Upright capillary absorption behavior of five important timbers and one bamboo species of Bangladesh
M A Islam, A K M A Bosunia, A K Saha, A K Lahiry
The upright or vertical capillary absorption rate of five different timber and bamboo species namely mango (Mangifera indica), kalajam (Syzygium cumini), kanthal (Artocarpus heterophyllus), sissoo (Dalbergia sissoo), mahagoni (Swietenia macrophylla) and mulibamboo (Melocana baccifera) were measured in relation to their specific gravity and duration of immersion. It has been observed that there was significant relation between increase of capillarity and timber species. From the analysis of data it was found that the rise of capillarity is more or less similar in case of bamboo, jam and kanthal but the values were comparatively lower than that of mahagoni, sissoo and mango. The value of the capillarity has been found the highest in mangowood. There was no significant relation with the rise of capillarity and advancement of time. Initially, the soaking rate of bamboo has increased at an increasing rate, but it soaks the solution at more or less same rate with time. It has been also observed that the absorption height has changed with the specific gravity of wood and absorption height has increased gradually with the increase of immersion time.
Keywords: Capillarity, absorption, preservation, hardwoods and bamboo