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All Journal Jurnal Ilmu dan Teknologi Hasil Hutan Jurnal Teknik Sipil Jurnal Ilmu dan Teknologi Kayu Tropis PERENNIAL

Sucahyo Sadiyo

Departemen Hasil Hutan, Fakultas Kehutanan, Institut Pertanian Bogor Jl. Raya Darmaga, Bogor 16680

Author-ID : 367761

Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Civil Engineering, Building, Construction & Architecture Environmental Science

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Articles

Title

Properties of Oriented Strand Board Prepared from Steam Treated Bamboo Strands under Various Adhesive Combinations Adrin Adrin; Fauzi Febrianto; Sucahyo Sadiyo
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 11, No 2 (2013): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

The objectives of this research were to analyze the physical and mechanical properties of Oriented Strand Board (OSB) prepared from steam treated betung bamboo (Dendrocalamus asper) strands under various adhesive combinations. The strands were steamed at 126 °C for 1 h with the pressure of 1.4 kg cm-2 prior to be blended with adhesive. Three-layered OSBs with the core layer orientation perpendicular to the face layers were prepared by bonding using 5% methylene diphenyl diisocyanate (ISO), 7% phenol formaldehyde (PF), combination of ISO:PF:ISO and PF:ISO:PF adhesives. Paraffin in amount of 1% was added as an additive. The strand ratio for face, core, and back layers was 1:1:1, respectively.The results indicated that the physical properties i.e., water absorption and thickness swelling, and mechanical properties i.e., modulus of rupture and modulus of elasticity both parallel and perpendicular to the grain direction and internal bond of OSB bonded ISO and combination of ISO:PF:ISO adhesives were much better than that of bonded with combination PF:ISO:PF and PF adhesives. Almost all parameters of OSB tested in this experiment were higher than the minimum criteria requirement of CSA 0437.0 (Grade 0-2) standard, except the value of MOE perpendicular to the grain direction of OSB bonded with PF adhesive.Key words: betung bamboo, isocyanate, oriented strand board, phenol formaldehyde, steam

Characteristics Ultrasonic Waves Velocity and Anatomical Properties of Tapping Pine Maryam Jamilah; Lina Karlinasari; Sucahyo Sadiyo; Gunawan Santosa
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 13, No 1 (2015): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

Non-destructive testing based on sound wave propagation has been used widely to estimate wood quality of standing trees. The aim of this study was to evaluate the characteristics of the sound wave velocity in relation to pine resin productivity and resin intercellular frequency and diameter. The samples were 72 trees consisted of 36 trees which were tapped by the quarre method and 36 other trees were tapped with addition of stimulants. The speed of sound waves propagation was measured by SylvatestDuo for radial direction and longitudinal. The tapping position was determined refering to the wind direction. The resin productivity was twice for tapping with stimulant comparing to the control. The highest resin productivity was 87.31 g per harvest for tapping with stimulant and the lowest (39.86 g per harvest) for control. Statistically, there was not significant difference in sound speed for tapped position as well as for measurement before and after tapped of both radial and longitudinal testing, as well as for the anatomical properties of both of treatments. A high positive correlation was found between resin productivity and intercellular frequency for both treatments (r>0.80), however, there was not significance correlation between resin productivity and other parameters.Keywords: Pinus merkusii, resin tapping, sound wave propagation

Kajian Hubungan antara Kekuatan Sambungan Paku dengan Diameter Paku dan Berat Jenis Kayu pada Beberapa Kayu Indonesia Study on Correlation between Nail Connection Strength and Both Nail Diameter and Specific Gravity on Several Indonesian Wood Sucahyo Sadiyo; Agustina Suharti
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 3, No 1 (2005): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

On a strong, stiff, and stable wood construction for structural purposes, wood connection on several elements on its constituent is generally performed. On this construction, wood connection is a critical point. The strength of this connection is affected by the strength of 3 components, i.e. the connector, the wood, and the connection type. In a truss of structural construction, element of its constituent will receive compressive or tensile loads. In a case of connection, such load is called lateral resistance. In this study, the nail and several Indonesian wood species namely Sengon, Meranti, Kamper, and Bangkirai representing the low, moderate, and high specific gravity, were utilized. Effect of the nail diameter as a connector and wood specific gravity on wood connection has been investigated.The main objective of this research was to study the correlation between nail connection strength in two types of loading (lateral and withdrawal), and both nail diameter and wood specific gravity on several Indonesian wood.Based on this study there was a positive correlation between nail diameter and wood specific gravity on lateral or withdrawal resistance. Increasing both the nail diameter and wood specific gravity, resulted in increasing the wood connection strength. Correlation model for lateral and withdrawal resistances using P as the ultimate load, D as nail diameter, and G as wood specific gravity, respectively were P = 19.95 GD2.07 and P = 38.02 G1.42D

Modifikasi Faktor Konversi Format dan Faktor Normalisasi Reliabilitas dalam Standar ASTM D 5457 untuk Penyempurnaan Standar SNI 7973:2013 (Modification of Format Conversion Factor and Reliability Normalization Factor in the ASTM D 5457 Standard Applicable for SNI 7973:2013 Standard) Leonard D D Liliefna; Naresworo Nugroho; Lina Karlinasari; Sucahyo Sadiyo
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 17, No 1 (2019): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

The Indonesian SNI 7973:2013 standard for wood design specification was an adopted standard from the USA national design specification (NDS) 2012. However, due to the climate differences between USA and Indonesia, the SNI 7973:2013 standard should be further modified in order to meet the climate condition in Indonesia. Format conversion factor (KF) and reliability normalization factor (KR) specified in the ASTM D 5457 standard contained the snow load for the duration of load factor. Therefore, the objectives of this study were (1) to replace snow load with occupancy live load to revise KF, (2) to use the revised KF and safety factors for softwood and hardwood to perform the reliability analysis on calculated resistance factors (fc), (3) calculate the new KR values using the revised fc. The result of FORM reliability analysis showed that there were, on the average, 15 and 26% increases of the calculated KR values, respectively, for softwood and hardwood, over the calculated KR values according to the ASTM D 5457 standard for each given coefficient of variation of material resistance distribution.

Lateral Design Value (Z) for Various Double Shear Multi-Nailed Wood Connections with Steel Side Plates Sucahyo Sadiyo
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 8, No 2 (2010): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

Experiments were conducted to analyze the lateral design value (Z) for double shear wood connections using multiple nails with steel side plates of seven different Indonesian tropical wood species under uniaxial compression loading. Results showed variations in average wood moisture content (MC) for nail connections, the lowest in Kempas to the highest in Bornean Super wood. Whereas for average specific gravity (SG), density (ρ), allowable load compressive stress parallel to grain (Ftk//) and tensile stress parallel to grain (Ftr//), the lowest was in Meranti merah and highest in Bangkirai wood. Values for Ftk//, Ftr// and Z tent to be proportional to the wood’s SG or ρ. Ftr// values were 1.5 to 2 times higher than Ftk//. Pattern or parallel line distribution of average Z values among the experiments was relatively similar. The highest Z value was obtained by 5.2 mm nail followed by 5.5 mm nail for all experiments, except experiment-I (theoretical) and experiment II-B (EC5 2007). Generally, the number of nails did not provide significant effect (relatively uniform) on the average Z value double shear connections.

Morphology of Microfibrillated Cellulose from Primary Sludge Iwan Risnasari; Fauzi Febrianto; Nyoman J Wistara; Sucahyo Sadiyo; Siti Nikmatin
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 11, No 2 (2013): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

Sewage sludge is the largest waste produced from the pulp and paper mill, consist of fibers (50-60%) and inorganic materials.The aim of this study was to obtain the microfibrillated cellulose of sludge through extraction and cellulose disintegration. The cellulose disintegration conducted by a combinations of the refining and ultrasonication treatment. The results showed that after extraction process the mass of C and O were increased. Conversely the mass of Al, Ca, Si and S were decreased. The mass of C and O was further increased after refining and ultrasonication treatment. The process of extraction on sludge could remove lignin, hemicellulose and inorganic materials to obtain more pure cellulose. Cellulose disintegration by a combination of the refining 30 times followed by ultrasonication for 120 min produced microfibrillated cellulose with diameter of 284 nm.Key words: extraction, microfibrillated cellulose, morphology, sludge

Compression Strength Perpendicular to the Grain of Cross Laminated Timber (CLT) of the Three Community Wood Species Muthmainnah Muthmainnah; Sucahyo Sadiyo; Lina Karlinasari
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 12, No 2 (2014): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

Cross Laminated Timber (CLT) is an engineered wood products composed of multi-layered panel of lumber where each layer of boards is placed cross-wise to adjacent layers. The purpose of the present research was to evaluate the compression strength perpendicular to grain of CLT composed of 5 layers tested with line loads in square surface. The position of line loads was in the centre and edge of sample orientated both in parallel and perpendicular to the grain direction at the CLT-surface. The CLT specimens were (15x20x20) cm3 (thickness, width and length) in size and were prepared from three community timber, i.e. sengon (Paraserianthes falcataria), mindi (Melia azedarach L.), and nangka (Artocarpus heterophyllus Lamk.). The result showed that the edge loading position resulted in lower compression strength than that of the central loading position. The highest comprresion strength was retained by CLT tested in the center loading position oriented to perpendicular to the grain direction. The highest compression strength perpendicular to grain was retained by CLT of nangka wood (20.28 kg cm-2) followed successively by those of CLT of mindi (25.97 kg cm-2) and CLT of sengon(8.50 kg cm-2).Keywords: CLT, compressive strength perpendicular to grain, line load, mindi, nangka, sengon

Properties of Wood Plastic Composite Using Primary Sludge as Filler Iwan Risnasari; Fauzi Febrianto; Nyoman J Wistara; Sucahyo Sadiyo; Siti Nikmatin
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 13, No 1 (2015): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

Sludge is the largest waste produced from the pulp and paper mill, it consists of 50-60% fibers and inorganic materials and have caused serious disposal problem. Recycling sludge into value-added product can give environmental and economic benefits. The objective f this research was to optimize utilization of sludge as filler in wood plastic composite using polypropylene as a matrix resin. Sludge with and without purification treatment were used as filler. The concentration of filler used was 40%, 50% and 60%. Maleic anhydride-modified- polypropylene (MAPP) with concentration of 5% was used as a coupling agent. Filler, matrix with and without coupling agent were compounded using Haake polydrive labopastomill at 175 °C, 60 rpm for 20 min. The results indicated that the morphology, physical, mechanical and thermal properties of wood plastic composites was much influenced by purification treatment, filler loadings and addition of coupling agent. Interaction of between fibers and matrix resin and thermal stability of wood plastic composites were much improved by purification treatment on sludge and addition of coupling agent.Keywords: coupling agent, fillers, purification, sludge, wood plastic composite

Co-Authors . Nurhasanah . Suhasman A.A. Ketut Agung Cahyawan W Adrin Adrin Agustina Suharti Akrom, Akrom Dwi Susanto Emma Yusrina Wulandari Evalina Herawati Fauzi Febrianto Fengky Satria Yoresta Gunawan Santosa I Nyoman Jaya Wistara Imam Wahyudi Indrawan, Imam Wahyudi Iwan Risnasari Leonard D D Liliefna Lina Karlinasari Maryam Jamilah Muhammad Sholihin Nanda Elsa Sara Pratiwi Naresworo Nugroho Pratiwi, Nanda Elsa Sara Riezky Rakamuliawan Sutanto Siti Nikmatin Solly Aryza Surjono Surjokusumo Susanto, Dwi Sutanto, Riezky Rakamuliawan Yeyet . Zahrial COTO

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