Jurnal Ilmiah Poli Rekayasa
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PEMANFAATAN PASIR/KERIKIL SISA PENAMBANGAN BATU KAPUR PADA CAMPURAN PAVING BLOCK
Full text linkPemanfaatan Pasir dan Kerikil Sisa Penambangan Batu Kapur pada Campuran Paving Block merupakan salah satu bentuk inovasi dalam pemanfaatan limbah (bahan sisa). Penelitian ini diharapkan mampu menjadi salah satu solusi dalam memanfaatkan material sisa yang terbuang menjadi material yang memiliki nilai ekonomis dan sesuai standar paving block. Pembuatan sampel paving block dengan pasir dan kerikil silika menggunakan cara studi literatur, persiapan material, pengujian properties pada material, merencanakan campuran dan pembuatan benda uji dengan beberapa variasi, pengujian kuat tekan benda uji, serta menganalisis data yang didapatkan. Standar yang digunakan ialah SNI 03 – 0691 – 1996. Tujuan dari pembuatan paving block dan beton dengan pasir dan kerikil silica dari penambangan batu kapur ini adalah produk inovatif yang bisa diproduksi massal dan bernilai jual ekonomis, yang bisa dilakukan oleh masyarakat sebagai bentuk usaha ekonomi kecil yang bisa menambah pemasukan bagi masyarakat. Metoda yang digunakan dalam penelitian ini adalah metoda eksperimen di laboratorium beton teknik sipil Politeknik Negeri Padang, dengan melalui serangkaian uji material masing-masing agregat kasar dan halus, baik pasir silica dan kerikil silica, maupun pasir alami dan kerikil alam yang digunakan, apakah sesuai dengan standar yang dipersyaratkan. Berdasarkan hasil pengujian kuat tekan pada umur 21 hari diperoleh kuat tekan tertinggi sebesar 15,134 MPa
PEMBUATAN MESIN PENYEMPROT HAMA KAPASITAS 10 L MENGGUNAKAN SUMBER LISTRIK SOLAR PANEL
No full textHama adalah hewan yang mengganggu atau merusak tanaman sehingga pertumbuhan dan perkembangan pada tumbuhan terganggu. Hama bisa merusak tanaman secara langsung maupun tidak langsung. Dalam penanganan hama ini petani masih menggunakan alat penyemprot hama manual, adapun alat semprot elektrik, baterainya tidak bertahan lama. Untuk mengurangi masalah dalam penanganan hama ini penulis membuat mesin penyemprot hama kapasitas 10 L menggunakan sumber listrik solar panel.Dalam pembuatan mesin penyemprot ini komponoen – komponen utama mesin ini adalah panel surya 50 wp, SCC 10 A, baterai/aki 20 AH, pompa dc 12 V. Panel surya digunakan untuk sumber listrik dari mesin ini, energi listrik yang dihasilkan akan di simpan di aki dan di control oleh SCC. Energi listrik yang telah di simpan di aki akan digunakan untuk menghidupkan pompa yang berfungsi untuk memompakan air dalam tabung, di aliri ke selang dan stick sprayer untuk melakukan penyemprotan.Dari hasil pengujian didapat data panel surya dengan nilai rata – rata I sebesar 1,25 A, rata – rata V 12,33 Volt. Lama ketahanan baterai adalah 12 jam 56 menit, juah penyemprotan 2 meter dan lama waktu penyemprotan adalah 9 menit 30 deti
PENGARUH KARAT TERHADAP KETANGGUHAN MARETIAL BAJA UNTUK JEMBATAN
Full text linkRust is a major problem in steel bridge construction because it has the potential to affect the integrity of the structure and is also an important consideration for inspection and maintenance programs. This study shows the results of laboratory tests on the effect of rust within 1 to 9 weeks on fracture toughness as one of the important mechanical properties of steel bridge elements. The specimens in this study were made of SM 490 type, steel commonly used for bridge construction. Rustless and rusted specimens were used with varying degrees of exposure after immersion in acid solution to simulate the rate of rust. The effect of rust rate on fracture toughness due to mass loss was studied. The fracture toughness of each specimen was monitored for those specimens with exposure periods of 1 week, 2 weeks, 3 weeks, 4 weeks, and 9 weeks to test their effect on toughness. The results of this study showed that there was no significant reduction in the rusting duration of 1 week, 2 weeks, 3 weeks, 4 weeks, and 9 weeks of fracture toughness. Rusting and testing activity for the long term is still ongoing and will be continued, as the results of this study greatly help bridge designers and asset managers to better model rust inspection and maintenance plans and assess the structural integrity of steel bridges affected by rust more accurately
DETEKSI KETIDAKSEIMBANGAN TEGANGAN PADA TRANSFORMATOR DISTRIBUSI BERBASIS SENSOR PZEM-004T TERNOTIFIKASI BUZZER
Full text linkAbstract
The distribution transformer is part of the distribution system, the transformer that is closest to the customer, if there is a problem with this transformer, the customer will immediately feel it. So to ensure the availability of electricity distribution, this transformer requires periodic maintenance and service. Detection of distribution transformers by detecting an imbalance of voltage and oil temperature in the transformer. To get the voltage and current values using the PZEM-004T sensor and for the transformer oil temperature value with a temperature of DS18B20 which will be forwarded to the LCD screen via the Arduino Uno platform. For the average value of the voltage obtained is 65V. this tool successfully reads the output of current, voltage and transformer oil temperature well with an average error of 0.74% at the maximum current reading in phase T. The system can provide information if there is a voltage imbalance, for voltage imbalance the largest error percentage is obtained. in Phase R of 6.31%. The voltage imbalance should not be more than 2.5% so that the voltage value that is read on the R phase exceeds the capacity of the voltage imbalance which causes a voltage imbalance disturbance in the T phase and the display of the value that is read on the LCD will appear the words "Not Normal Voltage" and marked with his life buzzer
MODIFIKASI MESIN PENGUPAS KULIT KOPI KAPASITAS 241 KG/JAM
Full text linkProcessing of coffee skin peelers generally still uses manual or semi-mechanical peelers and to overcome this, a mechanical coffee peeler driven by a gasoline motor is needed. The purpose of modifying this coffee skin peeler machine is to find the perfect tools that have been made previously. This machine modification is expected to help the process of peeling the coffee skin so that it can improve the quality of the coffee. The implementation method for modifying the coffee peeler machine starts with the plan, preparing the construction materials for machines, gasoline motors, gears and chains, peeling rollers, push rollers, iron plates and elbow plates. The next stage is assembling the machine and the engine position. The process ends with testing the tool, data analysis, and concluding the results of the tool. The result of specification this modified coffee peeler machine is capable to peel the coffee skin until 241.2kg/hour. The engine dimensions are 74 mm x 31 mm x 105 mm, using a gasoline motor of 1 hp 2800 rpm, the frame uses an elbow profile of 30 x 30 x 3 mm, the transmission system uses 2 pulleys D = 75 mm and 200 mm connected to a type A v-belt -54
MANAJEMEN PEMELIHARAAN GEDUNG E, G, K DAN V POLITEKNIK NEGERI PADANG
Full text linkBuilding maintenance is a very important to do after a building is completed or used. Maintenance makes of the building longer, safety, strength and appearance. Maintenance can reduce damage to the building, comfort and safety for all building users. Analysis of the maintenance management buildings E, G, K and V Politeknik Negeri Padang for 2023, maintenance schedule for buildings E, G, K and V Politeknik Negeri Padang for structural, architectural and utility components is divided daily, weekly, monthly and yearly intervals. Time periode, daily maintenance includes work on floors, walls, ceilings, doors, windows, frames, clean water installations, security installations, sanitary equipment and electrical installations. Maintenance periode of weekly and monthly intervals includes the work of structures, floors, walls, doors, frames, clean water installations and air conditioning installations. Annual periodic maintenance includes work on structures, walls, ceilings, doors, frames, air conditioning installations, fire protection installations and security installations. The maintenance cost of buildings E, G, K and V Politeknik Negeri Padang Rp. 810,834,743.17 with the cost of structural components of Rp. 84,443.56, architectural components of Rp. 651,660,899.61 and utility components of Rp. 159,089,400.00.
Keywords: Buildings, Maintenance, Time periode, Cos
ORGANIC WASTE COMPOST PROCESSING USING ARDUINO-BASED AUTOMATED MACHINES
Full text linkCompost is an important organic fertilizer in agriculture. Compost comes from weathering / decomposition of waste such as leaves. In the composting process, it can occur naturally but requires a longer time because during the decomposition process the temperature can change so that the performance of microorganisms that decompose waste decreases. The Arduino-based automatic machine is designed to maintain the temperature during the composting process. There are two types of systems used in composting machines. The first composting machine uses an automatic system that works every 3 hours to stir the waste in the tube while the second machine uses the system to work when the temperature detected by the DS18b20 sensor in the tube increases. In the second engine system the highest temperature is set at 38˚C. If the temperature in the tube increases and exceeds the temperature limit that has been set, the motor will work to stir the waste until the temperature in the tube drops. The results of the compost feasibility test on the first machine obtained a pH value of 5.84; Nitrogen 9.67%; Organic carbon 16.33%; C/N ratio 16.90; while the second machine obtained a pH value of 5.60; 8.60% Nitrogen; 17.89% organic carbon; C/N ratio 20.8
PERANCANGAAN MESIN PENGERING MINYAK KAPASITAS 10 KG
No full textRepeated heating of paml oil has a greater effect to produce high levels of trans fat. The excess consumsion of food contained trans fat is couse of diabetes and coronary heart diseas. The oil spinner machine of 10 kg capacity are proposed to overide this problem because it is able to throw the oil particles out from the fried food caused by centrifugal force. The drying area is a 50 cm long tube having diameter of 40 cm which is driven by an electric motor single-phase 1 Hp 1400 rpm. In order to increase the speed of the drying tube into 2800 rpm, a 6 inch diameter pulley attached to the motor shaft while a 3 inch is mounted on a 10 cm diameter drying tube shaft. The two pulleys are connected by means of an open belt drive with a length of 60 inch and 187,480 the contact angle
ANALISIS PENGARUH PENGGUNAAN PASSIVE SPLITTER PADA OPTICAL DISTRIBUTION POINT (ODP) TERHADAP KINERJA JARINGAN DI RUMAH PELANGGAN
Full text linkIn this study, a comparison was made of the attenuation values of passive splitters 1:8 and 1:16 in Optical Distribution Points (ODP). Perform several measurements at the ODP using an Optical Light Source paired with a Passive Splitter 1:4 and 1:8 to become input power at the Optical Distribution Cabinet (ODC) and measure the output from the Passive Splitter 1:8 and Passive Splitter 1:16 at the ODP using Optical Power Meter (OPM) as a measuring tool with a cable length parameter of 100 meters. The measurement results using the OPM are smaller than the calculations with the Power Link Budget, with the measurement results of the passive splitter 1:8 on ODP with measurements made at the rosette obtained attenuation of -19.78 dBm and the results of measurements on passive splitter 1:16 on ODP with measurements carried out in the rosette the attenuation is -23.57, from these results it can be said that the use of passive splitters with excess needs can be used with replacement of passive splitters that have more capacity
Analisa Kajian Penggunaan Alat Berat Pada Pekerjaan Tanah Proyek Pembangunan Jalan (Studi Kasus : Zona I Pada Proyek Pembangunan Jalan Tol Padang-Pekanbaru By Pass Km 25)
No full textA project work rarely runs smoothly, usually there will be some obstacles. Excavation, stockpiling, and compaction work is an early stage of road construction that requires heavy equipment assistance. One of the causes of problems that usually arise in earthworks using heavy equipment is in the form of an operator who is not skilled. This study aims to calculate the productivity, cost and time of heavy equipment and calculate the composition of heavy equipment usage. The method used in this study was to collect primary and secondary data. The results of the calculated analysis show that the most efficient composition is in the third alternative, namely 2 Excavators 676.04 m³ / day, 5 Dump Trucks 260.75 m³ / day, 2 Bulldozers; 807.93 m³ / day, 2 SheepFoot Rollers; 1215.90 m³ / day, 2 Vibration Rollers; 1215.90 m³ / day, and 3 Water Tanker Trucks; 479.99 m³ / day with a total cost of IDR 2,131,752,569.2