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INDONESIA
REKA RACANA
Published by Institut Teknologi Nasional Bandung
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Articles 8 Documents
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Search results for , issue "Vol 9, No 2: Juli 2023" : 8 Documents clear
Kajian Perbandingan Kuat Tekan dan Berat Jenis Beton dengan Pasir Mundu dan Pasir Malang Ira Puspitasari
RekaRacana: Jurnal Teknil Sipil Vol 9, No 2: Juli 2023
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/rekaracana.v9i2.60

Abstract

ABSTRAKPasir atau agregat halus adalah material pengisi yang diikat semen dengan air sehingga menjadi massa padat, sehingga kualitasnya sangat berpengaruh langsung terhadap mutu beton. Adanya berbagai jenis pasir di Pasaran Mendasari, seperti Pasir Malang dan Pasir Mundu, menjadikan penelitian ini bertujuan untuk mengetahui pengaruh jenis pasir terhadap kuat tekan dan berat volume beton. Pasir Mundu memiliki tekstur yang keras dan kasar, halmana hasil penambangan di kota Cirebon dan umum digunakan untuk bahan bangunan. Sedangkan Pasir Malang sering digunakan masyarakat sebagai media tanam yg berasal dari magma gunung berapi yang terpecah kealiran sungai. Beton direncanakan menggunakan metode SNI dan memiliki kuat tekan rencana 19 MPa. Hasil uji kuat tekan beton dengan Pasir Malang menghasilkan kuat tekan beton rata-rata sebesar 10,08 MPa dan kuat tekan beton maksimum sebesar 11,50 MPa sedangkan untuk penggunaan Pasir Mundu diperoleh kuat tekan beton rata rata sebesar 12,51 MPa dan kuat tekan beton maksimum sebesar 13,61 MPa. Pengujian berat jenis menunjukkan beton dengan Pasir Mundu memiliki berat volume 2.194,93 kg/m3 halmana nilainya lebih besar dibandingkan dengan Pasir Malang yaitu 1.960,97 kg/m3. Berdasarkan pengujian kuat tekan dan berat volume dapat disimpulkan disimpulkan bahwa beton dengan Pasir Mundu memiliki kuat tekan dan berat jenis yang lebih besar sedangkan beton dengan Pasir Malang memiliki kuat tekan dan berat jenis yang lebih kecil.Kata kunci: pasir Malang, pasir Mundu, berat jenis, kuat tekan ABSTRACTSand or fine aggregate is a filler material that is bound by cement with water so that it becomes a solid mass, which is why the quality of sand has a direct effect on the quality of concrete. The existence of various types of sand on the market, such as Malang and Mundu sand, underlies this research with the aim of wanting to know the effect of the type of fine aggregate/sand on the compressive strength and unit weight of concrete. Mundu sand has a hard and rough texture which is the result of mining in the city of Cirebon and is commonly used for building materials. While Malang sand is often used by the community as a planting medium which comes from volcanic magma that splits into rivers. The concrete in this study was planned using the SNI method and had a design compressive strength of 19 MPa. The results of the concrete compressive strength test with Malang sand produced an average concrete compressive strength of 10.08 MPa and a maximum concrete compressive strength of 11.50 Mpa, while for the use of Mundu sand, an average concrete compressive strength of 12.51 MPa and a maximum concrete compressive strength of 13.61 MPa. The specific gravity test shows that concrete with Mundu sand has a volume weight of 2,194.93 kg/m3 greater than Malang sand which is 1,960.97 kg/m3. Based on the compressive strength and unit weight tests, it can be concluded that concrete with Mundu sand has a greater compressive strength and specific gravity, while concrete with Malang sand has a smaller compressive strength and specific gravity.Keywords: Malang sand, Mundu sand, specific gravity, compressive strength
Project Communication Management in a Micro Small Medium Enterprises (MSMES) in a Construction Project Irvan Wiradinata
RekaRacana: Jurnal Teknil Sipil Vol 9, No 2: Juli 2023
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/rekaracana.v9i2.1

Abstract

ABSTRACTMicro, small, and medium enterprises (MSMEs) have become Indonesia's most essential and strategically important national economic drivers. This research focuses on an MSME involved in a construction project in 2021. This research aims to shed light on the project communication management of an MSME organization, PT Nata Kota Nusantara, simply Natakota, a micro-scale enterprise based in Bogor. Natakota was engaged in a civil construction project in a remote site area at PT GDE (GDE) in Ciwidey, Bandung. GDE is a state-owned enterprise focusing on geothermal energy and power generation. Virtual ethnography, observation, and discourse analysis were performed to reveal the project communication management process within the organization. It was unveiled that Natakota used Google Spreadsheet as a form of free and open-source software (FOSS) as their primary communication tool during the project execution. Actor-Network Theory (ANT) explains that the actor is the prime entity that shapes, drives, and accelerates the communication process within the network. This research observed the communication and collaboration between employees on several Google Spreadsheet files. In a project execution phase, communication is essential to obtain a productive project. Project communication plays a central part in communicating information flow to execute that project successfully. The results of this research show that several features in Google Spreadsheet play as actors in the ANT framework, which shapes, drives, and accelerates the internal communication process in the organization. Additionally, it appears that Google Spreadsheet could offer a competitive low-cost option for MSMEs looking to manage internal communications effectively and efficiently.Keywords: collaboration, communication, MSMEs, organization, project
Studi Eksperimental Pengaruh Variasi Panjang Polypropylene Fibre terhadap Performa Beton Akhmad Ilham Ramadhan Sabara; Muhammad Ryan Rifqi; Vanessa Vanessa; Mohammad Febriant; Dianati Fadiah
RekaRacana: Jurnal Teknil Sipil Vol 9, No 2: Juli 2023
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/rekaracana.v9i2.38

Abstract

ABSTRAKSalah satu inovasi untuk meningkatkan performa beton adalah penambahan serat, seperti serat polypropylene. Penelitian ini bertujuan untuk mempelajari pengaruh variasi panjang serat polypropylene terhadap kinerja beton. Hasil penelitian menunjukkan bahwa workability beton mengalami pengurangan akibat serat yang mengalami kekusutan terutama pada serat makro. Selain itu diamati juga terjadi peningkatan kuat tekan beton diakibatkan terjadinya peningkatan mechanical bonding. Kuat tarik belah dan lentur murni beton tidak mengalami perubahan signifikan dengan penambahan serat. Namun, Penambahan serat terbukti dapat membantu mengurangi pelebaran retak secara efektif. Penambahan serat pada campuran beton meningkatkan mekanisme keruntuhan beton dengan menyediakan daktilitas yang lebih baik terutama pada serat mikro. Penelitian ini diharapkan dapat memberikan solusi efektif dan ekonomis untuk meningkatkan kinerja beton dengan penambahan serat polypropylene.Kata kunci: beton serat, serat Polypropylene, slump, kuat tekan, kuat tarik belah, kuat lentur murni, daktilitas betonABSTRACTAn innovative way to improve concrete performance could be the addition of fibers, such as polypropylene fibers. This research aims to study the effect of polypropylene fiber length variation on concrete performance. The results showed that the workability of concrete was reduced due to fiber tangling, especially in macro fibers. In addition, it was also observed that there was an increase in the compressive strength of concrete due to an increase in mechanical bonding. The split tensile and flexural strength of concrete did not change significantly with the addition of fibers. However, fiber addition was found to help reduce crack widening effectively. The addition of fibers to the concrete mix improves the collapse mechanism of concrete by providing better ductility especially in the case of micro fibers. This research is expected to provide an effective and economical solution to improve the performance of concrete with the addition of polypropylene fibers.Keywords: fiber concrete, Polypropylene fibre, slump, compressive strength, split tensile strength, pure flexural strength, concrete ductility
Pembelajaran Berbasis Masalah: Penerapan Teknologi Rumah Instan Sederhana Sehat (RISHA) di Indonesia Zefanya Handika Mulyawan; Mia Wimala; Carissa Carissa
RekaRacana: Jurnal Teknil Sipil Vol 9, No 2: Juli 2023
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/rekaracana.v9i2.13

Abstract

ABSTRAKGuna mengatasi permasalahan backlog hunian di Indonesia, salah satu alternatif yang ditawarkan oleh Kementerian Pekerjaan Umum dan Perumahan Rakyat (PUPR) adalah teknologi modular beton pracetak Rumah Instan Sederhana Sehat (RISHA). Beberapa keunggulan yang ditawarkan meliputi peningkatan efisiensi waktu, peningkatan keamanan konstruksi, pengurangan sampah konstruksi, kebutuhan pekerja yang minimum, desain yang sederhana, dan ramah lingkungan. Sampai saat ini, teknologi ini lebih banyak diterapkan untuk konstruksi rumah darurat bencana dan bukan untuk hunian swadaya. Untuk memenuhi tuntutan kebutuhan hunian yang semakin menantang di masa mendatang, pembelajaran melalui permasalahan-permasalahan yang dihadapi di lapangan perlu dikaji dan dievaluasi lebih lanjut. Penelitian awal ini bertujuan untuk mengidentifikasi permasalahan yang timbul selama penerapan teknologi RISHA baik pada tahap perencanaan, produksi, konstruksi, maupun pemeliharaan. Kajian literatur, bimbingan teknis, dan wawancara dilakukan terhadap beberapa aplikator yang tersebar di seluruh Indonesia dilakukan untuk menjawab tujuan tersebut. Hasil penelitian menunjukkan berbagai permasalahan yang dapat diklasifikasikan ke dalam empat aspek, yaitu sistem manajerial dan prosedural, arsitektural dan struktural, finansial dan ekonomi, serta sosial dan stakeholders. Setelah itu, beberapa strategi yang dapat bermanfaat bagi upaya pengembangan teknologi RISHA juga dihasilkan berdasarkan analisis SWOT.Kata kunci: RISHA, beton pracetak, teknologi modular, permasalahan penerapan RISHA ABSTRACTTo overcome the housing backlog problem in Indonesia, The Ministry of Public Works, and Public Housing (PUPR) has offered a precast concrete modular technology, Rumah Instan Sederhana Sehat (RISHA). Its advantages include increased time efficiency, enhanced construction safety, reduced wastage, minimal labor requirements, simple design, and eco-friendly. Until now, RISHA is mostly used for disaster emergency housing, and not for self-support houses. To meet the housing demands that will be increasingly challenging in the future, learning through the problems encountered in its application needs to be studied and evaluated further. This initial research aims to identify problems that arise during the application of RISHA technology at various stages, i.e., planning, production, construction, and maintenance. A literature review, technical guidance, and interviews with several applicators spread throughout Indonesia were conducted to answer the objective. The results indicate various problems that can be classified into four aspects, namely managerial system and procedural; architectural, and structural; financial, and economic; and social and stakeholders. Furthermore, several strategies that can be useful for RISHA development efforts are also generated based on a SWOT analysis.Keywords: RISHA, precast concrete, modular technology, RISHA’s implementation issues
Pengaruh Subtitusi Parsial Variasi Tepung Kaca Terhadap Kuat Tekan Beton Geopolimer Sirait Kristin Angelika; Erma Desimaliana; Mirara Khanza
RekaRacana: Jurnal Teknil Sipil Vol 9, No 2: Juli 2023
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/rekaracana.v9i2.70

Abstract

ABSTRAKSalah satu masalah utama yang dihadapi adalah tingginya emisi karbon dioksida (CO2) yang dihasilkan semen selama proses pembangunan dan penggunaan gedung. Penelitian ini dilakukan dengan membuat perbandingan agregat dan binder-nya sebesar 70%:30%, sebagai pengganti material pengikat yang digunakan yaitu fly ash dan tepung kaca, yang direaksikan dengan alkali aktivator untuk menghasilkan binder pada beton geopolimer. Alkali aktivator yang digunakan yaitu larutan NaOH konsentrasi 10M dan Na2SiO3 dengan perbandingan 1:3. Pada penelitian ini dilakukan 4 variasi benda uji berbentuk silinder ukuran 10 cm x 20 cm sebanyak 48 buah dengan perbandingan tepung kaca dan fly ash yaitu 0%:100% (variasi A), 10%:90% (variasi B), 15%:85% (variasi C), dan 25%:75% (variasi D). Metode membran diaplikasikan untuk perawatan benda uji, selanjutnya dilakukan pengujian kuat tekan beton pada umur 7, 14, dan 28 hari. Berdasarkan hasil pengujian kuat tekan beton geopolimer tertinggi yaitu pada variasi B halmana 10% tepung kaca dengan 90% fly ash, dengan nilai masing-masing sebesar 21,12 MPa; 26,80 MPa; dan 28,65 MPa pada pengujian umur beton geopolimer 7 hari, 14 hari, dan 28 hari.Kata kunci: beton geopolimer, tepung kaca, fly ash, alkali kktivator, kuat tekan beton ABSTRACTOne of the main problems faced is the high emission of carbon dioxide (CO2) produced by cement during the process of building and using the building. This research was conducted by making a ratio of aggregate and binder of 70%:30%, as a substitute for the binding material used, namely fly ash and glass powder, which were reacted with an alkaline activator to produce binder in geopolymer concrete. The alkaline activator used was a 10M concentration of NaOH and Na2SiO3 with a ratio of 1:3. In this study, 4 variations of cylindrical specimens measuring 10 cm x 20 cm were carried out with 48 pieces with a ratio of glass powder and fly ash, namely 0%:100% (variation A), 10%:90% (variation B), 15%: 85% (variation C), and 25%:75% (variation D). The membrane method was applied for the treatment of the specimens, then the compressive strength of the concrete was tested at the age of 7, 14 and 28 days. Based on the results of the geopolymer concrete compressive strength test, the highest was variation B, which was 10% glass flour and 90% fly ash, with each value of 21.12 MPa; 26.80 MPa; and 28.65 MPa on the geopolymer concrete age test of 7 days, 14 days and 28 days.Keywords: geopolymer concrete, Glass powder, fly ash, alkaline activator, concrete compressive strength 
Pengaruh Spasi antar Helix terhadap Daya Dukung Fondasi Helical Pile pada Tanah Limestone dengan Metode Hoek Brown dan Mohr Coloumb Yuki Achmad Yakin; Desti Santi Pratiwi; Yanuar Agis Sugiarto
RekaRacana: Jurnal Teknil Sipil Vol 9, No 2: Juli 2023
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/rekaracana.v9i2.26

Abstract

ABSTRAKRencana pembangunan pembangkit listrik tenaga surya di bali. Karena pembangunan berada di lokasi bukit tinggi dekat laut yang dimana memiliki hembusan angin yang cukup kuat sehingga memengaruhi kuat aksial tekan dan aksial tarik. Oleh karena itu alternatif untuk menahan beban tekan dan tarik yaitu menggunakan fondasi Helical pile dimana lokasi penempatanya di bebatuan tanah Limestone. Dalam pemodelan fondasi helical pile divariasikan spasi helix nya yaitu 0,1 m; 0,15; m 0,2 m; dan 0,3 m. Hasil Deformasi dipemodelan plaxis 3D ada yaitu daya dukung ultimate dengan perbandingan model tanah Hoek Brown dan Mohr Coloumb dimana nilai daya dukung nya berbeda karena parameter dan spasi helix mempengaruhi nilai daya dukung. Untuk perhitungan analitis daya dukung menggunakan 2 metode yaitu Individual Bearing dan Cylindrical Shear. Tahapan perhitungan 2 metode memiliki nilai daya dukung yang berbeda berdasarkan nilai variasi spasi antar helix.Kata kunci: helical pile, Plaxis 3D, Hoek Brown, Mohr Coloumb ABSTRACTPlans to build a solar power plant in Bali. Because the development is located on a high hill near the sea which has strong enough wind gusts that affect axial compressive and axial tensile strength. Therefore an alternative to withstand compressive and tensile loads is to use a Helical pile foundation where the location is placed in Limestone soil rocks. In modeling the helical pile foundation, the helix spacing varies, namely 0.1 m 0.15 m 0.2 m and 0.3 m. The results of deformation in 3D plaxis modeling are the ultimate bearing capacity with a comparison of the Hoek Brown and Mohr Coloumb soil models where the bearing capacity values are different because the parameters and helix spacing affect the bearing capacity values. For the analytical calculation of the carrying capacity using 2 methods, namely Individual Bearing and Cylindrical Shear. The calculation stages of the 2 methods have different carrying capacity values based on the variation in the spacing between helix.Keywords: helical pile, Plaxis 3D, Hoek Brown, Mohr Coloumb
Model Penurunan Umur Layan terhadap Perubahan Nilai Parameter Desain Perkerasan Lentur dan Perkerasan Kaku Runway Bandar Udara Barkah Wahyu Widianto; Raden Christophorus Audiwahyu; Erlangga Maulana Basuki
RekaRacana: Jurnal Teknil Sipil Vol 9, No 2: Juli 2023
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/rekaracana.v9i2.80

Abstract

ABSTRAKDalam desain jenis perkerasan di fasilitas Runway Bandar Udara dibedakan menjadi kaku dan lentur, memiliki karakteristik sistem distribusi tegangan sampai subgrade yang berbeda, terutama pada perubahan nilai parameter desain. Hal ini akan mempengaruhi penurunan umur layan. Penelitian ini bertujuan untuk memodelkan hubungan penurunan umur layan terhadap perubahan nilai parameter desain yaitu peningkatan annual departure lalu lintas pesawat udara, penurunan nilai CBR subgarde, serta penurunan kondisi modulus PCC pada perkerasan kaku dan setiap layer pada perkerasan lentur. Metode yang digunakan adalah Layered Elastic Theory bersumber pada FAA AC 150/5320-6G dengan software FAARFIELD V 2.0.18. Pada perkerasan lentur, penurunan CBR Subgrade memiliki nilai perubahan umur layan yang paling besar di antara penurunan modulus dan kenaikan annual departure yaitu y = 19,395 e-0,092x. Sedangkan pada perkerasan kaku, penurunan modulus memiliki nilai perubahan umur layan yang paling besar di antara penurunan CBR subgrade dan kenaikan annual departure yaitu y = 21,445 e-0,132x. Berdasarkan perbandingan model umur layan tersebut, maka perubahan paramater CBR subgrade paling berpengaruh pada perkerasan lentur, sedangkan perubahan parameter modulus PCC pada perkerasan kaku.Kata kunci: umur layan, CBR subgrade, annual departure, mutu material ABSTRACTIn the design of the type of pavement at the airport runway facility, it is distinguished into rigid and flexible, having different characteristics of the stress distribution system to subgrade, especially in changes in design parameter values. This will affect the decrease in service life. This study aims to model the relationship between reduced service life and changes in design parameter values, such as increase in annual departure of aircraft traffic, a decrease in the CBR subgarde value, and a decrease in PCC modulus conditions on rigid pavements and each layer on flexible pavements. The method used is Layered Elastic Theory based on FAA AC 150/5320-6G with FAARFIELD V 2.0.18 software. On flexible pavement, the decrease in CBR Subgrade has the largest change in service life between the decrease in modulus and the increase in annual departure, namely y = 19.395 e-0.092x. Whereas on rigid pavements, the decrease in modulus has the greatest change in service life between the reduction in CBR subgrade and an increase in annual departure, namely y = 21.445 e-0.132x. Based on the comparison of the service life models, the changes in CBR subgrade parameters have the most effect on flexible pavements, while changes in the PCC modulus parameters on rigid pavements.Keywords: Numerical Integration, Dredging Volume
Estimasi Volume Pengerukan Pelabuhan Tanjung Laut Dengan Metode Integrasi Numerik Fitri Suciaty; Muhamad Heaqal Ifriyanto; Siti Rania Usemahu
RekaRacana: Jurnal Teknil Sipil Vol 9, No 2: Juli 2023
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/rekaracana.v9i2.49

Abstract

ABSTRAKPerhitungan volume pengerukan pada suatu pelabuhan diketahui dapat dilakukan dengan berbagai metode. Pada penelitian ini, algoritma perhitungan integrasi numerik klasik diaplikasikan untuk mengestimasi volume pengerukan Pelabuhan Tanjung Laut. Perhitungan dilakukan dengan menggunakan berbagai metode dasar pada integrasi numerik, yaitu dengan tiga pendekatan yang berbeda: aturan titik tengah (midpoint rule), aturan trapesium (trapezoidal rule), dan aturan simpson (Simpson’s rule). Data yang digunakan pada penelitian ini adalah data batimetri Pelabuhan Tanjung Laut hasil survey yang dilakukan oleh PT Marindo Utama Penata Kawasan pada tahun 2016. Hasil perhitungan dengan menggunakan pendekatan integrasi numerik dibandingkan dengan data volume pengerukan yang didapatkan dari PT Marindo Utama Penata Kawasan. Estimasi volume pengerukan dengan pendekatan integrasi numerik tersebut menghasilkan nilai galat dan kecepatan konvergensi yang bervariasi. Analisis perbandingan ketiga pendekatan yang berbeda dalam menghitung volume pengerukan dilakukan pada penelitian ini untuk mengetahui metode mana yang paling akurat.Kata kunci: Integrasi Numerik, Volume Pengerukan ABSTRACTThe volume of dredging at a port can be calculated using various methods. In this study, the classic numerical algorithm of integration was applied to estimate the dredging volume of Tanjung Laut Port. Calculations are performed using basic methods of numerical integration, differing in a way of approximation: the midpoint rule, the trapezoidal rule, and Simpson's rule. The data used in this research is the bathymetric survey data of Tanjung Laut Port from PT Marindo Utama Penata Kawasan in 2016. The calculation results using the approximation methods of numerical integration are compared with the dredging volume data obtained from PT Marindo Utama Penata Kawasan. The approximated value of the dredging volume obtained, but they are determined with various errors and speed of convergence to the correct result. A comparative analysis of three different approaches to estimating dredging volume was carried out in this study to find out which method is the most accurate. Keywords: Numerical Integration, Dredging Volume

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