Harnowo Supriadi
Lampung University

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Utilization Of Fiber And Shell Particles Palm Oil As Substitute Materials In Producing Eternite Ceiling Dwi Kurniawan S; . Tarkono; Harnowo Supriadi
Jurnal Ilmiah Teknik Mesin Vol 1, No 3 (2013)
Publisher : Jurnal Ilmiah Teknik Mesin

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Assessment of science and technology in the field of materials engineering and the development of  environmental issues require new breakthroughs in the provision of high quality materials and environmentally friendly. Nonmetallic materials Composite especially natural fibers that are more lightweight , malleable, corrosion resistance, low price and easy to obtain. research purposes to determine the  mechanical properties of composite fiber and palm shell particles by measuring tensile strength, hardness and bending. In this study, the materials used are such as cement, fiber and oil palm’s shell, and using tools such as mold, ruler, sieve, balance sheets, and others. Composite fibers arranged randomly on the variation of particle mass fraction of 40% coconut oil, 35% of particles and 5% palm fiber, 30% particles and 10% fiber and 25% palm oil and 15% of particles of oil palm fiber. Pull Testing  was conducted with  reference to DIN 50 125, flexure testing with standard DIN 1101.  Both tensile testing and flexural testing were conducted  to determine the mechanical properties of the composite . The highest value of flexure test  result is in the composite content of 25% particles and 15 % fiber particles is equal to 2:44 N/mm2 and  the lowest value of bending test  result is the composite content of  particles 40% of palm oil is equal to 1365 N/mm2. While for the tensile test results , the highest value is  in the composite content of 30% and 10% of particles of oil palm fiber at  0.479 N/mm2, and for  the lowest drag value  is on the particle content of 35% composite and 5 % palm fiber  at  0.15 N/mm2 . As for the highest value in hardness test is in the composite content of  30% and 10% of particles Fiber HRH palm of 36.5, and the lowest value is 26.5% HRH the composite contains of 35% particle and 5% palm fiber. Keywords: Composite, fiber and palm shell particles, mechanical strength, tensile test, hardness test  and bending test
Pengaruh Variasi Ukuran Partikel Marmer Statuari Terhadap Sifat Mekanik Komposit Partikel Marmer Statuari I Gede Mahayatra; Harnowo Supriadi; Shirley Savetlana
Jurnal Ilmiah Teknik Mesin Vol 1, No 4 (2013)
Publisher : Jurnal Ilmiah Teknik Mesin

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Abstract Manufacture a composite material with a matrix resin epoxy  and marble statuary powder as filler is one industry-utilization of waste. Mechanical properties of the composite material is influenced by the particle size of the particles. variations in particle size would form different mechanical properties. This research was conducted to investigate the effect variations in particle size on the mechanical properties of the composite particles. In this research variation in particle size marble  statuary  used is 60 mesh, 100 mesh, 140 mesh and 200 mesh. Resin used is epoxy resin, and composition of the volume ratio between the matrix and the particles used in research was 80%: 20%. The method is used in the manufacture of composite hand lay-up method. Tests performed in this research is XRD testing on solid marble, bending strength, hardness, and SEM. XRD results obtained from the testing phase identified in the marble statuary are Ca2O5Si , CaCO3, CaO, SiO2 , MgO , MgCO3 , and SiC. Hardness value of composite particles of marble is 22.3 to 48.33 HB, and flexural strength values of composite particles of marble statuary  is from 13.89 to 38.89 N/mm . Particle size is good for filler in the composite is 140 mesh particles. Marble composite particles 140 mesh particle size has a flexural strength and hardness highest, because SEM photograph composite of 140 mesh particle distribution in the matrix evenly, and there is a good bond between the matrix and particles of marble statuary. Keywords: Marble statuary, composite, particle size marble, epoxy , the mechanical properties
PENGARUH VARIASI ABU SEKAM DAN BENTONIT PADA CETAKAN PASIR TERHADAP KEKERASAN DAN STRUKTUR MIKRO 2) 1) HASIL CORAN ALUMUNIUM AA 1100 . Tarkono; Harnowo Supriadi; Doni Sewandono
Jurnal Ilmiah Teknik Mesin Vol 1, No 3 (2013)
Publisher : Jurnal Ilmiah Teknik Mesin

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The aim of this research is to know the physical and mechanical properties of aluminum casting results printed by using sand mold. Variation is made on the formation of mold sand where there happens a difference of the addition of binding substance rice husk ash and bentonite have been blended into a sand mould-forming composition. The Material used in this study is aluminum with purity levels above 99, which melted in the kitchen Dipper Krusible type and printed in sand mold. The tools which are used in testing hardness and micro-structure of tests in a row are: brinell hardness test and olympus metallurgical microscope.  Brinell hardness testing uses the test with the standard ASTM E 10-01 and micro testing structure uses standard ASTM E 3 by way of looking at the specimen under a microscope. From this data, it can be obtained that the lowest hardness calculation of test results of 17.7636 HBW for compositions that vary on a mixture of bentonite and ash 6% husk 14%, and the maximum calculation of the hardness is obtained on the composition of the mixture of 10% and 8% bentonite husk ash, where the calculation of the hardness of 22.8100 HBW. In micro structure testing; looks that porosity in aluminum in great numbers when a comparison between bentonite and binding substance grey husk in the levels are quite different, causing the result of casting have much number of porosity, so that it causes the low level of the hardness. While  for the comparison of levels of grey husk and bentonite which approach the same levels, When added to the composition of the sand mould-forming, micro structure test results showed that metal casting results have little amount of porosity causing aluminum castings results have a high level of hardness. Keywords : sand mold, porosity, hardness calculation, micro structure.
PENGARUH PERLAKUAN ALKALI TERHADAP KEKUATAN TARIK SERAT TANDAN KOSONG KELAPA SAWIT UNTUK DIGUNAKAN PADA KOMPOSIT SERAT TKKS Firman Gultom; Harnowo Supriadi; Shirley Savetlana
Jurnal Ilmiah Teknik Mesin Vol 2, No 2 (2014): Jurnal FEMA Vol.2 No.2 Tanggal 10 April 2014
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Empty Palm bunches (TKKS) is one of the solid waste generated by industrial palm oil plantations which contain lots of fiber and is one of the natural fiber source that the availability of abundant in Indonesia, especially in the province of Lampung. TKKS fiber can be used as an alternative amplifier to composite materials. This research was conducted to determine the influence of the chemical composition of TKKS fiber and know the tensile strength from TKKS fiber by doing a tensile test. Alkaline treatment NaOH 5% given to fiber to separate lignin and contaminants that contained in fiber so that it can increase the tensile strength fibers. TKKS fiber is obtained processing palm oil factory by the process of boiling oil palm fresh fruit bunches with a pressure of 2.5 until 3atm at temperature 130  C during 50 – 60 minutes. TKKS already parsed and then selected and measured with a length of 6 cm and a diameter of 0.2 mm. And then given an alkaline NaOH 5%. In this research on the treatment of alkaline NaOH 5% provided that treatment during 0 hours (without treatment), 2 hour, 4 hour, 6 hour. Results from the study found that fiber tensile strength affected by the chemical composition on the fiber, the higher the tensile strength of the cellulose content is increasingly high. Tensile strength in fiber with alkali treatment 2 hours of 0,03528 Mpa, 0,3996% strain,   0,088288 MPa elasticity modulus, if compared with  fiber without alkali treatment of 0,018946 MPa tensile strength, 0,2056% strain, 0,092149 MPa elasticity modulus. This is due to the levels of cellulose fibers with alkali treatment 2 hours increased by 58,2808%, if compared with  fiber without alkali treatment by 13,2848%