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KELAS KUAT KAYU TUMIH (Combretocarpus rotundatus (Miq.) Danser) BERDASARKAN BAGIAN BATANG (The the physical and mechanical Properties of Tumih Wood Based on Section Stem) Luhan, Gimson; Joni, Herwin; Johansyah; Yanciluk; Mujaffar, Ahmad
Jurnal Hutan Tropika Volume 14 Nomor 2 Tahun 2019
Publisher : Jurusan Kehutanan, Fakultas Pertanian Universitas Palangka Raya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36873/jht.v14i2.1150

Tumih wood (Combretocarpus rotundatus (Miq.) Danser) is classified as an unknown type of wood which is widely grown in peat swamp forests in Central Kalimantan. This study aims to analyze the physical properties and mechanical properties of wood in axial and radial directions so that they can be utilized properly. The results of the study resulted in fresh water content and dry air content of wood air, each of which was 71,58% and 19,33%, kiln dry weight 0,72, tangential shrinkage 9,68%, radial shrinkage 5,02% and longitudinal shrinkage 0,19%. Testing of mechanical properties resulted in a flexural firmness of 618,33 kg/cm2, compressive strength parallel to the fiber 333,27kg/cm2, shear constancy 92,02 kg/cm2, hardness 355,60 kg/cm2, and stiffness at 19,50kg/cm2. Based on the Indonesian Wood Construction Regulations Standard (PKKI) NI 5-1961 tumih wood is included as a strong class III of Indonesian wood, so it is quite well used for home building raw materials, beams, floor and wall boards, door/window frames, and furniture.

KELAS KUAT KAYU TUMIH (Combretocarpus rotundatus (Miq.) Danser) BERDASARKAN BAGIAN BATANG (The the physical and mechanical Properties of Tumih Wood Based on Section Stem) Gimson Luhan; Herwin Joni; Johansyah; Yanciluk; Ahmad Mujaffar
HUTAN TROPIKA Vol 14 No 2 (2019): Volume 14 Nomor 2 Tahun 2019
Publisher : Jurusan Kehutanan, Fakultas Pertanian Universitas Palangka Raya

Tumih wood (Combretocarpus rotundatus (Miq.) Danser) is classified as an unknown type of wood which is widely grown in peat swamp forests in Central Kalimantan. This study aims to analyze the physical properties and mechanical properties of wood in axial and radial directions so that they can be utilized properly. The results of the study resulted in fresh water content and dry air content of wood air, each of which was 71,58% and 19,33%, kiln dry weight 0,72, tangential shrinkage 9,68%, radial shrinkage 5,02% and longitudinal shrinkage 0,19%. Testing of mechanical properties resulted in a flexural firmness of 618,33 kg/cm2, compressive strength parallel to the fiber 333,27kg/cm2, shear constancy 92,02 kg/cm2, hardness 355,60 kg/cm2, and stiffness at 19,50kg/cm2. Based on the Indonesian Wood Construction Regulations Standard (PKKI) NI 5-1961 tumih wood is included as a strong class III of Indonesian wood, so it is quite well used for home building raw materials, beams, floor and wall boards, door/window frames, and furniture.

KARAKTERISTIK ARANG AKTIF DARI SERBUK LIMBAH KAYU UNTUK MENINGKATKAN KUALITAS AIR: Characteristics of Active Charcoal from Powder Wooden Waste which is Applicable for Improving Water Quality Alpian; Kilinton Sihombing; Herwin Joni; Mahdi Santoso; Grace Sisca; Wahyu Supriyati
HUTAN TROPIKA Vol 16 No 1 (2021): Volume 16 Nomor 1 Tahun 2021
Publisher : Jurusan Kehutanan, Fakultas Pertanian Universitas Palangka Raya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36873/jht.v16i1.2967

The waste of wood processing industry such as the plywood, sawmill and woodworkingindustries give waste as form of end pieces, slash, peeling residue, scrap and sawdust.The wood waste is not utilized by the furniture industry. The solution of this problem isto process these wood waste into activated charcoal. Activated charcoal can be madefrom any material containing carbon, both organic and inorganic, provided that thematerial is porous.The first,the waste wood of Ulin, Benuas, and Agathis used asmaterials in this study were carbonized and then made into activated charcoal. Thequality test of activated charcoal were yield, moisture content, ash, volatile matter, fixedcarbon, absorption of benzene, absorption of iodine and absorption of methylene blue.Overall, not all research treatments on the quality of activated charcoal fulfill to SNI 06-3730-1995. The quality of Agathis wood activated charcoal has the best quality (520,83mg/g) from all treatments by the highest score of iodine absorption (Kimia Farma (KF)standard requires >426.5 mg/g). Based on the standar of drinking water quality No.416/Menkes/Per/IX/1990, activated charcoal of agathis wood can improve the quality ofbore well water except for turbidity.Keywords: Activated charcoal, ulin, benuas, agathis, bore well water

ANALISIS BIAYA PEMANFAATAN LIMBAH INDUSTRI MEBEL DI TIO ART COLLECTION KOTA PALANGKA RAYA : Cost Analysis of Utilization of Furniture Industry Waste at Tio Art Collection, Palangka Raya City Pebri Leonardo Tampubolon; Nuwa; Desy Natalia Koroh; Herwin Joni; Yosep
HUTAN TROPIKA Vol 16 No 1 (2021): Volume 16 Nomor 1 Tahun 2021
Publisher : Jurusan Kehutanan, Fakultas Pertanian Universitas Palangka Raya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36873/jht.v16i1.2973

This study aims to determine the total income, production costs, absolute profit, andbreak-even point from the business of utilizing wood waste, through analysis of RevenueCost Ratio (RCR) analysis at Tio Art Collection, Palangka Raya City in 2019. Theanalysis uses a quantitative descriptive method. The results of this study indicate that thewood waste used in Tio Art Collection is ironwood waste (Eusideroxylon zwageri T et B)and balangeran wood waste (Shorea laevis Ridl.). Tio Art Collection's wood craft businessis economically viable because it has an R/C ratio of 1.73.Keywords: Wood waste, R/C ratio, cost and income.

Sifat Fisika Mekanika Papan Semen dari Limbah Penggergajian Berdasarkan Komposisi Jenis Serbuk Kayu Meranti Merah (Shorea Leprosula Miq) dan Terentang (Campnosperma Spp) : Mechanical physical Properties of Cement Board made from Sawmill Waste Based on Saw Dust Composition of Red Meranti (Shorea leprosula Miq) And Terentang (Campnosperma Spp Sitorus Sitorus; Desy Natalia Koroh; Herwin Joni; Raden Mas Sukarna; Yosefin Ari Silvianingsih
HUTAN TROPIKA Vol 18 No 2 (2023): Volume 18 Nomor 2 Tahun 2023
Publisher : Jurusan Kehutanan, Fakultas Pertanian Universitas Palangka Raya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36873/jht.v18i2.12008

This research aims to determine 1) the effect of the composition of red meranti and terentang sawmill waste to physical and mechanical properties of wood dust cement board according to SNI 03-2105-2006 and 2) determine the physical and mechanical properties of red meranti and terentang sawmill waste particle cement board the best based on SNI standards. The research method used a single factor Completely Randomized Design with five levels, namely A1(100% red meranti), A2(100% terentang), A3(50% red meranti: 50% terentang), A4(75% red meranti: 25% terentang) and A5 (25% red meranti: 75% terentang) using sawdust: cement ratio of 1:2, each treatment was repeated three times so that the number of sawdust cement boards made were fifteen pieces of sawdust cement board. The test parameters are physical properties (density, moisture content and thickness swelling) and mechanical properties (MoE, MoR and screw holding). Next, test the data for normality using Kolmogrov-Smirnov (SPSS 24). The results of research on the treatment of the composition of sawdust from red meranti and terentang using a cement sawdust ratio of 1:2 not significant effect on the physical and mechanical properties of sawdust cement board, because the specific gravity of red meranti wood and terentang did not significant different. The physical properties of sawdust cement board meet SNI 03-2105-2006, the best treatment was A1 (100% red meranti wood) for water content (9.09%) and thickness swelling (1.53%) while for density the best is in A4 powder composition (75 %: 25%, red meranti: terentang). The overall average value of mechanical properties does not meet SNI 03-2105-2006.

Struktur Anatomi Kayu Meranti Tembaga (Shorea leprosula Miq.) pada PT. Dwima Jaya Utama: Anatomical Structure of Meranti Tembaga (Shorea leprosula Miq.) at PT. Dwima Jaya Utama Herwin Joni; Wahyudi Wahyudi; Sosilawaty Sosilawaty; Mahdi Santoso
HUTAN TROPIKA Vol 19 No 1 (2024): Volume 19 Nomor 1 Tahun 2024
Publisher : Jurusan Kehutanan, Fakultas Pertanian Universitas Palangka Raya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36873/jht.v19i1.14289

This study analyzes the quality of meranti tembaga wood from natural forests with a maximum diameter of 50 cm as a material for the timber management industry. Furthermore, the study also examined the quality of meranti tembaga wood (Shorea leprosula Miq.) from silin engineering plants with diameters of 28 cm, 36 cm, 43 cm, and 51 cm. This study also examines the diversification of the use of copper meranti wood from silin engineering plants to explore the potential applications of this wood in various industries. Meranti tembaga wood samples were taken from natural forests and plantation forests (intensive silviculture/silin) of PBPH PT Dwimajaya Utama, Central Kalimantan. Furthermore, wood anatomy testing was carried out at the Forest Hasi Technology Laboratory, Gadjah Mada University. The quality of Copper meranti wood from natural forests with a minimum diameter of 50 cm for the wood processing industry was studied. The results of the analysis of the quality of meranti tembaga wood from Silin engineering plants showed significant variations based on diameter. For a diameter of 28 cm, the cell wall thickness is 1.675 and the lumen diameter is 22.752. For a diameter of 36 cm, the cell wall thickness is 1,633 and the lumen diameter is 20,739. For a diameter of 43 cm, the cell wall thickness is 1.592 and the lumen diameter is 2.268. For a diameter of 51 cm, the cell wall thickness is 1,738 and the lumen diameter is 21,066.

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