Manufacture of strand board made from construction scrap wood

Published Dat
June 2007, Vol.50(4):415–426, doi:10.1016/j.resconrec.2006.07.002

Author 

• Andi Hermawan ^a
• Takeshi Ohuchi ^b,,
• Ryo Tashima ^a
• Yasuhide Murase ^b

• aGraduate School of Bioresource and Bioenvironmental Sciences, Kyushu University, 6-10-1, Higashi-ku, Fukuoka 812-8581, Japan
• bForest and Forest Products Sciences, Faculty of Agriculture, Kyushu University, Graduate School, 6-10-1, Higashi-ku, Fukuoka 812-8581, Japan

Received 27 January 2006. Revised 22 June 2006. Accepted 5 July 2006. Available online 22 August 2006. 

Abstract

The objective of this research was to evaluate the physical and mechanical properties of strand board made from construction scrap wood. The strand board was manufactured using Sugi (Cryptomeria japonica D. Don) and Douglas-fir (Pseudotsuga japonica) strands selected from construction scrap wood. The strands were oriented, and three-layer (face/core/face) strand board of three types was produced: one in which the strands of the face layer were oriented at a right angle to those of the core layer (R board), another in which the strands of the face layer were oriented parallel to those of the core layer (P board), and a third in which the strands of both layers were oriented at random (Ra board). The physical and mechanical properties of the boards were evaluated based on Japanese Industrial Standard (JIS). The main results obtained are as follows: the bending strength of the strand board with a density larger than 0.55 g/cm³ exceeded the standard value of type 18 particleboard of JIS A 5908. The bending strength of the strand board was affected by board density, strand orientation and resin content, and became larger with increased density as well as resin content. That of the parallel specimen of P board was the largest among the specimen-orientations and types. The internal bond strength of the strand board with a density larger than 0.55 g/cm³ exceeded the standard value of type 18 particleboard and type 24-10 particleboard of JIS A 5908. The internal bond strength was markedly affected by the resin content of the core layer, and became larger with increased density. The thickness swelling of the strand board decreased with increased resin content, and become larger with increased density.

Keywords

Strand board

Construction scrap wood

Bending strength

Internal bond strength

Thickness swelling

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