Pengaruh Bagian Kayu dan Ketebalan Stiker pada Pengeringan Alami terhadap Sifat Fisika Kayu Gerunggang (Cratoxylon arborescens Bl.)

Gimson Luhan, M. Damiri, Herwyn Joni, Yanciluk, dan Ahmad Mujaffar


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drying, wood parts, physical properties, gerunggang.


The existence of the wood needs to be considered so that the use of wood for a particular
use needs to pay attention to the quality of wood, both for wood for building materials,
furniture, panels, crafts and so on. The weakness of wood compared to substitutes such
as metal and concrete is its hygroscopic nature. The aim of this study was to determine
the effect of wood parts treatment on axial direction and sticker thickness on natural
drying time on changes in the physical properties of gerunggang wood (Cratoxylon
arborescens Bl.). While the expected benefits are as information material for the wood
processing industry and wood users to be able to dry the wood properly. The research
was conducted at the Forest Products Technology Laboratory for 3 months. Cutting is
done by dividing the length of the stem into 3 (three) equal parts in the axial position,
namely the base (a1), middle (a2) and end (a3), each cut length ± 2 m for the board
(example drying test) ) with ± 2 cm thick and ± 15 cm long for example test of moisture
content, specific gravity and shrinkage. The results showed that the average value of
fresh water content, saturated point moisture content, and air dry water content had a
tendency to decrease in value from the base to the end of the stem. The natural drying
time has an average tendency to dry more quickly from the base to the end of the stem,
with drying times ranging from 28-40 days or an average of 33 days. The end of the
wood with a thickness of 3,5 cm sticker dries faster (25 days) with a defect 1 broken
edge. Parts of wood with a sticker thickness of 3,5 cm dries faster than the thickness of
the stickers 2,5 cm and 1,5 cm. The results of measurements of (BJ) density of
gerunggang wood averaged 0,55 including the medium group (BJ 0,4-0,6). Specific
gravity has a tendency to increase in value from the base to the end of the rod with an
uneven pattern including type 3. The tangential and radial direction shrinkage ratio of
1,88 is included in the medium classification, then gerunggang wood can be used for
boards and lightweight construction under the roof, crates, furniture, plywood and
concrete molds. It is recommended to conduct further research on the possibility of using
gerunggang wood for artificial boards.
Keywords: drying, wood parts, physical properties, gerunggang.


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