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All Journal REKA RACANA Jurnal Ilmiah MITSU (Media Informasi Teknik Sipil Universitas Wiraraja) JPM17: Jurnal Pengabdian Masyarakat KURVATEK
Bantot Sutriono
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Arts Humanities Civil Engineering, Building, Construction & Architecture Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Electrical & Electronics Engineering Engineering Environmental Science Social Sciences Transportation

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Pengaruh Bahan Tambah Gula Pasir Terhadap Waktu Pengikatan dan Kuat Tekan Retno Trimurtiningrum; Bantot Sutriono; Billy Arrowrichta; Hiasintus Bertus Watu; Misrawi Misrawi
RekaRacana: Jurnal Teknil Sipil Vol 6, No 1: Maret 2020
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/rekaracana.v6i1.1

Abstract

ABSTRAKDalam pelaksanaan pembangunan konstruksi beton, seringkali ditemui beberapa kendala, seperti lokasi batching plan yang berbeda dengan lokasi proyek serta tingginya temperatur saat pengecoran, sehingga dapat mempercepat waktu pengikatan beton. Untuk mencegah waktu pengikatan lebih awal, diperlukan bahan tambah kimia yang dapat memperlambat waktu pengikatan yaitu retarder. Akan tetapi, bahan tambah kimia mempunyai harga yang relatif tinggi. Oleh karena itu, pada penelitian ini digunakan gula sebagai bahan tambah alternatif, karena gula merupakan salah satu penyusun dalam komposisi retarder serta mempunyai harga yang cukup ekonomis. Persentase gula pasir yang digunakan bervariasi, yaitu 0% (sebagai benda uji kontrol); 0,03%; 0,05% dan 0,1%. Hasil pengujian menunjukkan waktu pengikatan terlama diperoleh campuran dengan persentase gula sebanyak 0,1% dengan waktu ikat awal 157 menit dan waktu ikat akhir 258 menit, sedangkan hasil pengujian kuat tekan maksimum sebesar 225,38 kg/cm2 diperoleh campuran dengan persentase gula sebanyak 0,05%.Kata kunci: waktu pengikatan, gula, kuat tekan, retarderABSTRACTIn concrete construction process, several obstacles are often to be encountered such as the location of the batching plan that is different from the project location, as well as the high temperature while casting causes the acceleration of concrete setting time. To prevent earlier setting time, chemical admixture which can slow down the setting time is needed, namely retarders. However, chemical admixtures have relatively high prices. Therefore, in this study, sugar was used as an alternative ingredient, because sugar is one of the retarder’s composition and has relatively economical price. The percentages of sugar were varied, which are 0% (as a control specimen); 0.03%; 0.05% and 0.1%. The test results showed that the longest setting time is obtained by mixture with 0.1% of sugar, with the initial setting time 157 minutes and the final setting time 258 minutes, while the maximum compressive strength test results are 225,38 kg/cm2 obtained by a mixture with 0,05% of sugar.Keywords: setting time, sugar, compressive strength, retarder
Pengaruh Silica Fume sebagai Subtitusi Semen terhadap Nilai Resapan dan Kuat Tekan Mortar Bantot Sutriono; Retno Trimurtiningrum; Aditya Rizkiardi
RekaRacana: Jurnal Teknil Sipil Vol 4, No 4: Desember 2018
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/rekaracana.v4i4.12

Abstract

ABSTRAKBeton dan mortar banyak digunakan sebagai bahan konstruksi di seluruh dunia. Meningkatnya permintaan beton dan mortar juga meningkatkan permintaan semen di pasar yang berdampak negatif bagi lingkungan. Industri semen  menghasilkan sekitar 6 hingga 7 persen dari seluruh CO2 di seluruh dunia. Oleh karena itu, para peneliti mencoba mengembangkan gagasan tentangbeton ramah lingkungan, dengan mengurangi penggunaan semen dengan menggunakan bahan alternatif seperti silica fume. Silica fume adalah bahan pozzolan yang kaya akan silika dan dapat bereaksi kimia dengan kalsium hidroksida, membentuk gel kalsium silikat (CSH) pada beton. Tujuan dari penelitian ini adalah untuk menyelidiki pengaruh silica fume sebagai pengganti parsial semen terhadap nilai resapan dan kekuatan tekan mortar. Persentase silica fume bervariasi 0%, 5%, 10%, 12% dan 15%. Hasil pengujian menunjukkan nilai resapan minimum adalah 3,276% diperoleh campuran dengan 15% silica fume dan kuat tekan maksimum 312,574 kg/cm2 diperoleh campuran dengan 8% silica fume.Kata kunci: silica fume, nilai resapan, kuat tekan, mortar ABSTRACTConcrete and mortar are widely used as contruction materials. The increasing demand of concrete and mortar also increase the demand of cement in the market which has negative impact for environment. The cement industry produced for approximately 6 to 7 percent of all CO2 worldwide. Therefore, the researches try to develop the idea of green concrete with reducing the utilize of cement with using the alternative materials such as silica fume. Silica fume is a pozzolanic material that contain rich of silica and has chemical reaction with calcium hydroxide forming calcium silicate hydrate (C-S-H) gel in concrete.The aimed of this research is to investigate the influence of silica fume as partial replacement of cement on absoption and compressive strength of mortar.The percentage of silica fume were varied from 0%, 5%, 10%, 12% and 15%. The test result showed that the minimum absorption value is 3.276% obtain from the mixture with 15% of silica fume and the maximum compressive strength is 312.574 kg/cm2 obtain from the mixture with 8% of silica fume.Keywords: Silica fume, absorption, compressive strength, mortar
STUDI PERBANDINGAN KINERJA GEDUNG BETON BERTULANG SRPMK 6 LANTAI DENGAN MENGGUNAKAN METODE PUSHOVER DAN NONLINEAR TIME HISTORY ANALYSIS Syaiful Anam; Bantot Sutriono; Retno Trimurtiningrum
Jurnal Ilmiah MITSU (Media Informasi Teknik Sipil Universitas Wiraraja) Vol 8 No 1 (2020): Jurnal Ilmiah MITSU
Publisher : Fakultas Teknik, Universitas Wiraraja

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24929/ft.v8i1.922

Abstract

Indonesia is one of the earthquake-prone countries in the world. To reduce the impact of earthquakes, especially the missing life due to building collapse, the behavior or performance of buildings against the earthquakes is one of the most important things to consider. Therefore, inelastic or nonlinear analytical calculations must be performed. Some methods for calculating nonlinear analysis are static nonlinear pushover analysis and inelastic dynamic time history analysis. This study compares the performance results of the pushover analysis and time history analysis using the earthquake records from San Fernando, Morgan Hill and Kobe for a 6-story SRPMK reinforced concrete building. From the results of the pushover analysis and time history analysis, the same level of performance is obtained, which is IO (Immediate Occupancy) category for both X and Y directions. The displacement target obtained from the pushover analysis is 0.092 m for the X direction and 0.096 m for the Y direction. While the maximum displacement obtained from the results of time history analysis is 0.0129 m for the X direction and 0.005 m for the Y direction from the Kobe earthquake and San Fernando earthquake records.
PERANCANGAN DETEKSI LONGSOR DI BUKIT WATU BUCENG DUSUN KETOS DESA WONODADI KULON Ahmad Ridho’i; Sunu Priyawan; Bantot Sutriono
JPM17: Jurnal Pengabdian Masyarakat Vol 1 No 02 (2015)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30996/jpm17.v1i02.535

Abstract

At the current state of nature that terexploitasi resulting in damage them in mountainous areas prone to landslides and flooding, it requires the existence of early warning against the dangers that threaten and cause substantial losses to society. Landslide is sometimes difficult to detect, ground movement can not always be monitored because it requires the development of an early warning system landslides that can provide early warning of distance. Design and manufacture of early warning against the danger of landslides is necessary, for the detection system landslide hazard consisting of a sensor monitoring the movement of land, processor (microcontroller), and modem sabagai sender sms (short message service) to the mobile number designated or interested provide guidance to the people affected in the landslide.Keywords: landslide detection, microcontroller, modem
Pengaruh Penambahan Gula Pasir terhadap Waktu Ikat Awal Pasta Semen dan Mortar Retno Trimurtiningrum; Bantot Sutriono; Billy Arrowrichta; Hiasintus Bertus Watu
KURVATEK Vol 4 No 2 (2019): November 2019
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33579/krvtk.v4i2.1564

Abstract

In concrete construction process, it is often happened that the location of batching plan is different from the project location, so it takes time in its material transport. To prevent the concrete material from early setting time before casting, it is necessary to add chemical admixture to slow the setting time, which is retarder. Generally, chemical admixtures including retarder have relatively expensive price. Therefore, this study used alternative material such as sugar, because sugar is one of retarder’s consituent material that has relatively low price and also easy to obtain. The percentage of sugar in this research were 0% (as a control specimen); 0.03%; 0.05% and 0.1%. The setting time test used the Vicat neddle apparatus for cement paste and penetration resistance tools for mortar. The setting time result shows that sugar can delay the initial setting time on cement paste or mortar specimens. The longest initial setting time was obtained by a mixture that has been added 0,1% of sugar which is 157,69 minutes for cement paste test and 250 minutes for mortar specimen. Keyword : setting time, sugar, cement paste, mortar.
Co-Authors Aditya Rizkiardi Ahmad Ridho’i Billy Arrowrichta Hiasintus Bertus Watu Misrawi Misrawi Retno Trimurtiningrum Sunu Priyawan Syaiful Anam