ASBTRACT
JOEL ELPINTA PRANATA TARIGAN. The Physical And Mechanical Properties Of Styrax Wood. Under the supervision of APRI HERI ISWANTO and IRAWATI AZHAR.
The objective of this research was to evaluate of physical and mechanical properties three species of Styrax wood origin from North Tapanuli. Plants age for samples were more than 15 years old. Small clear specimen test based on BS-373 standard for physical properties parameters such as specific gravity, green moisture content and volume shrinkage. Furthermore, the mechanical properties test included of modulus of rupture, modulus of elasticity, compression parallel to grain and hardness. The results showed that according to stem direction, edge section had better properties compared to near pith section. While for base section had better properties than upper section. Based on that specific gravity, all of the Styrax wood in this research was classify into III-IV strength classes. Styrax wood had good dimensional stability, it showed by the tangential and radial ratio value reached of one. According to the mechanical properties, styrax wood was suitable use for raw materials of light consttruction, furniture and handy craft.
Keywords: Styrax wood, Durame, Bulu, Toba
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ABSTRAK
JOEL ELPINTA PRANATA TARIGAN. Sifat Fisis dan Mekanis Kayu Kemenyan (Styrax sp.). Dibimbing oleh APRI HERI ISWANTO dan IRAWATI AZHAR.
Tujuan penelitian ini adalah untuk mengevaluasi sifat fisis dan sifat mekanis tiga jenis kayu Kemenyan dari Tapanuli Utara. Pohon yang dijadikan sampel berumur lebih dari 15 tahun. Contoh uji bebas cacat diuji berdasarkan standar BS-373 yang terdiri dari parameter sifat fisis kayu seperti berat jenis, kadar air segar dan penyusutan volume serta parameter untuk sifat mekanis kayu yang meliputi keteguhan patah (MOR), kekakuan (MOE), tekan sejajar serat dan kekerasan. Hasil penelitian menunjukkan bahwa menurut arah horizontal batang, bagian tepi lebih bagus dibandingkan bagian dekat empulur. Sementara menurut arah vertikal batang, bagian pangkal lebih bagus daripada bagian ujung. Berdasarkan berat jenisnya, semua jenis kayu kemenyan diklasifikasikan ke dalam kelas kuat III-IV. Kayu kemenyan memiliki stabilitas dimensi yang baik, dilihat dari nilai perbandingan penyusutan tangensial dan radial mencapai satu. Berdasarkan sifat mekanisnya, kayu kemenyan cocok digunakan sebagai bahan baku konstruksi ringan, mebel dan kerajinan tangan.
Kata Kunci: Kayu Kemenyan, Durame, Bulu, Toba
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