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All Journal Pilar Teknologi : Jurnal Penelitian Ilmu-ilmu Teknik
Sutrisno .
Universitas Merdeka Madiun

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Pengaruh Ekstrak Daun Melinjo Terhadap Laju Korosi Pada Material Baja: - Sutrisno .
JURNAL PILAR TEKNOLOGI Jurnal Ilmiah Ilmu Ilmu Teknik Vol. 8 No. 2 (2023): JURNAL PILAR TEKNOLOGI
Publisher : LPPM Universitas Merdeka Madiun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33319/piltek.v8i2.165

Abstract

In the rapid development of industry and construction in the current era, iron is a material that is widely used as a material in construction activities around the world. However, iron has the disadvantage of being very susceptible to corrosion. Corrosion is a decrease in metal quality due to electrochemical reactions with the environment. One of the corrosion prevention measures taken against iron is the addition of corrosion inhibitors to inhibit the corrosion rate. Inhibitors from natural materials are an alternative as an environmentally friendly inhibitor. This study aims to determine the efficiency of using melinjo leaf extract inhibitor in inhibiting corrosion rate in 3% Nacl corrosive media. The method used is the mass loss method to see the value of the corrosion rate. This study uses ST 37 steel plate material with a size of 2x1.5x0.12 cm. The concentration variation of melinjo leaf extract is 0%, 3%, 6%, and 9% with a soaking time of 14 days. The results showed that the addition of melinjo leaf extract as an inhibitor can reduce the corrosion rate with the smallest corrosion rate of 0.0449 mmpy and the greatest inhibitor efficiency is at a concentration of 9% at 51.72%.
A Pengaruh Variasi Fraksi Volume Komposit Serat Akar Wangi (Vetiveria Zizanioides) Dan Serbuk Genteng Dengan Resin Polyester Terhadap Uji Ketahanan Bakar Sutrisno .
JURNAL PILAR TEKNOLOGI Jurnal Ilmiah Ilmu Ilmu Teknik Vol. 10 No. 1 (2025): JURNAL PILAR TEKNOLOGI
Publisher : LPPM Universitas Merdeka Madiun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33319/piltek.v10i1.217

Abstract

Natural fiber reinforced composites have advantages as composite reinforcement, namely having a relatively light density and strength and stiffness are also quite high. In this study the authors made specimens using natural fibers in the form of vetiver fiber (vetiveria zizanioides) as composite reinforcement and added tile powder as filler, tile powder has good compounds to strengthen the resulting composite. The purpose of this study was to test the combustion resistance of vetiver fiber reinforced composites and roof tile powder with polyester resin as the matrix. This composite is made by hand lay up technique with variation of volume fraction of vetiver fiber 0%, 5%, 10%, 15%, 20%, roof tile powder 20%, 15%, 10%, 5%, 0%, 80% polyester resin with random fiber orientation. Combustion resistance testing was conducted according to ASTM D-635 standard. The results of this study indicate that composites with volume fractions (20%, 0%, 80%) make this composite flammable, namely with an average Time Of Burning value of 26.52 seconds. While composites with volume fractions (0%, 20%, 80%) are composites that have the most fire-resistant properties with an average Rate Of Burning value of 18.723 mm/min. Composites with a lot of vetiver fiber composition have a faster ignition process, while composites that are only given tile powder filler have a longer ignition process. Meanwhile, the more vetiver fiber composition, the faster the process of ignition.
PERANCANGAN POLIMER KOMPOSIT DENGAN SERAT TEBU DAN FIBER GLASS UNTUK PENINGKATAN KEKUATAN TERHADAP UJI TARIK: PERANCANGAN POLIMER KOMPOSIT DENGAN SERAT TEBU DAN FIBER GLASS UNTUK PENINGKATAN KEKUATAN TERHADAP UJI TARIK Sutrisno .
JURNAL PILAR TEKNOLOGI Jurnal Ilmiah Ilmu Ilmu Teknik Vol. 10 No. 2 (2025): JURNAL PILAR TEKNOLOGI
Publisher : LPPM Universitas Merdeka Madiun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33319/piltek.v10i2.240

Abstract

This study investigates the effect of varying weight fractions of sugarcane fiber and fiberglass on the mechanical properties of polyester resin-based composite, with a focus on improving tensile strength. Sugarcane fiber, a lignocellulosic natural reinforcement with a length of 3 cm, was used alongside fiberglass as a synthetic reinforcement to evaluate the performance of hybrid composites. Specimens were fabricated using the hand lay-up method with five combinations of sugarcane fiber (0–10%) and fiberglass (0–10%), while the polymer resin and catalyst comprised 90% of the total composite weight. Tensile testing was conducted according to ASTM D638-01 using a Universal Testing Machine. The evaluated parameters include maximum tensile stress, strain, and elastic modulus. Experimental results showed the highest tensile strength of 88,186 MPa at 0% sugarcane fiber and 10% fiberglass, and the lowest value of 27,154 MPa at 10% sugarcane fiber with no fiberglass. The maximum strain observed was 0.0050 mm/mm, and the minimum was 0.0012 mm/mm. The highest elastic modulus was 71,287 MPa, while the lowest was 5,384 MPa. These results confirm that an optimal combination of natural and synthetic fibers significantly enhances the mechanical performance of the composite. This research highlights the potential of sugarcane fiber as a sustainable reinforcement alternative in the development of environmentally friendly composite materials.
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