Sifat Fisis, Mekanis, dan Keawetan Oriented Strand Board Bambu Andong dan Betung dengan Perlakuan Steam pada Strand
Bamboo resources are abundant in Indonesia and have big potential to be
developed. Compared to wood, has fast growth rate, abundant potency, short cycle,
and adaptable to most of soil types except soil in the beach area. Due to its
advantages, bamboo has been used as raw materials for industry, construction,
furniture, household equipment, and handicrafts. However, bamboo also has some
limitations when they are used for construction material, particularly due to its
diameter. The small diameter and thin culm of bamboo made the solid bamboo
difficult to be used for panel products that generally needed a long and wide
dimensions. Composite products can be used as alternatives to increase the efficient
utilization of bamboo for structural and non-structural applications. Oriented strand
board (OSB) is one of the structural composite panels that has been used as a
substitution for plywood products. The extractive content of bamboo, particularly
the carbohydrates and sugars content is relatively higher than wood. Carbohydrates
and sugars are food sources for wood-damaging agents. Pretreatment on strands
can be applied to solve the problem, such as steam treatment. Therefore, the
objective of this study is to evaluate the properties of B-OSB with and without
steam treatment.
Two bamboo species, i.e. andong (Gigantochloa pseudoarundinacea) and
Betung (Dendrocalamus asper) were obtained from 3-year-old bamboo plantation
in Sukabumi, West Java, Indonesia. Bamboo culms without internodes were
converted into strands. The strands were treated with steam at 126 oC for 1 h under
a pressure 0.14 Mpa. Three-layer B-OSBs were made with the dimension of
30x30x0.9 cm3
and The target board density was 0.7 g cm-3
. Anatomical and
physical properties of solid andong and betung bamboo were analyzed. Strand
geometry was measured using 100 strands that obtained randomly and determined
according to Maloney (1993). Crystallinity and pH of bamboo strand were analyzed
before and after steaming. The extractive content of bamboo strands before and
after steam treatment was analyzed in accordance with TAPPI standards. Samples
were extracted using alcohol-benzene solvent following the procedure of TAPPI T
204 om-88. The physical and mechanical properties of B-OSB were evaluated
according to the procedure of JIS A 5908-2003 (JIS 2003). Durability of OSB
against soil termite were evaluated according to JIS K 1571-2004. Durability of
OSB against subterranean termite were evaluated according to SNI 7207-2014.
This study showed that density of andong bamboo higher than betung
bamboo. Dimensional stability of betung solid bamboo more higher than andong
bamboo. Andong bamboo has type III vascular bundle, while betung bamboo has
type IV. The geometry of strand produced from andong and betung bamboo were
satisfactory, showing high slenderness and aspect ratio. Steam treatment of strands
significantly reduced the extractive content, and thus improved the dimensional
stability, mechanical properties, and durability of bamboo OSB from andong and
betung strands. A simple and relatively low-cost steam treatment of strands offers
a promising alternative treatment to produce bamboo OSB with superior properties.
URI
https://repo.itera.ac.id/depan/submission/SB1902120002
Keyword