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All Journal JURNAL POLI-TEKNOLOGI Journal of Scientech Research and Development
Pramudya Kurniawan
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Aerospace Engineering Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Social Sciences Transportation

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PERBANDINGAN KUAT TEKAN BETON MENGGUNAKAN BATU PECAH DAN BATU BULAT SUNGAI SIBAU DI PUTUSIBAU H. Zeldi Muhardi; Pramudya Kurniawan; Wandi Rusfiandi
Journal of Scientech Research and Development Vol 5 No 2 (2023): JSRD, December 2023
Publisher : Ikatan Dosen Menulis

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56670/jsrd.v5i2.230

Abstract

Untuk memahami sifat beton, perlu dipahami karakteristiknya. Sebagian masyarakat di sekitar Sungai Sibau menggunakan batu bulat sebagai campuran beton, meskipun dalam bidang teknik sipil hal ini tidak diperbolehkan karena batu bulat tidak sebaik batu pecah. Namun, batu pecah memiliki harga yang cukup mahal karena diproses menggunakan stone crusher. Di sekitar Kota Putusibau, Sungai Sibau memiliki deposit batu kerikil yang cukup banyak. Batu di sungai ini tampaknya cukup baik sebagai bahan campuran beton, begitu pula dengan pasirnya. Perbedaan harga antara batu pecah dan batu bulat cukup signifikan, sehingga penting untuk mengetahui perbedaan mutu beton yang menggunakan kedua jenis batu tersebut. Pertanyaan pentingnya adalah apakah penggunaan batu bulat dari Sungai Sibau tanpa diproses terlebih dahulu diperbolehkan dan layak untuk digunakan dalam konstruksi beton? Seberapa besar penurunan kekuatan tekan beton jika menggunakan batu bulat? Apakah batu dari Sungai Sibau ini memiliki tingkat kekerasan yang cukup baik untuk digunakan sebagai bahan beton? Dapatkah batu bulat langsung dicampur dengan semen dan pasir untuk membuat beton tanpa diproses terlebih dahulu? Dapatkah mutu beton K 225 tercapai jika menggunakan batu bulat ini? Penelitian ini bertujuan untuk membandingkan kuat tekan kubus beton yang menggunakan batu pecah dengan kubus beton yang menggunakan batu bulat dari Sungai Sibau tanpa diproses terlebih dahulu, dengan melakukan analisis dan perbandingan hasil dari uji kuat tekan keduanya.
Comparison of Artificial Water Pump Drive Models Zuraida, Ida; Pramudya Kurniawan; Wattini
Jurnal Poli-Teknologi Vol. 23 No. 3 (2024)
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/pt.v23i3.6446

Abstract

Starting from a printed water filter that uses an electric water pump, we tried to make a breakthrough by making an artificial pump using wind energy. Wind energy requires an appropriate drive model. Two driving models were tried and then compared between the two to get the best model to be applied as a recommendation for the wider community. In the initial stage, model design was carried out, both an artificial pump model and a driving model with two variations. Next, prepare the necessary materials, then make the model. For pump models from PVC pipes, drive models from plastic drums and drive models from mineral bottles as well as supporting system models. The supporting system is a network of intake pipes to the pump system and from the pump to the reservoir. Then the final step is to make a tower model from light steel with a height of approximately 10 meters. All models made such as custom pumps and drive models need to be tested to ensure whether the model can function properly. Apart from that, it is also necessary to evaluate if there are obstacles so that it can function optimally. Next, data collection and analysis of existing data is carried out. The final step is to draw a conclusion regarding the model being made and choose the best drive model with all its advantages and disadvantages. Based on nine trials by rotating the drive models (2 models) manually, a conclusion can be drawn that Drive Models 1 and 2 can rotate well, the crank also functions well and the artificial pump after evaluation is finally functional and able to drain as much water as possible. 0.38 liters per one revolution of the drive model. The volume of water obtained is the maximum capacity based on a comparative calculation of the volume of the pump tube of 0.34 liters. Both Drive Models can be raised to a higher level of 5 meters or 10 meters for strong wind gusts. However, because the area where the research was conducted, the wind gusts were protected by tall buildings, so the results were not optimal.
Co-Authors H. Zeldi Muhardi Ida Zuraida, Ida wandi Rusfiandi Wattini