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All Journal Teras Jurnal Turbo : Jurnal Program Studi Teknik Mesin Inersia : Jurnal Teknik Sipil Dharmakayana: Journal of scientists, engineers, educators and scientific activists related to society development

Gunawan, Agustin

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Author-ID : 1208970

Agriculture, Biological Sciences & Forestry Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Engineering Environmental Science Mechanical Engineering

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Experimental Study of The Effect of Reactor Temperature Variations on The Characteristics of Oil Resulting from The Pyrolysis Method of Crumb Rubber Solid Waste Puspawan, Angky; Supardi, Nurul Iman; Gunawan, Agustin; Mubarok, Abdul Latif; Sulthan, Rifki
TURBO [Tulisan Riset Berbasis Online] Vol 14, No 2 (2025): TURBO: Jurnal Program Studi Teknik Mesin (In Progress)
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar

Energy is an important part of human life because almost all human activities always require energy. Therefore, it is necessary to conduct research to overcome the above problems, namely by making alternative energy by utilizing crumb rubber plant waste into alternative oil. The crumb rubber solid waste that we use comes from the micro blending and macro blending milling process from the process there is waste in the form of granulated rubber (Crumb Rubber Waste). Crumb Rubber Plant waste is currently not being utilized optimally. The basic structure of natural rubber is a linear chain of isoprene units (C5H8) natural rubber is a polymer of hydrocarbon compounds, namely 2–methyl-1,3 butadiane (isoprene). The main purpose of this study is to determine the value of the oil combustion rate resulting from the pyrolysis of crumb rubber solid waste and find out the characteristics of the oil resulting from the pyrolysis of crumb rubber solid waste and find out the comparison of the quality of oil from crumb rubber solid waste. From this study will show the optimum amount of pyrolysis and distillation results to produce oil. Operating conditions take place at atmospheric pressure with temperature variations of 200oC, 250oC, 300oC, and 350oC for 180 minutes for the pyrolysis process which will then be distilled with a temperature of 95°C for 20 minutes. The results showed that % of the conversion of raw materials into oil (amendment) was highest for the pyrolysis process at a temperature of 350oC of 51.86% while in the distillation process pyrolysis oil with a temperature of 350oC as much as 82.55%. For the value of the combustion rate in the largest pyrolysis process with a value of 0.975 at a temperature of 350oC and a distillation process of 1,612 at a temperature of 350oC.

PENGARUH PENAMBAHAN SERAT KULIT PINANG DAN SERBUK KAYU TERHADAP KUAT TARIK BELAH BETON (Kajian Terhadap Ukuran Agregat Maksimal 10 mm) Hasanah, Era Rizky; Gunawan, Agustin; Afrizal, Yuzuar
Inersia: Jurnal Teknik Sipil Vol. 9 No. 1 (2017)
Publisher : Universitas Bengkulu

Concrete has a high compressive strength, but it is low to tensile strength. The pinang skin fiber and wood powderuse to increase the tensile strength. The purpose of this research is to know the effect of addition toward tensile strength and addition percentage variation in concrete that will get the highest tensile strength.The cylindrical specimens with size of 30 cm high and 15 cm diameter to 20 specimens, they are 4 sample of normal concrete and 16 sample of variation oncrete. The addition of pinang skin fiber and wood powder with variation of 0.25%, 0.5%, 0.75%, and 1% of the weight volume of the specimen with used 50% pinang skin fiber and 50% wood powder.The mixture of concrete uses water cement ratioof 0.5 and 60-100 mm slump.The test specimen is immersed for 26 days and the concrete tensile strength test conducted after the concrete at 28 days adding 7 days for drying.The result of this research shows that the variation concrete of 0.25% and 0.5% have increased of tensile strength than the normal concrete as 12.272% and 4.369%. Beside that for the variation concrete of 0.75% and 1% have decreased as 5.044% and 11.929%. The increase of tensile strength value of optimal concrete is found in variation 0.25% that is 12.272% from normal concrete.

PENGARUH PENAMBAHAN ARANG BATOK KELAPA TERHADAP KUAT TEKAN MORTAR Sihombing, Adi Putra; Afrizal, Yuzuar; Gunawan, Agustin
Inersia: Jurnal Teknik Sipil Vol. 10 No. 1 (2018)
Publisher : Universitas Bengkulu

Mortar is a mixture of adhesives (portland and lime cement), sand and water with certain compositions. Use of adhesive materials on building construction in general still use portland cement, but in terms of portland cement costs are required a greater cost. This study aims to determine the behavior of the compressive strength of mortar using Coconut Shell Charcoal (CCS) as a substitute for cement. The method of manufacture and testing of mortar compressive strength refers to SNI 03-6825-2002 with mortar 1Pc: 3Ps mortar. Range of initial flow values used is 105% - 115%. CCS used is pass No. 200 which utilizes combustion results from coconut shells. Variations of mortar test specimens were 0%, 2.5%, 5%, 7.5%, 10% and 12.5% respectively each variation had 10 sample specimens. Test sample was immersed for 27 days and compressive strength mortar test was performed at 28 days. Value compressive strength of mortar on variations of 0%, 2.5%, 5%, 7.5%, 10%, 12.5% are 25.11 MPa, 25.65 MPa, 26.07 MPa,27.00 MPa, 26.40 MPa and 25.98 MPa. The highest increase of mortar compressive value was variation of 7.5% by 7.51%.

PENGARUH LAMA PENGERINGAN BETON SERAT PANDAN PUNDAK DURI (PANDANUS TECTORIUS) TERHADAP KUAT TARIK BELAH BETON hadi, faizal; Gunawan, Agustin
Inersia: Jurnal Teknik Sipil Vol. 11 No. 1 (2019)
Publisher : Universitas Bengkulu

Concrete is a material that have the strength to compression, but it is weak against tensile strength. The weakness of the tensile strength of concrete can be minimized by adding pandanus tectorius fiber. This study was aimed to determine the effect of adding pandanus tectorius fiber to split- tensile strength of concrete and percentage of the fiber in concrete that shows the highest split- tensile strength. The specimens used in this study is cylindrical with dimensions of 30 cm in height and 15 cm in diameter (SNI 03-4810-1998). Total of specimens is 32 that consist of 8 normal concretes and 24 variation concretes. An addition of pandanus tectorius fiber with the variation of 0,25%, 0,5%, and 0,75% was based on volume of the specimen. The mix design of concrete used water-cement ratio of 0.5 and slump of 60-100 mm. The splittensile strength of concrete was tested at 7 days and 14 days of dryng after immersing for 27 days. The result of split-tensile strength test of concrete with a variation of pandanus tectorius fiber showed a decreasing. The decreasing of split-tensile strength of concrete at 41 days was smaller than at 34 days to normal concrete. The highest decreasing percentage of split-tensile strength of variation concrete to normal concrete was respectively 9,249% (variation 0,25 tested at 41 days) and 14,518% (variation 0,75% tested at 34 days) .

PENGARUH PENAMBAHAN ARANG SERBUK KAYU GERGAJI TERHADAP KUAT TEKAN MORTAR Manullang, Hotmalina; Supriani, Fepy; Gunawan, Agustin
Inersia: Jurnal Teknik Sipil Vol. 11 No. 1 (2019)
Publisher : Universitas Bengkulu

Mortar is a mixture of adhesive (Portland cement and limestone), sand, and water with a certain composition. Mortar is used in structural and nonstructural constructions. This research uses sawdust charcoal as cement addition because in similar research mention that wood charcoal contains silica. This research was aimed to know the value of compressive strength of the mortar (1:3 and 1:5) by using sawdust charcoal as cement addition. The method of manufacture and testing compressive strength of mortar refers to SNI 03-6825-2002. The mortar specimens is cube shaped with side 50 mm and the total of specimens have 112 mortar test specimens. Variations of sawdust charcoal used were 2,5%, 5%, 7,5%, 10%, 12,5% and 15% of the weight of cement. The range of initial flow values used are 105% - 115 (SNI 03-6882-2002). The specimens were soaked for 26 days and compressive strength test of mortar was performed at 28 days. The test results showed that the compressive strength value of normal mortar (1:3) of 25,09 MPa, the value of compressive strength of variation mortar 2,5%, 5%, 7,5%, 10%, 12,5% and 15% respectively are 25,89 MPa, 26,93 MPa, 27,84 MPa, 25,58 MPa, 20,68 MPa and 17,24 MPa. The value of compressive strength of normal mortar (1:5) of 15,48 MPa, the value of compressive strength of mortar variation 2,5%, 5%, 7,5%, 10%, 12,5% and 15% respectively are 15,83 MPa, 16,24 MPa, 17,01 MPa, 15,59 MPa, 14,45 MPa dan 12,26 MPa. The highest increase of compressive strength value in mixture 1:3 was variation 7,5% by 10,94% and mixture 1:5 was variation 7,5% by 9,90% from the compressive strength value of normal mortar.

PENGARUH PENGGUNAAN ABU SABUT KELAPA SAWIT SEBAGAI BAHAN PENAMBAH SEMEN TERHADAP KUAT TEKAN PAVING BLOCK gunawan, agustin; abimanyu, febriyan; afrizal, yuzuar
Inersia: Jurnal Teknik Sipil Vol. 12 No. 1 (2020)
Publisher : Universitas Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/ijts.12.1.12-17

The research is motivated by the large amount of untreated oil palm industrial waste, with a silica contet. This research was aimed to find the compressive strengh of paving block that use oil palm fiber ash as the added material to cement. This research method was experimental. The paving block making prosess was done in the way which the factory did. The specimens made had a size of 20 cm x 10 cm x 6 cm with a ratio of 1 cement : 3 sand. The variations of the ash addition were consecutively 0%, 2,5%, 5%, 7,5%, 10%, 12,5% and 15% to the volume of cement. The total number of specimens was 35, with 5 pieces for each variation. Water requirement in each mixture referred to SNI 03-6882-2002. Paving block was formed manually, soaked for 12 days, then at the age of 13 days paving block was cut into cubes with 5 cm on each side and tested for compressive strength at the age of 14 days. The results of the average compressive strength of paving block in each variation were consecutively 15,13 MPa, 15,22 MPa, 15,78 MPa, 16,44 Mpa, 16,53 MPa, 13,77 MPa and 10,37 MPa. The highest value of compressive strength occurred on the addition of 10% which was equal to 16,53 MPa (increased by 9,25% from the normal paving block (variation of 0%) and the largest decrease occurred on the variation of 15% (-31,51% from the normal paving block). Keywords : paving block, compressive strength, oil palm fiber ash

PENGARUH PENGGUNAAN ABU SABUT KELAPA SAWIT SEBAGAI BAHAN PENGGANTI SEBAGIAN SEMEN TERHADAP KUAT TEKAN PAVING BLOCK firdaus, wahyu; afrizal, yuzuar; gunawan, agustin
Inersia: Jurnal Teknik Sipil Vol. 12 No. 2 (2020)
Publisher : Universitas Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/ijts.12.2.69-74

The Oil palm fiber ash has a silica content of 59.1% which make it possible as a partial replacement for cement. This research was aimed to determine the effect of oil palm fiber ash as a partial replacement of cement to compressive strength of paving block. The specimens was made with a size of 20 cm x 10 cm x 6 cm and used a ratio of 1 cement: 3 sand with the variations of the substitution of 0%, 2.5%, 5%, 7.5%, 10%, 12.5% and 15% of the volume cement. The water requirement used the initial flow test according to SNI 03-6882-2002 with each variation had the same amount of water. Specimens printed were soaked in a soaking tub at the age of 1 day for 12 days, then cut into cubes of 5 cm all side using a grinder. The testing of the compressive strength was done at the age of 14 days. Results of the average compressive strength in variations of 0%, 2.5%, 5%, 7.5%, 10%, 12.5%, 15% were respectively 15,13 MPa, 15,36 MPa, 16,02 MPa, 12,97 MPa, 12,16 MPa, 10.00 MPa and 8.01 MPa. The test results showed that the highest increase occurred on the replacement variation of 5% (5.85% from normal paving block) and the maximum decrease occurred on the replacement variation of 15% which was equal to - 47.09% from the normal paving block. The results of the research indicate that the partial replacement of cement with oil palm fiber ash above 5% of the cement volume decreased the compressive strength of paving block. Keywords : oil palm fiber ash, compressive strength, paving block.

ANALISIS PRODUKTIVITAS TENAGA KERJA PADA PEKERJAAN PASANGAN BATA PERUMAHAN TIPE 36 (Studi Kasus pada Perumahan Griya Putri Tanjung Kota Bengkulu) Yulianty, Chindy; Supriani, Fepy; Gunawan, Agustin
Inersia: Jurnal Teknik Sipil Vol. 13 No. 1 (2021)
Publisher : Universitas Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/ijts.13.1.8-16

The process of housing development is inseparable from labor productivity. This study aimed to determine the value of LUR (Labor Utilization Rate), workgroup productivity, and dominant factors that influence the masonry work in Griya Putri Tanjung Housing. The method used in the research was field observations for six houses by observing the effective work time, contribution work time, and ineffective work time, calculating the area of bricklaying and questionnaires to 12 workers. The questionnaires were processed with SPSS 24. The results obtained showed that the highest worker utility factor (LUR) was on day 2 of 88.89%. The Average LUR in Putri Tanjung Griya Housing is greater than 50%, so the work utility factor reaches the effective time. The highest average productivity of each workforce is on the 3rd day by a productivity value of 1.51 m2/hour/person. The most dominant factor was the time factor and implementation conditions (up to 82%), then the physical factor of labor (32,8%), managerial (-24,1%), the background of the employee (19,1%). The lowest factor was the group factor and the expertise of the workforce by a percentage of influence of -17,5%. Keywords: housing, labor, bricklaying.

PENGARUH PENAMBAHAN ABU SEKAM PADI TERHADAP KUAT TEKAN MORTAR Pascasari, Auliarizky; Wahyuni, Ade Sri; Islam, Mukhlis; Gunawan, Agustin; Afrizal, Yuzuar
Inersia: Jurnal Teknik Sipil Vol. 13 No. 2 (2021)
Publisher : Universitas Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/ijts.13.2.84-88

The purpose of this research is to know the comparison of compressive strength mortar with additional material rice husk ash to normal mortar. Rice husk ash used has been burned at high temperatures above 400°C. The percentages of rice husk ash used are 6%, 9%, 12%, and 15% with 7 samples in each variations. The total of mortar cubes are 105 pieces sized 50mm x 50mm x 50mm. The range of initial flow values are used 105%-115% (SNI 03-6882-2002). The test specimen was immersed for 13, 20, and 27 days and mortar compressive strength test was conducted at the age of 14, 21, and 28 days. The highest compressive strength occurred at 9% variation with an average compressive strength value of 13,24 MPa, with a percentage increase of 10,15% from normal mortar. The lowest compressive strength occurred at 6% variation with an average compressive strength value of 11,22 MPa, with percentage decrease of 6,66% from normal mortar. The result shows that the use of rice husk ash with variation 9% and 12% produce higher compressive strength than normal mortar.

PENGARUH PENGGUNAAN ABU TERBANG (FLY ASH) SEBAGAI BAHAN TAMBAH TERHADAP KUAT TEKAN MORTAR Azizah, Titanya; Wahyuni, Ade Sri; Islam, Mukhlis; Gunawan, Agustin; Afrizal, Yuzuar
Inersia: Jurnal Teknik Sipil Vol. 14 No. 1 (2022)
Publisher : Universitas Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/ijts.14.1.28-34

Mortar is material used in non-structural elements. The increasing of quality of the mortar can be obtained by adding other alternative materials to its constituent materials. The materials that have pozzolan characteristic can increase the compressive strength of the mortar. Fly ash has a pozzolan characteristic and contains silica so that it can be used as an additive to cement. This study aims to know the compressive strength of mortar by using fly ash as the additional material of cement with the ratio of cement to fine agregate were 1pc : 3ps on 14, 21, and 28 days. The sample of the mortar is a cuboid sized 50mm x 50mm x 50mm. The variations of fly ash used were 5%, 10%, 15%, and 20% with 7 samples in each variations. The range of initial flow values was between 105%-115% (SNI 03-6882-2002). The biggest compressive strength value for normal mortar is 11.15 MPa and the biggest compressive strength for the variation of mortar is 14.43 MPa at 15% variation at 28 days. The percentage increase in the compressive strength of the mortar is 29,48% from normal mortar.

Co-Authors abimanyu, febriyan Afrizal, Yuzuar Angky Puspawan angky, puspawan Azizah, Titanya Bismantolo, Putra CAHAYA, TIARA Edriani, Annisa Fitria FA, A. Sofwan firdaus, wahyu hadi, faizal Harahap, Abeng Andhika Pratama Hasanah, Era Rizky Islam, Mukhlis Manullang, Hotmalina Mubarok, Abdul Latif Nova Novita Nurul Iman Supardi Pascasari, Auliarizky Razali, Makmun Reza Sihombing, Adi Putra Sulthan, Rifki Supriani, Fepy Wahyuni, Ade Sri Yulianty, Chindy Zuliantoni, Zuliantoni

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