| Abstrak/Abstract |
The development of bamboo as a raw material for construction materials has drawbacks, including lowphysical properties. Therefore, this work aimed to determine the physical and mechanical properties oflaminated boards modified with citric acid, boric acid, and polystyrene. In addition, the study analysedthe optimum immersion time and the phenomenon of the modifications provided. Two-stepconditions were designed for the immersion of bamboo lamina. The first steps were prepared atdifferent variation times (6, 12, and 24 h). The effect of variation time was evaluated to obtain theoptimum duration treatment of bamboo lamina. Then, another step of bamboo lamina wasimmersion for different solutions (citric acid, boric acid, and polystyrene) at an immersion time of 6 h.The bamboo lamina was assembled into laminated boards (3 layers) measuring 30 cm × 15 cm ×1.5 cm (length × width × thickness) using isocyanate adhesive with adhesive spread level of 280 g/m2using the double adhesive spread technique. The physical and mechanical properties of the laminatedboard were tested according to the JAS 234:2003 standard. The laminated board modified withpolystyrene has higher density, lower delamination, higher shear strength, and higher modulus ofelasticity (MOE) and modulus of rupture (MOR) than that modified with citric acid and boric acid. Inaddition, the bamboo laminated with 6 h and polystyrene immersion has density, moisture content,delamination, MOE, and MOR that meet the JAS 234:2003 standard. These phenomena are due tochanges in the functional group and crystallinity of bamboo laminated after immersion. |
