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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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Journal : PERENNIAL

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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.
Co-Authors . Bakri Endra Gunawan Musrizal Muin