Effect of varying number of layers on the laminated bamboo properties

English. Bamboo is one of non wood forest product which is well known and multi purpose. To improve the quality and utilization of bamboo, research on laminated bamboo from betung (Dendrocalamus asper) with varying number of layers (2,3,4 and 5) glued with urea forma dehyde was carried out. The results showed that the physical and mechanical properties of laminated bamboo were not effected by the number of layers except its bonding strength based on tensile shear strength in dry test (the tensile shear strength of laminated bamboo increased with increase in number of layers). The bonding properties of laminated bamboo was good enough and met the Japanese Standard requerements for delamination test. Based on the density, static bending strength and compression strength values, the laminated bamboo produced was equal to the wood belongs to strength class II

Indonesian. Bambu merupakan hasil hutan non kayu, banyak dijumpai dan dimanfaatkan untuk berbagai keperluan. Dalam rangka peningkatan mutu dan pemanfaatan bambu untuk bahan bangunan, telah dilakukan penelitian sifat fisis dan mekanis bambu lamina yang dibuat dari bambu betung (Dendrocalamus asper) dengan variasi jumlah lapisan (2,3,4 dan 5 lapisan) yang direkat dengan perekat urea formaldehida cair. Hasil penelitian menunjukkan bahwa sifat fisis dan mekanis bambu lamina dari bambu betung tidak dipengaruhi oleh jumlah lapisan kecuali keteguhan rekat berdasarkan uji geser tarik dalam keadaan kering (makin banyak jumlah lapisan makin tinggi keteguhan tarik). Sifat perekatan bambu lamina dari bambu betung cukup baik dan memenuhi standar Jepang untuk uji delaminasi. Berdasarkan nilai kerapatan, keteguhan lentur statis dan keteguhan tekan, bambu lamina betung setara kayu kelas kuat II