Jurnal Qua Teknika https://ejournal.unisbablitar.ac.id/index.php/qua <div class="row"> <div class="col-sm-6 col-md-12"> <div class="img-responsive">Memuat artikel hasil penelitian dan kajian kritis bidang ilmu-ilmu teknik, terapan, rekayasa, teknik elektro, terknik sipil dan aplikasinya.</div> </div> </div> <p>&nbsp;</p> <p>&nbsp;</p> <p>&nbsp;</p> <p>&nbsp;</p> Universitas Islam Balitar Blitar en-US Jurnal Qua Teknika 2088-2424 <div class="page"> <div class="page"> <p>Authors who publish with this journal agree to the following terms:</p> <ol> <li>Copyright on any article is retained by the author(s).</li> <li>Author grant the journal, right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work’s authorship and initial publication in this journal.</li> <li>Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal’s published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.</li> <li>Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work.</li> <li>The article and any associated published material is distributed under the&nbsp;<a href="http://creativecommons.org/licenses/by-sa/4.0/" rel="license">Creative Commons Attribution-ShareAlike 4.0 International License</a></li> </ol> </div> </div> Evaluasi Anggaran Biaya menggunakan Batu Bata Merah dan Batu Bata Ringan Gedung Kantor Kelurahan Bareng Kecamatan Klaten Tengah Kabupaten Klaten https://ejournal.unisbablitar.ac.id/index.php/qua/article/view/635 <p>Light brick is an alternative to making walls in addition to the red brick series used by ordinary people. The purpose of this study is to compare the calculation of budget costs and the need to use red brick walls with light brick walls. The implementation method is to calculate the unit price analysis of the installation of red brick and light brick, the AHS is multiplied by the volume and the RAB is obtained, then the calculated RAB is compared between the two. Conclusion the price of installing a red brick wall pair is Rp. 44,128,086.00. The price of installing a lightweight brick wall pair is Rp. 85,295,824.71. The difference between the two jobs is Rp. 41,167,738.71. The percentage difference between the two jobs is 48.3%.</p> Sely Novita Sari Copyright (c) 2019-03-28 2019-03-28 9 1 1 10 10.35457/quateknika.v9i1.635 Pengaruh Pengujian Hardening pada Baja Karbon Rendah Sebagai Solusi Peningkatan Kualitas Material https://ejournal.unisbablitar.ac.id/index.php/qua/article/view/ejournal.unisbablitar.ac.id <pre id="tw-target-text" class="tw-data-text tw-ta tw-text-small" dir="ltr" style="text-align: left; height: 432px;" data-placeholder="Terjemahan" data-fulltext=""><span tabindex="0" lang="en">Low carbon steel is an alloy consisting of the main elements of carbon with a low composition and iron. The mechanical properties of low carbon steel are influenced by the composition and microstructure of metals. One of the mechanical properties of the metal to be searched for is violence. The purpose of this study is to conduct hardening testing of low carbon steel material. The results obtained from this study are that the hardness of low carbon steel increases with increasing heating temperature. In addition, based on experimental data it is known that salt water cooling media has a higher hardness compared to SAE 10 oil.</span></pre> Nila Nurlina Copyright (c) 2019-03-28 2019-03-28 9 1 11 20 10.35457/quateknika.v9i1.636 Analisis Perubahan Suhu Ruangan Dan Prosentase Pemakaian H2SO4 (Asam Sulfat) Dalam Mempengaruhi Pengujian Ratio Cover Dan Kekuatan Filament Polyester Benang Core-Spun 128 D-Tex Di Mesin Core Spinning Merk Rieter Type G-5 https://ejournal.unisbablitar.ac.id/index.php/qua/article/view/637 <p><strong>ABSTRAK</strong></p> <p>Studi Tentang Pengaruh Variasi Suhu Ruangan Dan Prosentase Pemakaian H<sub>2</sub>SO<sub>4</sub> (Asam Sulfat) Terhadap Pengujian Ratio Cover Dan Kekuatan Filament Polyester Benang Core-Spun 128&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; d-Tex Dari Mesin Ring Core Spinning Merk Rieter Type G 5 / 1 Di PT. Tool Thread Indonesia, Pleret Pasuruan – Jawa Timur</p> <p><strong>Kata Kunci : </strong></p> <ul> <li class="show">Ratio Cover</li> <li class="show">Core-Spun</li> <li class="show">Filament Polyester</li> <li class="show">H<sub>2</sub>SO<sub>4</sub></li> </ul> Ahmad Yufron Copyright (c) 2019-03-28 2019-03-28 9 1 21 30 10.35457/quateknika.v9i1.637 PENGARUH BAHAN TAMBAHAN TEXAPON TERHADAP KUAT TEKAN BETON RINGAN https://ejournal.unisbablitar.ac.id/index.php/qua/article/view/698 <p>Development in the field of construction is very rapid, including in the construction of housing, hospital offices and so on. Concrete as a building material has long been used and widely applied by the community because it has advantages - advantages over other structural materials which have good strength, fire resistance, resistance to weather changes, and are relatively easy in construction. This research was conducted to determine the effect of substitution with Texafone additives on concrete compressive strength. The method used in this study is to make lightweight concrete substitute for texafon additives by 0%, 10% and 30% of the weight of lightweight Concrete sand which has been cured during 7 days later it was tested to get the compressive strength of lightweight concrete. The results showed the value of 0% substitution strength at 7 days is 6.2 Mpa, while an additional 10% is 5.21 Mpa and an additional 30% is 4.51 Mpa.</p> Nurjanah Copyright (c) 2019 Jurnal Qua Teknika https://creativecommons.org/licenses/by-sa/4.0 2019-03-28 2019-03-28 9 1 31 42 10.35457/quateknika.v9i1.698 Analysis of the Effect of Excitation Current on the Synchronous Generator Against Loading on PLTA PJB Up Brantas Wlingi https://ejournal.unisbablitar.ac.id/index.php/qua/article/view/701 <p>This study will discuss the effect of the Wlingi hydropower synchronous generator excitation current on each change of load to keep the nominal outtime voltage of the generator with the changing voltage of 150 kV. Data analysis was obtained from the Wlingi Hydroelectric Daily Operation Report (LHO) in accordance with the changes in generator load or changes in transmission voltage values ​​to determine the effect on changes in AVR excitation currents. The next daily data obtained is compared with the initial setting or characteristics of the AVR when the Commissioning Test, the resulting deviation will be used as input for Engineering UP Brantas in carrying out the next corrective action. Thus the reliability of the Wlingi PLTA in serving P2B to maintain the stability of the Java-Bali 150 kV transmission system is maintained. So that it can contribute to improving company performance.</p> Yudistira Heri Istanto Copyright (c) 2019 Jurnal Qua Teknika https://creativecommons.org/licenses/by-sa/4.0 2019-03-28 2019-03-28 9 1 43 55 10.35457/quateknika.v9i1.701 Karakter Kelistrikan Sistem Growbox Tabung Menggunakan Sel Surya https://ejournal.unisbablitar.ac.id/index.php/qua/article/view/728 <p>Kebutuhan akan produk&nbsp; pertanian dan keterbatasan lahan&nbsp; mengharuskan adanya cara yang lebih intensif untuk bertani. Salah satu solusi dari masalah tersebut adalah menggunakan growbox. Growbox tidak harus berbentuk kotak, tapi bisa berbentuk tabung. Tabung Growbox telah dibuat dengan ukuran tinggi 35 cm, diameter bawah 27 cm dan diameter atas 36,5 cm. Growbox dilengkapi sel surya yang memungkinkannya menangkap sinar matahari di waktu siang hari dan menggunakannya untuk menghidupi lampu di malam hari. Syarat untuk terlaksananya hal ini adalah energi atau daya yang peroleh lebih tinggi daripada yang dikeluarkan. Setelah growbox dibuat, dilakukan pengujian di bagian input dan output menggunakan voltmeter dan amperemeter. Bagian input berupa sel surya dan bagian outputnya led. Hasil pengujian menunjukkan sel surya dapat menghsilkan daya maksimal 142,36 mW dan led mengkonsumsi daya hingga 80,77 mW. Dari daya masukan dan keluaran dapat diperkirakan growbox mampu bekerja terus-menerus tanpa menghabiskan energinya.</p> Teknik QuaTeknika Syamsudin Nur Wahid Copyright (c) 2019 Jurnal Qua Teknika https://creativecommons.org/licenses/by-sa/4.0 2019-03-28 2019-03-28 9 1 57 68 10.35457/quateknika.v9i1.728