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All Journal BERITA BIOLOGI Jurnal Ilmu dan Teknologi Kayu Tropis PERENNIAL
Djamal Sanusi
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Environmental Science

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SIFAT FISIK DAN MEKANIK KOMPOSIT KAYU SEMEN-SERBUK GERGAJI . Bakri; Endra Gunawan; Djamal Sanusi
PERENNIAL Vol. 2 No. 1 (2006)
Publisher : Forestry Faculty of Universitas Hasanuddin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24259/perennial.v2i1.153

Abstract

This research aims to find out the effect of cement-saw dust ratio levels on the physical and mechanical properties of produced composites. The physical properties (density, water content, water absorption after the immersion of one hour and 24 hours, and thickness swelling after the immersion of one hour and 24 hours) and mechanical properties (MOE and MOR) were observed according to ISO standards. The results showed that the use of the cement to sawdust ratio of 3 : 1 in producing wood composite with the target density of 1200 kg/m3 resulted in the lowest water absorption and the highest MOE and MOR. The swelling value and MOR of the produced boards were not acceptable, but their water content, water absorption, and MOE parameters were acceptable according to ISO 8335 1997. Key Words : Physical and mechanical properties, cement wood composite, sawdust
ASR OF RICE HUSK AND THE POTENTIAL USE OF RHA TO MITIGATE ASR IN CEMENT COMPOSITE . Bakri; Djamal Sanusi; Musrizal Muin
PERENNIAL Vol. 6 No. 1 (2010)
Publisher : Forestry Faculty of Universitas Hasanuddin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24259/perennial.v6i1.194

Abstract

Penelitian ini bertujuan untuk mengetahui potensi reaksi alkali silika (ASR) pada sekam padi. Pembuatan contoh uji Mortar Bar didasarkan pada ASTM C 1260 yang dikenal sebagai "Accelerated Mortar Bar Test". Sekam padi yang telah dibersihkan dan dikeringkan kemudian digiling dengan menggunakan blender selama 3 menit untuk menghasilkan partikel sekam padi lolos ayakan 10 mesh. Pembuatan Mortar Bar dilakukan dengan mencampur sekam padi, semen, dan kapur yang dicetak pada molder kubus ukuran 25 x 25 x 285 mm. Rasio komposisi campuran sekam padi : {(semen : kapur)} terdiri atas 6 komposisi campuran (A, B, C, D, E, dan F) dengan rasio 30 dan 40 % : {( 100 : 0), (72 : 25), (50 : 50)} berdasarkan berat semen + kapur. Persentase pertambahan panjang Mortar Bar diukur setelah contoh uji yang direndam pada larutan NaOH 1 N disimpan dalam tanur pada suhu 80o C selama 16 hari. Hasil penelitian ini menunjukkan bahwa ASR contoh uji Mortar Bar pada semua komposisi campuran tergolong potensial merusak dan sekam padi tergolong agregat reaktif.
KAJIAN PRODUKSI, PERDAGANGAN, INDUSTRI DAN TEKNOLOGIEBONI Djamal Sanusi
BERITA BIOLOGI Vol 6, No 2 (2002)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/beritabiologi.v6i2.1481

Abstract

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Chemical and Physical Treatments of Four Rattan Species after Felling Djamal Sanusi
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 10, No 1 (2012): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (341.483 KB) | DOI: 10.51850/jitkt.v10i1.130

Abstract

The effectiveness of chemical and physical treatments in protecting four rattan species (i.e., batang, saloso, lambang, anranga) against blue stain attack were studied. Four rattan mature stem of each species were felled, and each rattan cane was cutted into 9 samples with 1 m long for every treatment. The treatments consisted of soaking in 0.5% formalin solution for 10 min, soaking in 10% boric acid solution for 10 min, and dipping the two cross sections in melted wax. Untreated samples were also prepared for control. The samples were stored in harvesting location for 20 days. Every 5 days, the samples were observed for the presence of blue stain attack. The results showed that untreated samples were attacked by blue stain with the average intensity of 59.3% and the average depth of 5.3 cm. Samples soaked in 0.5% formalin solution were attacked by blue stain with the average intensity of 40.3% and the average depth of 2.4 cm. Samples soaked in 10% boric acid were attacked by blue stain with the average intensity of 18.8% and the average depth of 0.8 cm. Samples treated by melted wax were found to be free from blue stain attack.Key words: blue stain, chemical treatment, physical treatment, rattan
Co-Authors . Bakri Endra Gunawan Musrizal Muin