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All Journal Teras Jurnal International Journal of Engineering, Science and Information Technology Malikussaleh Journal of Mechanical Science Technology TECHSI - Jurnal Teknik Informatika International Journal of Multidisciplinary Approach Research and Science
Yulius Rief Alkhaly
Universitas Malikussaleh
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Optimization of Small Run-of-River Hydropower Plant Capacity Khairullah Yusuf; Yulius Rief Alkhaly; Amalia Amalia
International Journal of Engineering, Science and Information Technology Vol 2, No 3 (2022)
Publisher : Master Program of Information Technology, Universitas Malikussaleh, Aceh Utara, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (341.353 KB) | DOI: 10.52088/ijesty.v2i3.290

Abstract

The small hydropower plant with a run-of-river concept are being increasingly adopted in less developed and developed countries. The optimization of the plant capacity is critical in the successful development of the plant. The adoption of the current technology will assist in the optimization of the plant development. The important criteria in the evaluation of the optimization are the energy output and plant factor of the plant. In this study, twelve scenarios by varying the installed capacity in range of 4MW to 7.5MW has been simulated in order to obtain the most optimum installed capacity of the plant. In respect to the installed capacity, by the adopting the same available net head of 246.75 m, the design flow would be in range of 1.872 m3/s to 3.510 m3/s with the probability of the flow exceeds or equal to the design flow in range of 29.2% to 8.9%. In the energy calculation, the amount of 0.063 m3/s has been deducted from the available daily flow for the ecological flow. It shows that the energy output for the plant 4MW and 7.5MW would be in range 23 589 MWhr to 28 636 MWhr, respectively. The plant factor of the plant based on all the scenarios are 67.32% for the 4MW plant and 43.59% for the 7.5MW plant. Based on the hydraulic parameters, it was found that the most suitable type of turbine for the plant would be pelton turbines. Based on the relationship between installed capacity, energy output and plant factor, it concludes that the optimum installed capacity is at 5 MW plant.
Experimental Study on Utilizing Polyethylene Terephthalate Waste as a Substitute for Coarse Aggregate in the Production of Lightweight Concrete Yulius Rief Alkhaly; Yovi Chandra; Lis Ayu Widari
International Journal of Engineering, Science and Information Technology Vol 3, No 2 (2023)
Publisher : Department of Information Technology, Universitas Malikussaleh, Aceh Utara, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52088/ijesty.v3i2.436

Abstract

Concrete is a building material that consists of a mixture of aggregate and paste. Normal concrete has a unit weight of 2200 kg/m3 to 2500 kg/m3. In addition to normal concrete, lightweight concrete is also known which has a unit weight of less than 1900 kg/m3. The research was conducted to produce lightweight concrete by using aggregate from polyethylene terephthalate (PET) plastic waste as a substitute for coarse aggregate. This study used 40 cylindrical samples of 150 mm x 300 mm with variations in the use of PET aggregates of 25%, 50%, and 100% of the volume of coarse aggregate. The results show that the use of PET aggregates produces concrete with a decrease in compressive strength of 26%–39% and a decrease in water absorption of 2%–32% from normal concrete. Ultrasonic Pulse Velocity (UPV) testing showed that the concrete with PET aggregates had a lower wave propagation velocity compared to normal concrete. Moreover, Schmidt hammer and splitting tensile test showed that concrete with PET aggregates had lower rebound number and split tensile strength compared to normal concrete. PET substitution percentages of 25% and 50% resulted in unit weights of 2218 kg/m3 and 2102 kg/m3, respectively, which rule out the use of lightweight concrete. However, 100% PET substitution has a unit weight of 1855 kg/m3 with a compressive strength of 14.16 MPa, which can be categorized as moderate structural lightweight aggregate concrete.
Utilizing Crushed Clinker Brick Waste as Coarse Aggregate to Produce Concrete With Compressive Strengths Up to 40 Mpa by Adjusting The Gradation Curve Yulius Rief Alkhaly; Khairullah Khairullah; zulfhazli zulfhazli; Ainun Mardiah; Deddy Ariska
International Journal of Engineering, Science and Information Technology Vol 3, No 1 (2023)
Publisher : Department of Information Technology, Universitas Malikussaleh, Aceh Utara, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52088/ijesty.v3i1.437

Abstract

Aggregate gradation is measured by determining the percentage of various particle sizes in an aggregate sample using a standard sieve arrangement. Gradation is usually expressed as a curve showing the percentage of each particle size on a logarithmic scale. This curve can then be used to determine the optimum mix design for a given concrete grade. The purpose of this research is to determine the effect of adjusting the gradation of the coarse aggregate of crushed clinker bricks on the strength of concrete. Clinkers bricks are bricks that have been burned at temperatures that are excessively high. The coarse aggregate grading is adjusted according to aggregate grading limits based on SNI 7656-2012, which are divided into three types of grading limits, namely upper, middle, and lower limits. A total of 60 cylindrical 150mm x 300mm concrete specimens were used for the compressive strength tests. The findings showed that adjusting the lower limit gradation produced optimum compressive strengths of 29.09 MPa, 35.08 MPa, 39.96 MPa, and 38.82 MPa, respectively, for the specified target concrete strengths of 20 MPa, 25 MPa, 30 MPa, and 35 MPa, which were higher than those of the middle and upper limit gradations. The compressive strength and density of the concrete can be significantly improved by modification of the coarse aggregate grading of the clinker bricks
HUBUNGAN KUAT PANTUL ALAT SCHMIDT HAMMER TERHADAP KUAT TEKAN BETON YANG MENGANDUNG TEPUNG KACA Yulius Rief Alkhaly; Lis Ayu Widari; Fitriani Fitriani
TECHSI - Jurnal Teknik Informatika Vol 12, No 2 (2020)
Publisher : Teknik Informatika Universitas Malikussaleh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/techsi.v12i2.9182

Abstract

Salah satu sumber masalah lingkungan yaitu limbah kaca baik itu dari industri maupun rumah tangga. Kaca merupakan salah satu sampah inorganik yang sangat berbahaya karena kaca tidak dapat membusuk. Pada penelitian ini akan difokuskan pada pemanfaatan limbah kaca yang berbentuk botol sirup berwarna putih yang dihaluskan menjadi tepung kaca sebagai material substitusi semen dalam pembuatan beton normal. Penilitian ini dilakukan dilaboratorium Universitas Malikussaleh. Botol kaca yang digunakan berasal dari Krueng Mane Aceh Utara, kemudian dihaluskan sehingga lolos saringan no.200. Kuat pantul dan kuat tekan dilakukan terhadap sampel benda uji berbentuk silinder dengan ukuran 15cm x 30cm sebanyak 12 benda uji, dengan faktor air semen yang digunakan 0.435. Semen yang digunakan adalah produksi Andalas Tipe I. Substitusi tepung kaca dengan semen dilakukan sebesar 0%, 10%, 15%, 20% yang masing-masing sampel tersebut diuji pada umur 28 hari. Dari hasil pengujian kuat pantul beton normal (BN) didapat 34.58 Mpa, untuk beton BK1 (10%), BK2 (15%), BK3 (20%) didapat hasil kuat pantul masing-masing 29,44 Mpa, 30,24 Mpa, 31,08 Mpa. Sedangkan dari hasil pengujian kuat tekan untuk sampel BN didapat 26,23 Mpa, dan untuk sampel  BK1, BK2, BK3 didapat hasil kuat tekan masing-masing 25,85 Mpa, 25,48 Mpa, 24,53 Mpa. Hubungan kuat pantul dengan kuat tekan dapat dinyatakan dengan persamaan: untuk sampel BN, y = 2.1088x – 46.885 (R2= 0.8414), untuk sampel BK1, y = 1.1645x – 8.4059 (R2= 0.9635), untuk sampel BK2,  y = 1.1917x – 10.385 (R2  = 0.9994), untuk sampel BK3, y = 0.924x - 4.1922  (R2 = 0.9293). Hasil pengujian kuat pantul dan kuat tekan beton menunjukkan penurunan yang tidak signifikan. Kuat pantul mengalami penuruannya sebesar 11% - 15%, sedangkan untuk kuat tekan penurunannya sebesar 2% - 7%.
Sifat Mekanis Beton Beragregat Kasar Peluru Plastik Yulius Rief Alkhaly
Malikussaleh Journal of Mechanical Science and Technology Vol 6, No 3 (2022): Malikussaleh Journal of Mechanical Science and Technology
Publisher : Malikussaleh University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/mjmst.v6i3.11027

Abstract

The purpose of this research is to investigate the feasibility of using bullet plastic as coarse aggregate or as a substitute for air bubbles in the production of lightweight concrete. The mechanical properties of plastic bullet-aggregated concrete substituted with 25%, 50%, 75%, and 100% of the gravel volume were evaluated experimentally. The mechanical properties tested were compressive strength, split tensile strength, and flexural strength. The test results show the mixture of 75% and 100% plastic bullets yields an acceptable density value as a lightweight concrete, with compressive strengths of 15.56 MPa and 14.94 MPa. These findings suggest that using plastic bullets as coarse aggregate or as a replacement for air bubbles is feasible regarded to American Concree Institute (ACI).
HUBUNGAN NILAI KUAT PANTUL ALAT SCHMIDT HAMMER TERHADAP KUAT TEKAN BETON AGREGAT BOLA PLASTIK Alkhaly, Yulius Rief; Mukhlis, Mukhlis; Wardani, Putri Kusuma
TECHSI - Jurnal Teknik Informatika Vol 12, No 2 (2020)
Publisher : Teknik Informatika Universitas Malikussaleh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/techsi.v12i3.9195

Abstract

Beton ringan adalah beton yang memiliki densitas lebih kecil dari beton pada umumnya. Padapenelitian ini, telah dihasilkan suatu beton ringan yang menggunakan bola plastik sebagaiagregat kasar. Pengujian terhadap beton agregat bola plastik (BP) dilakukan melalui uji kuatpantul dan uji kuat tekan. Penelitian dilakukan di Laboratorium Teknik Sipil UniversitasMalikussaleh. Benda uji dibuat sebanyak 12 buah berbentuk silender 15 cm x 30 cm, bolaplastik digunakan berdiameter 6 mm. Pada perencanaan campuran beton, agregat kasardigantikan dengan bola plastik sebesar 25%, 50%, dan 100% pada perbandingan volume. Fasyang digunakan 0.48, dengan bahan pengikat: semen Andalas type I. Dari hasil pengujiandiperoleh: untuk kuat pantul beton normal (BN) didapat 32,43 Mpa, untuk kuat pantul betonringan 25% (BP1) didapat 24,39 Mpa, untuk kuat pantul beton ringan 50% (BP2) didapat 22,61Mpa, dan untuk kuat pantul beton ringan 100% (BP3) didapat 20,56 Mpa. Sedangkan hasilpengujian kuat tekan untuk sampel BN didapat 24,72 Mpa, dan untuk sampel BP1, BP2, BP3,didapat hasil kuat tekan masing-masing 17,17 Mpa, 14,91 Mpa, 12,08 Mpa. Hasil nilai kuatpantul dan kuat tekan beton BP menunjukkan penurunanan yang signifikan dari pada nilai kuatpantul dan tekan beton normal. Sedangkan densitas kuat tekan beton BP juga menunjukkanpenurunan yang signifikan dari pada densitas kuat tekan beton normal. Hubungan nilai kuatpantul dan kuat tekan beton dapat dinyatakan dengan persamaan: untuk sampel BN, y =1.4402x – 3.1672, ( R2= 0.9595), untuk sampel BP1, y = 4.677x – 55.926, ( R2= 0.9874), untuksampel BP2, y = 0.2182x + 19.36, ( R2= 0.9839), dan untuk sampel BP3, y = 0.7412x + 11.509, (R2= 0.592). Selanjutnya beton dengan sampel BP1 dan BP2 tidak dapat dikategori sebagaibeton ringan, karena densitasnya masing-masing sebesar 2380 kg/m3 dan 2144 kg/m3.Sedangkan beton dengan BP3 dapat di kategorikan sebagai beton ringan, BP3 mempunyaidensitasnya 1724 kg/m3. Dengan demikian agregat bola plastik berpotensi sebagai agregatuntuk pembuatan beton ringan dengan mutu 12 Mpa. Kelas mutu tersebut tergolong kedalambeton ringan non struktural.
PENGARUH VARIASI JENIS MATERIAL FILLER PADA CAMPURAN ASPAL BETON TERHADAP PARAMETER MARSHALL Alkhaly, Yulius Rief; Fadhliani, Fadhliani; Faisal, Rahmad
TECHSI - Jurnal Teknik Informatika Vol 12, No 2 (2020)
Publisher : Teknik Informatika Universitas Malikussaleh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/techsi.v12i3.9193

Abstract

Berdasarkan hasil penelitian yang telah dilakukan di Laboratorium Teknik Sipil yangbertempat di Bukit Indah, maka Kadar Aspal Optimum (KAO) yang digunakan adalah 6,5%untuk campuran aspal beton AC-WC dengan menggunakan abu sekam padi, serbuk kaca danbatu apung sebagai bahan filler modifikasi pengganti filler standar menurut spesifikasiDepkimpraswil (2002). Dari hasil pengujian parameter Marshall menunjukkan bahwapenggunaan batu apung dapat menghasilkan nilai stabilitas tertinggi yaitu 855 kg dari padapenggunaan abu sekam padi dengan hasil 845 dan serbuk kaca yang menghasilkan 830, untuknilai flow tertinggi pada penggunaan serbuk kaca yaitu 3,65 mm. Sedangkan nilai MQ tertinggidihasilkan pada penggunaan abu sekam padi yang mampu menghasilkan nilai MQ 270kg/mm. Penggunaan abu sekam padi, serbuk kaca dan batu apung dapat digunakan untukmenggantikan filler standar dalam campuran aspal beton AC-WC menurut SpesifikasiDepartemen Permukiman Prasarana Wilayah 2002.
Analysis of Flood Peaks Using The Mean Annual Flood Method Hidayat, Acep; Basysyar, Basysyar; Rief Alkhaly, Yulius; Bin Ali, Md Nadir
International Journal of Engineering, Science and Information Technology Vol 2, No 2 (2022)
Publisher : Department of Information Technology, Universitas Malikussaleh, Aceh Utara, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (799.519 KB) | DOI: 10.52088/ijesty.v2i2.249

Abstract

The Kedang Pahu river is one of the tributaries of the Mahakam river. The research plan is located in Damai District, West Kutai Regency, East Kalimantan province. Recently, the Damai District and Damai Seberang areas have flooded activities that have caused the surrounding settlements to flood into residential areas and block existing road access. Planning analysis and knowing the annual flood elevation is essential. The analysis uses the method of calculating the mean annual flood (MAF) to search for the average annual flood discharge data and the search for the average annual elevation. Data validation using a simple linear regression method produces a correlation coefficient of 58.67%, or R-value = 0.5867. The analysis results in the value of Q1 or the 1st year period, the mean annual flood rate of the average annual flood discharge is 2576.0695 m³/second and the value associated with the magnifying factor (GF) is the average annual flood discharge rate of Q5=3014,00 m³/ sec, Q10 = 3529.22 m³/sec, Q20 = 4095.95 m/sec, Q50 = 5049.10 m³/sec, Q100 = 5847.68 m³/sec, Q200 = 6852.34 m³/sec, Q500 = 8423.75 m³/sec Q1000 = 9917.87 m³/sec. The analysis results at HEC-RAS 5.07 based on manning analysis showed the elevation values were Q1=18.47m, Q5=18.85m, Q10=18.86m, Q20=19.18m, Q50=19.74m Q100=19.99m. Researchers only show elevations up to Q100 or the 100th year because of limited data and the reviewed data accuracy.
Analysis of Factors Affecting the Effectiveness of Road Maintenance in Pidie Regency Yanis, Muhammad; Hamzani, Hamzani; Alkhaly, Yulius Rief
International Journal of Engineering, Science and Information Technology Vol 4, No 4 (2024)
Publisher : Department of Information Technology, Universitas Malikussaleh, Aceh Utara, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52088/ijesty.v4i4.610

Abstract

Land transportation infrastructure as a medium of accessibility for various community needs that have an important role in economic growth, socio-cultural, political, and other factors of a region or area. In order for road infrastructure to function optimally in improving these factors, several important aspects need to be considered, including having user safety and comfort, environmentally friendly. Land transportation infrastructure is not only a means of mobility but also a tool to achieve better social and economic welfare for the entire community. Given the strategic role of land transportation infrastructure, namely roads, it is very necessary to have security and comfort values so that the efficiency and effectiveness of the infrastructure are indicators to be evaluated. The effectiveness and efficiency of roads are greatly influenced by many factors including road conditions and age, land use, social, economic and policy. community and related parties. The purpose of this study is to analyze the dominant factors that influence the effectiveness of road maintenance in Pidie district. This study uses a qualitative approach to analyze data obtained from respondents which are primary data and the use of SPSS as an analysis tool so that it becomes numerical. The results obtained for the instrument items used are reliable and trustworthy, this is based on the Cronbach's Alpha (CA) value obtained in the range of 0.50 to 0.70. Based on the results and discussions obtained, it can be concluded that all proposed instrument items provide a significant contribution to determining the effectiveness of road maintenance decisions in Pidie Regency with the highest influence instrument factors being economic instruments and road conditions. The coefficient value obtained for the two factors is 5.571 for the economic instrument and followed in second place, namely the road condition instrument item with a coefficient of 3.603.
Optimizing Road Pavement Projects Through Earned Value Concepts Jufriza, Jufriza; Alkhaly, Yulius Rief; Jalil, Abdul
International Journal of Engineering, Science and Information Technology Vol 4, No 4 (2024)
Publisher : Department of Information Technology, Universitas Malikussaleh, Aceh Utara, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52088/ijesty.v4i4.602

Abstract

Every construction project faces constraints of cost, schedule, and quality that must be managed to achieve the desired objectives. This research aims to control the aspects of time and cost in construction projects by applying the Earned Value Concept and Crash Program methods. The subject of the study is the Preservation of Roads and Bridges project in Bireuen City - BTS, Lhokseumawe/Aceh Utara, Krueng Mane Buket Rata, SP. Krueng Geukeueh - PEL. Krueng Geukeueh (PEL. Lhokseumawe). The data analyzed includes the Budget Plan (RAB), project schedule, and reports on planned and actual work. This data is processed into three main indicators: BCWS, BCWP, and ACWP, which are then analyzed through Schedule Variance (SV), Cost Variance (CV), Schedule Performance Index (SPI), and Cost Performance Index (CPI). The analysis results show that during weeks 22 to 23, the project had a positive Schedule Variance (SV) (0), which then turned negative during weeks 24 to 28, with an average Schedule Performance Index (SPI) of 1.0096, indicating that project execution was ahead of schedule. Meanwhile, the Cost Variance (CV) was positive throughout the project, and the average Cost Performance Index (CPI) was 1.2118, indicating that actual costs did not exceed the budget. The application of the Crash Program method resulted in changes in heavy equipment rental costs and worker wages, from IDR 1,440,469,946.99 over 50 days to IDR 1,853,072,988.06 over 25 days, with a cost increase of IDR 412,603,041.07 and an acceleration ratio of 1.29. This research demonstrates that the Earned Value Concept and Crash Program methods are effective in controlling time and cost in construction projects, thereby helping to achieve better efficiency in project management.
Co-Authors Abdul jalil Acep Hidayat Ainun Mardiah Amalia Amalia Basysyar, Basysyar Bin Ali, Md Nadir Cok Nando Panondang Deddy Ariska F Harahap, M Ibnu H Fadhliani, Fadhliani Fahrurrazi Fahrurrazi Faisal, Rahmad Fitriani Fitriani Hamzani Hamzani Jalalul Akbar, Said Jufriadi Jufriadi, Jufriadi Jufriza, Jufriza Khairullah Yusuf Lis Ayu widari Lis Ayu Widari Maizuar Maizuar Meutia Syahfitri Muhammad Yanis Mukhlis Mukhlis Wardani, Putri Kusuma Yovi Chandra Zulfahmi Zulfahmi zulfhazli zulfhazli