| dc.description.abstract | Belangke bamboo is one type of bamboo that can be used as a substitute for
wood. However, bamboo has a weakness in that it is susceptible to attack by
destructive organisms, so chemical modification is necessary to increase its
strength and durability. The chemical modification is carried out by impregnation
using 5% boric acid. This study aims to analyse the physical and mechanical
properties of bamboo modified with boric acid at various impregnation pressures
and to determine the best impregnation pressure for belangke bamboo
modification. Bamboo laminated were impregnated with boric acid and dried in a
vacuum for 30 minutes, followed by pressure for 30 minutes with pressure
variations of 2 bar, 4 bar, and 6 bar. The bamboo was then oven-dried at 60°C for
24 hours. The bamboo was then tested for physical properties, including WPG,
density, moisture content, water absorption, and thickness expansion. It was also
tested for mechanical properties, including MOE, MOR, and compressive strength.
The results were analysed with a Non-Factorial Completely Randomised Design
(RAL). The results of the physical properties test showed an average WPG value of
15.56 – 16.96%, density of 0.77 – 0.85 g/cm³, moisture content of 8.21 – 8.5%,
water absorption of 15.54 – 39.85%, and thickness expansion of 7.53 – 12.58%.
Mechanical property testing showed average values of MOE 214,214 – 274,935
kg/cm², MOR 1,258 – 1,498 kg/cm², and compressive strength 415 – 531 kg/cm².
The results of the study on the modification of laminated bamboo with boric acid at
various impregnation pressures significantly affected physical properties such as
density, water absorption, and thickness expansion. However, although
compressive strength was also significantly affected, its value decreased, thus not
improving the mechanical properties of the bamboo. Based on the results, the best
score for laminated bamboo is at a pressure of 2 bar. | en_US |
