation:
1. School of Life Sciences and Technology, Institut Teknologi Bandung , Jl. Ganesha No. 10 Bandung 40132 , West Java , Indonesia
2. Alumni of Forestry Faculty, University of Winaya Mukti , Jatinangor Sumedang , Indonesia
3. Faculty of Agriculture, Shizuoka University , Ohya 836, Suruga-ku , Shizuoka , 422-8529 , Japan
Abstract
Abstract
The properties of the laminated veneer lumber (LVL) composed of the boiled veneer of Rubberwood (Hevea brasiliensis) using polyvinyl acetate (PVAc) adhesives in various cold-pressing time and various conditioned time with loaded and unloaded were studied. Five-ply LVL was produced by boiling veneer at 100°C for 90 min as pretreatment and cold-pressing time at 12 kgf cm−2 for 1.5, 6, 18, and 24 h then conditioned at 20°C and 65% relative humidity (RH) with loaded (12 kgf cm−2) and unloaded for 7 days as physical treatment. Especially for the delamination test, the specimens were immersed at 70 ± 3°C for 2 h and dried in the oven at 60 ± 3°C for 24 h; then, the specimens were solidified at room temperature (20°C and 65% RH) with loaded (12 kgf cm−2) and unloaded for 7, 10, 12, and 14 days. To determine the performance of LVL, the density, moisture content (MC), delamination, modulus of elasticity (MOE), modulus of rupture (MOR), horizontal shear strength, and formaldehyde emission tests were conducted according to the Japanese Agricultural Standard (JAS 2008) for structural LVL. The MOE and MOR values were significantly influenced by the physical treatment, however, neither to horizontal shear strength nor to formaldehyde emission. The best performance of LVL has resulted from unloaded LVL with cold-pressed time for 18 h; the MOE and MOR values were 9,345.05 ± 141.61 N mm−2 and 80.67 ± 1.77 N mm−2, respectively. The best value of the horizontal shear strength was obtained from the LVL with 18 h cold-pressing time and conditioned with loaded (13.10 ± 1.47 N mm−2) and unloaded (12.23 ± 1.36 N mm−2). The percentage of delamination values decreased with an increase in the cold-pressing time and conditioning time. The lowest value of delamination (19.06%) was obtained from the LVL with 24 h cold-pressing time and conditioned with loaded for 14 days. Except the delamination test, all other properties fulfilled the JAS.
Subject
General Agricultural and Biological Sciences
Reference43 articles.
1. Abdurachman, Hadjib N. The quality of some wood of fast tree growing species for building materials based on mechanical properties. Proceeding of PPI Standardization. Jakarta: National Standardization Body; November 19, 2009. p. 1–11. (in Indonesian).
2. Alamsyah EM. Studies on Bonding Performance of Fast-growing Wood Species from Tropical Plantation Forest. Doctoral Dissertations. Gifu, Japan: Gifu University, United Graduate School of Agricultural Science, Biological Resources Science; 2008. p. 82–88.
3. Andromachi M, Ekaterini R. Adhesive bond performance of heat-treated fir wood (Abies borrissiregis). Wood Res. 2018;63(5):909–16.
4. Arruda LM, Del Menezzi CHS. Properties of a laminated wood composite produced with thermomechanically treated veneers. Adv Mater Sci Eng. 2016;2016:9. 10.1155/2016/8458065, Article ID 8458065. Available at (accessed April 14, 2018).
5. Aydin I. Activation of wood surfaces for glue bonds by mechanical pre-treatment and its effects on some properties of veneer surfaces and plywood panels. Appl Surf Sci. 2004a;233(1):268–74.
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