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Forum Mekanika
Published by Sekolah Tinggi Teknik PLN
ISSN : 23561491     EISSN : -     DOI : -
Core Subject : Science, Engineering,
Civil Engineering, Building, Construction & Architecture Energy Engineering Industrial & Manufacturing Engineering Mechanical Engineering
FORUM MEKANIKA Journal, especially for Civil Engineering Lecturers and generally for all Practitioners to be able to contribute in the form of scientific writing that will be useful for the application of science and technology, especially in the field of Civil Engineering.
Arjuna Subject : -
Articles 5 Documents
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Search results for , issue "Vol 9 No 1 (2020): JURNAL FORUM MEKANIKA" : 5 Documents clear
Pengaruh Variasi Perendaman Beton Purun Tikus Terhadap Kuat Tekan dan Kuat Lentur Beton Ani Firda Firda; Indra Syahrul Fuad
FORUM MEKANIKA Vol 9 No 1 (2020): JURNAL FORUM MEKANIKA
Publisher : Sekolah Tinggi Teknik - PLN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33322/forummekanika.v9i1.883

Abstract

ABSTRAK Salah satu bahan tambah beton ialah serat (fiber). Serat dalam beton berfungsi untuk mencegah retak–retak sehingga menjadikan beton lebih daktail dari pada beton biasa dan untuk meningkatkan kekuatan tarik beton. Pemakaian beton pada lingkungan agresif sangat berpengaruh pada keawatan dan nilai kuat tekan dan tarik beton. Struktur beton dapat dikatakan berada pada lingkungan agresif manakala beton terus-menerus berada dalam lingkungan air laut, air rawa, tanah, dan kawasan industri dimana banya terkandung sulfat, beton akan menjadi rentan terhadap serangan sulfat yang dapat mengurangi durabilitas beton dan dapat membuat beton menjadi korosi. Oleh karena itu dalam penelitian ini akan meneliti mengenai seberapa besar pengaruh variasi perendaman air PDAM Tirta Musi (pH=7) dan air rawa (pH<7) dan terhadap kuat tekan dan kuat lentur dengan tambahan serat purun tikus (eleocharis dulcis) sebesar 0.75% selama 28 hari. Hasil penelitian menunjukkan bahwa Perendaman beton mutu fc’ = 20Mpa umur 28 hari menggunakan air rawa (pH=4.5), dapat menurunkan kuat tekan beton normal sebesar 11.63%, sedangkan pada beton purun tikus 0.75% sebesar 4.12%, dibanding beton perendaman air PDAM Tirta Musi (pH=6.5). Perendaman beton mutu fc’ = 20Mpa umur 28 hari menggunakan air rawa (pH=4.5), dapat menurunkan kuat lentur beton normal sebesar 14.8%, sedangkan pada beton purun tikus 0.75% sebesar 5.8%, dibanding beton perendaman air PDAM Tirta Musi (pH=6.5). Keywords : pH air, kuat tekan, kuat lentur, serat purun tikus.
Analisa Tingkat Pelayanan dan Perhitungan Tarif Angkutan Umum Penumpang Trayek Ampera-Tangga Buntung Berdasarkan Biaya Operasional Kendaraan Yules Pramona Zulkarnain
FORUM MEKANIKA Vol 9 No 1 (2020): JURNAL FORUM MEKANIKA
Publisher : Sekolah Tinggi Teknik - PLN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33322/forummekanika.v9i1.933

Abstract

Angkutan umum trayek Ampera– Tangga buntung merupakan salah satu angkutan kota yang melayani daerah yang cukup strategis, dilihat dari rute yang menjadi wilayah pelayanannya adalah terminal dan pasar Tangga Buntung, Dermaga penyeberangan Tangga Buntung, kawasan sekolah, perumahan dan berakhir di ikon kota Palembang yaitu Benteng Kuto Besak. Permasalahan yang sering dihadapi oleh pemakai jasa angkutan kota adalah besarnya biaya yang harus dikeluarkan untuk melakukan perjalanan (tarif), biaya waktu tunggu, ketidak nyamanan dan keamanan penumpang , biaya operasional yang harus dikeluarkan untuk mengoperasikan angkutan kota pada tingkat pelayanan tertentu. Penelitian ini membahas Analisa perhitungan tarif angkutan kota berdasarkan Biaya Operasional Kendaraan (BOK) dan tingkat pelayanan angkutan kota trayek Ampera –Tangga Buntung berdasarkan karakteristik pengguna jasa angkyan kota. Berdasarkan hasil pengolahan dan analisis data diketahui bahwa tarif optimum angkutan kota trayek Ampera – Tangga Buntung sebesar Rp.4.200,- dan tarif yang diinginkan konsumen yaitu sebesar Rp.3.000,- pada tingkat pelayanan angkutan kota masih sangat penting dan dibutuhkan oleh masyarakat tetapi perlu peningkatan dan perbaikan sarana dan prasarana untuk kenyamanan dan keamanan pengguna jasa angkutan kotasedangkan jumlah kebutuhan armada angkutan kota yang dibutuhkan sebanyak 17 kendaraan trip pada jam sibuk pagi, pada jam sibuk siang dibutuhkan 9 kendaraan trip dan pada jam sibuk sore dibutuhkan 12 kendaraan trip.
Pemodelan Curah Hujan-Limpasan Pada Sub DAS Cikapundung Hulu Ika Sari Damayanthi Sebayang; Syaefudin Wibowo
FORUM MEKANIKA Vol 9 No 1 (2020): JURNAL FORUM MEKANIKA
Publisher : Sekolah Tinggi Teknik - PLN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33322/forummekanika.v9i1.952

Abstract

The Cikapundung River is one of the rivers that divides the city of Bandung and is often used as the main drainage center of the city, the flow of sewage or waste, tourism objects, and raw water sources. This causes the importance of observing reliable discharge values flowing on the Cikapundung River. In this study the authors analyzed the availability of minimum river discharge in Cikapundung Hulu Sub Das using the FJ Mock method. This study uses rainfall data and climatology data. The rainfall data used are rainfall data from Dago Pakar station and Meteo Lembang station, with a span of 10 years while the climatological data used is data from the Bandung Geophysical Station with a span of 10 years. Mainstay discharge calculated using the F.J Mock Method, where in the F.J Mock calculation there are a number of parameters assumed. This modeling test process is by calibrating the parameters assumed by Trial and Error. The average discharge magnitude for Q50, Q80, Q90, and Q95 in calculating the mock model in the period 2008 to 2014 resulted in a value of 3.87 m³ / sec; 2.98 m³ / sec; 2.46 m³ / sec; and 2.21 m³ /sec. While the discharge values of Q50, Q80, Q90, and Q95 in the observation debit produce successive values of 3.85 m³ / sec; 2.45 m³ / sec; 2.05 m³ / sec; and 1.91 m³ / sec. Even with the increase in the calculation period, reliable debit values have a tendency to rise.
Pengaruh Penggunaan Material Daur Ulang Terhadap Sifat Mekanik Beton Non Pasir Tommy Iduwin; Dicki Dian Purnama; Pratiwi Septyaning Putri; Hastanto Siswo Martono
FORUM MEKANIKA Vol 9 No 1 (2020): JURNAL FORUM MEKANIKA
Publisher : Sekolah Tinggi Teknik - PLN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33322/forummekanika.v9i1.1080

Abstract

Infrastructure development is increasing every year making the need for concrete materials increases. Using alternative materials can reduce the scarcity of material and environmental damage caused by taking and dredging the material. This research is to find out how much influence the recycled material has on the compressive strength of no fines concrete. The variations used are recycled materials of 0%, 25%, 50%, 75% and 100%. Mechanical testing conducted is a compressive strength test to determine the compressive strength of no fines concrete at the age of 7, 14 and 28 days. The ratio of cement and aggregate used is 1: 4 with FAS 0.5. This research uses 15 x 30 cm cylindrical molds with 45 test specimens. The test results show the highest compressive strength value of non-sand concrete occurs at 0% recycled material by 10.47 Mpa and the lowest compressive strength on non-sand concrete 100% recycled material is 8.39 Mpa. The percentage of absorption of no fines concrete shows that the more recycled material is used, the smaller the value of water absorption. The highest absorption value in no fines concrete is 0% recycled material, which is 5.93% and the smallest value is in the variation of no fines concrete 100% recycled material recycled material that is equal to 4.99%.
Pengaruh Penggunaan Bahan Limbah Polimer Sebagai Campuran Aspal Modifikasi Terhadap Kinerja Marshall Indah Handayasari; Irma Sepriyanna Sepriyanna; Dyah Pratiwi Kusumastuti
FORUM MEKANIKA Vol 9 No 1 (2020): JURNAL FORUM MEKANIKA
Publisher : Sekolah Tinggi Teknik - PLN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33322/forummekanika.v9i1.1098

Abstract

One of the polymer materials that can be a mixture of asphalt is Ethylene Vinyl Acetate, which is a material that is widely used in making toys and making footwear. This large amount of toys and footwear production waste has only become rubbish and has not been utilized optimally. Ethylene Vinyl Acetate polymers themselves belong to elastomeric polymers which have flexible properties such as rubber, smooth, flexible, resistant to low temperatures, are not easily cracked and are resistant to water. The use of polymer material as a mixture of asphalt has been widely carried out considering that asphalt modification with polymeric materials is known from several tests showing that it has better resistance to deformation and overcoming cracks, so that road construction can be produced more durable and can reduce maintenance and repair costs Street. In this study the use of Ethylene Vinyl Acetate waste on asphalt mixes has a pretty good effect, this is seen from the results of marshall tests that can meet the requirements.

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