Effect of Densification and Steam Treatment on the Quality of Laminated Bamboo
摘要
This research is related to the optimization of the amount of epoxy adhesive used in the manufacture of laminated bamboo from curved cross-sectional blades and efforts to homogenize the characteristics of laminated bamboo through the use of bamboo slats that have been compressed by steam treatment. In this study, there were two stages of making laminated bamboo. The first was laminated bamboo without a compression process. Laminated bamboo was made with a target thickness of 5 cm using epoxy adhesive with a glue spread weight of 100 g/m2, 120 g/m2, and 150 g/m2. The second was laminated bamboo from compressed bamboo slats. The bamboo slats were compressed at the ratio of 50% for the bottom, 30% for the middle, and without compression for the upper part. Then the slats were subjected to steam treated at 160 °C for 60 min. The lamination process was carried out with the best amount of glue spread weight in the previous stage. The results showed that based on the value of delamination and shear strength, the use of adhesive with a glue spread weight of 120 g/m2 could be chosen as the optimal mass of adhesive. Laminated bamboo with compression has good adhesive qualities indicated by the absence of delamination and the value of shear strength that meets the standards. The position factor has no significant effect on the value of the density and shear strength of laminated bamboo. The values of density and shear strength were not different or the same between samples made from the bottom, middle, and upper part. This showed that the compression of the bamboo slats at the bottom and middle by 50% and 30% respectively succeeded in making the characteristics of the laminated bamboo uniform.