MASSIJAYA, Muh. YUSRAM, Indonesia

• Jurnal Ilmu dan Teknologi Hasil Hutan Vol. 1 No. 1 (2008): Jurnal Ilmu Teknologi Hasil Hutan - Articles
  

  Glued-laminated (glulam) beams is one of engineered wood products used for structural applications.  The objective of this research is to evaluate characteristics of glulam beams made from Acacia mangium Willd.    Laminations used were 2, 4, 6, 8 and 12 cm in widthnesses, 2 cm in thickness and 260 cm in length.  Each lamination was graded using Machine Stress Grading (namely by Panter or plank sorter) to determine the modulus of elasticity (MOE) value.  The glulam beams was 6 cm x 12 cm in five types of cross-section which arranged by various widths and those MOE of laminations.  Glulam beams were bonded by water based polymer isocyanate (WBPI) using 280 g/m² double glue spread.  The research results showed that glulam beams made from A. mangium Willd.  fulfilled the JAS 234:2003 standard as on following properties: moisture content, MOE, MOR, shear strength and immersion delamination test.  However, performance of glulam was unsatisfactory in wood failure ratio and boiling water soak delamination test.

   

  Keywords:  Glulam beam, MOE, MOR, shear strength, delamination

  
  Abstract  PDF
• Jurnal Ilmu dan Teknologi Hasil Hutan Vol. 1 No. 1 (2008): Jurnal Ilmu Teknologi Hasil Hutan - Articles
  The objective of this research is to evaluate the characteristic of  composite board made from coconut fibre, recycled polypropylene (RPP), and bamboo matting layers. The board samples target density was 0,70 g/cm3. The board construction type was core type composite board (three layers).  Coconut fiber and RPP were used as core, and bamboo matting was used as face and back layers. RPP was used 50% based on coconut fiber oven dry weight. The bamboo sheet wide is 1 cm and 2 cm, with and without bark. The bamboo matting layers were used in slope (45˚) and perpendicular (0/90˚) orientation to length of the board. The research results showed that utilization of bamboo matting layers increase the mechanical properties of board. All of composite board made from coir, RPP, and bamboo matting layers fulfill  the JIS A 5908 standard in density, thickness swelling after 24 hours of water immersions, and screw holding power. Only composite boards with bamboo matting layers with bark, sheet wide 1 cm, and perpendicular orientation to length of the board fulfill JIS A 5908 1994 standard for veneered particleboard in MOE.  However, application of bamboo matting layers without bark is adviced better because more efficient in the raw material using.   Keywords:               Composites board, coconut fiber, recycled polyprophylene, bamboo matting layers
  Abstract  PDF