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Info-Teknik
Published by Universitas Lambung Mangkurat
ISSN : 08532508     EISSN : 24599964     DOI : http://dx.doi.org/10.20527
Core Subject : Engineering,
Engineering
Jurnal Info – Teknik menerbitkan artikel – artikel karya orisinil dan signifikan pada Bidang Rekayasa Teknik.
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 425 Documents
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UJI LENTUR KOMPOSIT POLYESTER - SERAT PURUN TIKUS ( ELEOCHARIS DULCIS ) Akhmad Syarief
INFO-TEKNIK Vol 12, No 2 (2011): INFOTEKNIK VOL. 12 NO. 2 2011
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/infotek.v12i2.1801

Abstract

Material komposit khususnya komposit berbahan polimer saat ini menjadi material alternatif pengganti material logam dan sangat banyak diaplikasikan dalam dunia industri karena sifatnya yang tahan korosi dan massa jenis yang kecil dengan kekuatan yang dapat dijadikan sebagai bahan alternatif selain material logam. Dalam perkembangan penelitiannya serat alam (natural fibre) mulai dimanfaatkan untuk penguat pada komposit sebagai pengganti fiber sintetis seperti glass fiber. Hal ini dilakukan mengingat sifatnya yang ramah lingkungan dan banyak tersedia di alam, serta pemanfaatannya yang selama ini masih belum dioptimalkan. Masalah utama yang dihadapi dalam penggunaan serat alam sebagai penguat komposit polimer adalah sifatnya yang hydrophilic atau cenderung menyerap air, sedangkan polimer bersifat hydrophobic atau cenderung menolak air. Sehingga ikatan antara serat alam dan matrik polimer menjadi lemah, dan berdampak pada kekuatan yang lemah, hal ini yang menjadi alasan perlunya perlakuan pada serat sehingga memperbaiki ikatan antara serat dan matrik. Perlakuan khusus yang dapat dilakukan adalah perlakuan fisik, maupun kimia. Dalam penelitian ini dilakukan pembuatan komposit Polimer (Unsaturated Polyester) dengan menggunakan serat alam yaitu serat Purun Tikus (Eleocharis Dulcis). Tujuannya adalah melihat pengaruh waktu perlakuanKmnO4 sebesar 2% pada serat terhadap sifat mekanik komposit yang dihasilkan. Dimana variasi waktu yang digunakan adalah 5,10,15,30, 45 dan 60 menit. Kemudian dianyam dengan bentuk anyaman plain, satin dan mock leno sebanyak 3 layer. Selanjutnya dibuat spesimen uji lentur untuk mengetahui sifat mekaniknya. Hasil pengujian lentur menunjukkan bahwa lama waktu proses perlakuan KmnO4 mempengaruhi sifat mekanik komposit. Kekuatan lentur maksimum pada perlakuan KmnO4 selama 15 menit, yaitu kekuatan lentur sebesar 69,13 Mpa (plain) dan Modulus Elastisitas sebesar 45,17 Mpa (plain).
Kinerja Tukang dan Laden Pada Proyek Pembangunan Gedung Dewi Fameilia; Rini Ratnayanti; Bernardinus Herbudiman
INFO-TEKNIK Vol 5, No 1 (2004): INFOTEKNIK VOL. 5 NO. 1 2004
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/infotek.v5i1.649

Abstract

On the same quality standard, performance of contractors can be observed in the time and cost parameters. These parameters are directly influenced by the productivity of workers. Productivity is generally a ratio of work result to the available resources. Observation was conducted to the productivity of foremen, workers, and laborers who were all the frontline construction executors. The work scope was limited to reinforced concrete, which is typically used for building construction. Malls type was chosen due to wide development of this type as economical centre in Bandung.Case study was conducted to the mall inside the City Square complex, in Abdurrachman Saleh street, Bandung. Data gathering was done by using the record of weekly work development report signed by project manager contractor and supervisor consultant. Observation was directly done to a number of workers per work sub-item per day. Productivity analysis was conducted according to the data and observation results.Productivity is influenced by supervision, coordination, internal, and inter-group factors. This research resulted the productivity coefficient value of foreman, workers, and laborers, which later will be used as a cost calculation reference of malls project.
ANALISIS BUNDARAN PADA SIMPANG EMPAT JALAN A. YANI KM 36 DI BANJARBARU Rosehan Anwar
INFO-TEKNIK Vol 13, No 1 (2012): INFOTEKNIK VOL. 13 NO. 1 2012
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/infotek.v13i1.1817

Abstract

Kota Banjarbaru merupakan kota penghubung antara kota Banjarmasin dengan kota lainnya di Kalimantan selatan. Bundaran pada simpang empat Jalan A. Yani ini merupakan salah  satu  bundaran  penting  di  Banjarbaru. Bundaran  ini  melayani berbagai arus yang berasal dari arah Banjarmasin, Martapura, Jalan Mistarcokrokusumo dan Jalan Ir. P.M. Noor. Penelitian  ini  dimaksudkan  untuk  mengetahui  kinerja  bundaran  saat  ini, kinerja bundaran ketika ukuran lebar jalinan di perkecil, dan kinerja bundaran ketika ukuran lebar jalinan di perbesar. Penelitian yang dilakukan pada bundaran ini yaitu dengan pengumpulan data primer dan sekunder. Dalam melakukan analisa, perhitungan berdasarkan metode dari Manual Kapasitas Jalan Indonesia 1997. Dari hasil analisa menunjukan bahwa volume terbesar terdapat pada sore hari yaitu jam 16.45-17.45 wita sebesar 1953,6 smp/jam dan terdapat pada jalinan antara Jl. P.M. Noor dengan Jl. Mistarcokrokusumo. Untuk derajat kejenuhan pada kondisi eksisting dan ukuran lebar jalinan di perkecil sebesar 0,24. Sedangkan kondisi ukuran lebar  jalinan  di  perbesar  yaitu  sebesar  0,22.  Untuk  nilai  tundaan  pada  kondisi eksisting sebesar 6,355 det/smp, pada kondisi ukuran lebar jalinan di perkecil yaitu sebesar 6,403 det/smp dan pada kondisi ukuran lebar jalinan di perbesar yaitu sebesar 6,245 det/smp. Berdasarkan MKJI 1997 nilai DS < 0,85 dan nilai D < 10 det, maka bundaran ini masih normal atau tidak jenuh kepadatan arusnya.
PENGGUNAAN VARIASI TRAY PADA PENGOLAHAN AIR SUMUR BOR Budi Nining Widarti
INFO-TEKNIK Vol 17, No 1 (2016): INFOTEKNIK Vol. 17 No. 1 2016
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/infotek.v17i1.1258

Abstract

Drilled water well or groundwater is one of clean water sources which often contains high concentration of iron (Fe) and manganese (Mn) with low concentration of pH. The concentration of Fe, Mn and pH in the water that does not comply with quality standards may adversely affect the health of humans. The purpose of this study was to determine the optimum removal efficiency value for Fe, Mn and optimum value of difference in increasing for pH from the point of multiple tray aerator inlet-sedimentation outlet, overall treatment, and determine the quality of water sample at the end of outlet for each parameter in all variations of tray. On this research the variations were performed on multiple tray aerator was the first, second, third, fourth, fifth tray variation including the number of tray storey at 1, 2, 4, 6 and 8 tray.Based on the research that had been done at the point of multiple tray aerator inlet-sedimentation outlet, the optimum removal efficiency value for Fe occurred at the second tray variation of 61,93 %, Mn at the fourth tray variation of 35,69 %. The optimum value of difference in increasing for pH occurred at the fifth tray variation of 1,6. At the point of overall treatment, the optimum removal efficiency value for Fe occurred at the fourth tray variation of 100,00 %, Mn at the second tray variation of 99,68 %. The optimum value of difference in increasing for pH occurred at the fifth tray variation of 2,6.  
PENGARUH PERUBAHAN AREAL KEDAP AIR TERHADAP AIR PERMUKAAN Achmad Rusdiansyah
INFO-TEKNIK Vol 5, No 2 (2004): INFOTEKNIK VOL. 5 NO. 2 2004
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/infotek.v5i2.1666

Abstract

Genangan air sering kita lihat dan rasakan disetiap ruas jalan di perkotaan dan dimana saja. Keadaan ini merupakan langganan tiap tahun terutama pada musim penghujan. Telah banyak pendapat yang disampaikan oleh masyarakat alasan-alasan penyebab genangan air tersebut, salah satunya adalah disebabkan berkurangnya lahan resapan akibat pembangunan perumahan, dll, sehingga volume air hujan yang jatuh dan menjadi air permukaan semakin bertambah besar. Anggapan ini akan dicoba dan dibuktikan dengan analisa rekayasa hidrologi.Hubungan perubahan volume air permukaan dengan perubahan lahan resapan  dianalisa di laboratorium dengan alat Rainfall Hydrografhs. Parameter hidrologi yang diambil dalam percobaan adalah tinggi curah hujan yang diasumsikan konstan. Parameter hidrologi lain yang ditetapkan yaitu areal/lahan kedap air yang berubah bertahap mulai kondisi awal 0,0 % , 25 %. 50%, 75 % dan sampai 100 % kedap air terhadap luas area hujan effektif.Dari percobaan-percobaan hidrograp tersebut diatas, dapat diketahui bahwa terdapat kenaikan volume air akibat pertambahan kenaikan luasan areal kedap air. Pertambahan lahan kedap air seluas 25 %  telah menaikan volume air permukaan sebesar 13,1 satuan, pertambahan lahan kedap air 50% telah menaikan volume air permukaan sebesar 14,6 satuan, pertambahan lahan kedap air 75% telah menaikan volume permukaan sebesar 19,8 satuan dan pertambahan lahan kedap 100%  menaikan volume air permukaan sebesar 18,1 satuan.Hasil analisa diatas maka pertambahan 25% areal kedap air telah menambah volume air permukaan sebesar 15,99% , penambahan lahan kedap air 50 % menambah volume air permukaan sebesar 17,82 %, penambahan lahan kedap air 75 % volume air permukaan bertambah 24,17 % dan kedap air 100 % volume air permukaan bertambah 22,10 %., dengan demikian menghasilkan suatu formula berupa garis lurus  Y = 0,0249 X + 0,1379 dimana Y adalah prosentase pertambahan volume air dan X adalah prosentase pertambahan areal kedap air. Kedua nilai tersebut dinyatakan dalam bentuk perbandingan yaitu 1 : 3.     
PENYANDIAN FILE GAMBAR DENGAN METODE SUBSTITUSI DAN TRANSPOSISI SERTA IMPLEMENTASINYA MENGGUNAKAN BAHASA PEMROGRAMAN BORLAND DELPHI 7.0 Dwi Retnosari
INFO-TEKNIK Vol 14, No 2 (2013): INFOTEKNIK VOL. 14 NO. 2 2013
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/infotek.v14i2.281

Abstract

The study of how a message if safe so we can’t be read by unauthorized parties is cryptography. A message or information which is one important thing in communicating that needs to be kept confidential. For that need to be made an application that is able to secure information in general and particular image file. Cryptography has two of the encryption and decryption algorithms that allow massages can only be cre and read be the right. Method of the substitution and transposition is a conventional encryption techniques that can be used to source the information image file. In applications Borland Delphi programming language used to implement algorithms for encryption and decryption of substitution and transposition, resulting in the form of image files that cant not be read other without the decryption process first.
KAJIAN PROSPEK BATU PERMATA BANJARBARU DALAM PERSPEKSTIF GEOLOGI BAHAN GALIAN Adip Mustofa
INFO-TEKNIK Vol 6, No 2 (2005): INFOTEKNIK VOL. 6 NO. 2 2005
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/infotek.v6i2.1677

Abstract

Banjarbaru has a very complex and interesting geologic condition.  The stratigraphy in this area has a unique and complex characteristic, with Pre-Tertiary until Quarterly in age.  The oldest type of rock found has a Yura-age, consists of: Ultra-mafic rock (Mub) and Metamorphic rock (Mm). Both of these rock-types outspread unconformity under a Pre-Tertiary lithological units (Kapur), likes Keramaian Formation (Kak), sedimentary of volcaniclastic Pitanak Formation (Kvpi). These Pre-Tertiary rocks laid unconformity under a group of Tertiary and Quarterly age of lithology, consists of: Tanjung Formation (Tet), Berai Formation (Tomb), Dahor Formation (TQd) and alluvium sedimentation (Qa).Gemstone deposit, included in its type and occurrences, conducted by long geological processes.  As known, the Regional Geology of Kalimantan, especially inSouth Kalimantanregion, has proceeded in age of Pre-tertiary until Quarter.  This process supported the forming of gemstones and its accumulation.  Kinds of gemstones and semi-gemstones probably accumulated by this geology process which consists of: primary diamond, tourmaline, blue-sapphire, Jade, Garnet, Secondary diamond, Quartz, Zircon, Spinel, opal, etc. Nowadays, the real potency of gemstone and semi-gemstone has not been known yet, so an effort of follow-up exploration is needed.
PEMBUATAN BIOETANOL DARI LIMBAH SERAT KELAPA SAWIT MELALUI PROSES PRETREATMENT, HIDROLISIS ASAM DAN FERMENTASI MENGGUNAKAN RAGI TAPE Lailan Ni&#039;mah; Angga Ardiyanto; Muhammad Zainuddin
INFO-TEKNIK Vol 16, No 2 (2015): INFOTEKNIK VOL. 16 NO. 2 2015
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/infotek.v16i2.206

Abstract

Palm fiber cake is a waste of the palm oil industry or crude palm oil (CPO). Oil palm fiber waste can be used as raw material for second-generation bioethanol because it contains 57.9% cellulose dan18% lignin, and the hydrolysis containing 14.94% hemicellulose. This study was used the process of pretreatment, hydrolysis, neutralization, and fermentation with the purpose to obtain bioethanol. Oil palm fiber was cut to the size of 0.5-1 cm. Then pretreated using acid solvent by heating at 100 ° C for 1 hour with a hot plate stirrer. Solids pretreatment results are mixed with distilled water to concentrations (5% w/v) is prepared to hydrolysis. The solids are then dissolved with a solution of H2SO4 (2% v/v) to 500 ml and dihidrolisisis for 120 minutes with a temperature variation of 115 °C, 120 °C, 125 °C objective to determine the influence of optimal temperature in the process of hydrolysis using an autoclave. Hydrolyzate is neutralized with 1 N NaOH until pH 5 and the sugar content by the Luff-Schoorl method obtained the highest sugar content of 9.69% v/v. Hydrolyzate that has been in the neutralization fermented with yeast and nutrients NPK tape with glass bottles that have been sterilized using an autoclave fermented for 3 days. Fermented ethanol levels were tested by analysis by Gas Chromatography (GC) is known to the highest bioethanol content of 2.858% (v/v). Peak Characteristic of oil palm fiber cellulose before and after pretreatment of cellulose fiber cake increased by 42.30% (cellulose I) to 48.60% (cellulose II) by X-Ray Difraction. Keywords: Palm fiber cake, acid pretreatment, acid hydrolisis, fermentation, bioethanol.
Perbandingan Antara Metode NCSA Dan Metode Analisa Komponen Bina Marga Dalam Menentukan Tebal Perkerasan Yuslan Irianie
INFO-TEKNIK Vol 8, No 1 (2007): INFOTEKNIK VOL. 8 NO. 1 2007
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/infotek.v8i1.1718

Abstract

There are some method to design flexible pavement, two of them are Bina Marga Component Analysis and NCSA method. Both of these methods really have difference. Thus, writer was interested to have a research. The aim of this research is compare both of them on the depth of pavement design.On this paper both of this method used to design Trisakti–Liang Anggang trip by A. Yani higway.On this study, NCSA method resulted  D1 = 5 cm, D2 = 10 cm, D3 = 17,5 cm and Bina Marga Component Analysis method resulted  D1 =  5 cm, D2 = 10 cm,  D3 = 27 cm.
RENCANA ANGGARAN BIAYA UNTUK SUMUR RESAPAN MASJID BESAR KOTA BANJARBARU Aulia Isramaulana
INFO-TEKNIK Vol 15, No 2 (2014): INFOTEKNIK VOL. 15 NO. 2 2014
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/infotek.v15i2.226

Abstract

Banjarbaru is one of the cities in South Borneo, which has developed very rapidly in line with the growth of population and the physical building. This has implications for the decreasing availability of water catchment areas. Therefore it is necessary to built recharge wells to avoid a puddle of water on the surface. This study aimed to quantify the discharge of rain and water for ablution, plan dimensions and the number of recharge wells and budget plans for a large mosque in Banjarbaru.The infiltration wells design using Sunjoto formula. To determine the coefficient of permeability of the soil, tested in the field by using a double ring infiltrometer and testing in the laboratory by using Constant Head Test. This Tests on three major mosques in Banjarbaru , the first is Al-Munawaroh Mosque, Jami Hidayatul Muhajirin Mosque, and Al-Baythar Mosque.The result is Al-Munawaroh Mosque designed infiltration wells depth of 5 m at a cost of one unit of infiltration wells Rp. 4,842,900.00, whereas for Hidayatul Muhajirin Mosque Al-Baythar Mosque designed depth of 3 m at a cost of one unit of infiltration wells Rp. 3,406,700.00. Keywords: infiltration wells, budget plan, Banjarbaru Mosque

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