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Development of Arc-laminated Bamboo Lumber

Juanito P. Jimenez, Jr.* and Robert A. Natividad

Department of Science and Technology (DOST)
Forest Products Research and Development Institute (FPRDI)
College 4031 Los Baños, Laguna, Philippines

*Corresponding author: This email address is being protected from spambots. You need JavaScript enabled to view it.
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ABSTRACT

This study was conducted to develop arc-laminated bamboo lumber (ALBL) from bamboo splits using middle portions of the culms of Kauayan-tinik (Bambusa blumeana Schult.f.) and Bolo [Gigantochloa levis (Blanco) Merr.]. Arc lamination of quarter split culm was employed instead of the rectangular machined bamboo slats. Polyvinyl acetate (PVAc) and polyurethane (PUR) adhesives with glue spreads of 80, 120, and 160 g/m² were used. Mechanical press with an arc mold was used in the lamination. Conditioned laminated samples were tested following ASTM and PNS procedures. In general, the arc-laminated B. blumeana had better physical properties than G. levis as shown by the former’s lower radial and tangential swelling in both PVAc and PUR adhesives regardless of glue spread. The mechanical properties and delamination tests showed that best glue spread is 80 g/m² for both bamboo species. This implies that glue spread can be lowered up to 80 g/m² for ALBL to reduce glue consumption.

 

INTRODUCTION

Bamboo is known as the “poor man’s timber”. This is due to its ready availability in the rural areas and its diverse traditional uses for structural and non-structural applications. Round poles can be used for housing or building components such as columns, posts, and beams.  When cut lengthwise into half, it can be used to create doors, walls, windows, shelves, or counters. Cut into slats, it is useful for flooring.  It can also be woven into mats for walls and ceilings.  Likewise, the poles in round, halved, crushed, slat, and strip forms can be used for making furniture and handicrafts (Espiloy et al. 2007, Razal & Palijon 2009). . . . read more


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