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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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STUDI KELAYAKAN PEMBANGUNAN INSTALASI PENGOLAHAN AIR TIPE REVERSE OSMOSIS UNTUK SUMBER AIR PERMUKAAN DI KOTA BALIKPAPAN Widya Mulya
INFO-TEKNIK Vol 22, No 2 (2021): INFOTEKNIK VOL. 22 NO. 2 DESEMBER 2021
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/infotek.v22i2.12078

Abstract

Water sources that can be utulized in large quantities by water treatment plants come from surface water, namely rivers. Water is a basic need for life, the increase in population is followed by the rate of use, the burden of populations is also increasing rapidly. Based on data from PDAM Balikpapan in December 2017, the river currently used with a turbidity parameter of 6 – 24 NTU. Water treatment plants is a production unit to change the properties of water so that it is suitable for consumption. The design of water resources includes various choices among alternatives that that are physically feasible, in general each choice of several alternatives must be based on economic considerations, each alternative that receives serious attention must be stated in units of money before the choice is determined or economically feasible. The purpose of this research is to determine the payback periode and to analyze whether development is feasible from economic (financial) perspective or not. Based on the economic feasibility analysis, the payback periode for the type of reverse osmosis treatment for surface water sources with a capacity of 30 L/s is 16 years an 1 month with selling price or Rp.9.118/m3, to get a payback periode of reverse osmosis type treatment for surface water sources with a capacity of 30 L/s less than 10 years, the selling price of drinking water is Rp.16.000/m3 with a payback periode of 9 years and 3 months.
PENGARUH LEBAR PONDASI TERHADAP KEDALAMAN MUKA AIR TANAH DI BAWAH DASAR PONDASI DALAM MENENTUKAN BESARNYA DAYA DUKUNG ULTIMIT DAN DAYA DUKUNG AMAN PONDASI MENERUS PADA TANAH LUNAK DENGAN METODE TERZAGHI PADA KONDISI KERUNTUHAN GESER LOKAL Fitria Handayani
INFO-TEKNIK Vol 22, No 2 (2021): INFOTEKNIK VOL. 22 NO. 2 DESEMBER 2021
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/infotek.v22i2.12386

Abstract

The foundation is the lowest part of the building that continues the load force into the soil or rocks in the soil. Longitudinal foundations are foundations that support elongated walls and rows of closely spaced columns so that if you use a footed foundation, the sides coincide. The design of the foundation must meet the requirements of the safety factor with a value of more than equal to three and the settlement of the foundation is within the tolerance limit. Long-term stability of the foundation must pay attention to the location of the base of the foundation in order to reduce the risk of swelling and shrinkage of the soil, erosion of the foundation surface, scouring on the foundation walls and other soil disturbances. The method used in this study is the terzaghi method because the soil layer is homogeneous and the internal friction angle is < 29o. The ultimate bearing capacity of Terzaghi is used to calculate the bearing capacity of granular soils and soils that have internal friction angle values (Ø) and cohesion (c). The depth of the groundwater table from the base of the foundation greatly affects the ultimate bearing capacity and the safe bearing capacity of the foundation. The further away the groundwater table is from the base of the foundation, the greater the value of the ultimate bearing capacity of the foundation (qu) causing the higher value of the foundation's safe bearing capacity (qs). This study analyzes local shear failure with the highest ultimate bearing capacity of 173.36 t/m2 and the largest safe bearing capacity of 59.56 t/m2 occurs when the depth of the groundwater table is greater than the width of the foundation, while the lowest ultimate bearing capacity is 170.72 t/m2. m2 and the lowest safe bearing capacity of 58.68 t/m2 occurs when the water level is at the base of the foundation.
ANALISA WAKTU KERUSAKAN BALOK BETON BERTULANG AKIBAT KOROSI PADA BANGUNAN STRUKTUR DI DAERAH PANTAI Arie Febry Fardheny
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.v6i2.1681

Abstract

Chloride Penetration on Concrete Structure can create corrosion on steel on reinforcement concrete. As we know today many people design concrete structure near the sea with the same like ordinary in high land. ACI and SNI actually have determined a concrete cover for concrete structure near the sea. This research aim to analyze chloride penetration according to concrete cover. Different concrete cover 20 mm, 40 mm, 60 mm and 70 mm are used in this research. Using finite element method show concrete cover is important thing to depend over corrosion and for life time of structure. These results also show ACI and SNI codes are right and must use over structure near the sea.
ANALISIS PENGENDALIAN KUALITAS STATISTIK INJECTION MOULDING PRODUK CUP PLASTIK Ø 80 mm x 70 mm Etik Puspitasari
INFO-TEKNIK Vol 17, No 2 (2016): INFOTEKNIK VOL. 17 NO. 2 2016
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/infotek.v17i2.2493

Abstract

Plastic is used to make a wide range of products for example to tableware such as plates, cups, spoons and various other equipment. The advantages of this plastic material is resistant to corrosion, its density is low enough so that it can float, process of formation of a plastic material into a product one of them with a system of injection molding plastic products, namely printing process that is generally used for the type of thermoplastic plastics material.The research was conducted on the product plastic cup Ø 80 mm x 70 mm with injection molding systems. using a quality control method that aims to identify and analyze the types of product defects and factors are a major cause of disability so as to minimize the number of defective products and can improve the quality of products produced. From the results of Pareto diagram didapatkan.jenis major flaw for an immediate improvement in product plastic cup Ø 80 mm x 70 mm with injection molding system is defective flashing with a frequency number of failed products by 43% and the probability of failure of 0.43.Based on the fishbone diagram which constitutes the main factor defective product plastic cup Ø 80 mm x 70 mm is flashing where the cause is due to the injection pressure is too high. And remedial efforts to prevent defective products plastic cup Ø 80 mm x 70 mm with a system of injection molding is less injection pressure to minimize or eliminate the flashing because of the high pressure caused the material get into places that are not fitting in the mold.
Pondasi Dangkal diatas Tanah Lunak dengan Perkuatan Cerucuk Galam Berdasarkan Percobaan Lapangan Yusti Yudiawati; Ahmad Marzuki
INFO-TEKNIK Vol 9, No 2 (2008): INFOTEKNIK VOL. 9 NO. 2 2008
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/infotek.v9i2.1755

Abstract

This research studying the behaviour of shallow foundation with cerucuk support. 1,0 m2 reinforced concrete square of shallow foundation model is used, with 5 cm of cerucuk diameter. The research is to find out the foundation ultimate bearing capacity with 1,0 m and 2,0 m length variety of cerucuk, the distance between the pile is 1/4B, 1/3B and 1/2B and also area covered with cerucuk is 1,0 m2, 2,0 m2 and 3,0 m2. To observe the settlement behaviour  is made with giving fixed load of 40%, 60% and 100% of ultimate load ratio at 1,0 m and 2,0 m cerucuk at the same area covered with cerucuk that is 2,0 m2. The result of research shows that the deeper the cerucuk is embedded, the distance between the pile is getting closer and the wider the area covered with cerucuk, the pile ultimate bearing capacity is bigger and the settlement is smaller. To decrease the settlement of shallow foundation, the fixed load that allowable must be < 40 % of ultimate load and Safety Factor must be > 2,5. 
Analisa Drainase Sumur Resapan Pada Kampus UNLAM Banjarbaru Chairil Fachrurazie; Yulian Firmana Arifin; Dewi Sri Susanti
INFO-TEKNIK Vol 3, No 1 (2002): INFOTEKNIK VOL. 3 NO. 1 2002
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/infotek.v3i1.454

Abstract

One of the enviromental drainage that consider water conservation aspect isdrainage by infiltration rehargr system.  Banjarbaru has a high coeffiesient permeability soil and gate on laboratory measurement of soil mechanic, for study area gaied k = 1,23.10 cm/sec dan k = 1,62.10 cm/sec, f = 0,046 m/hr, f = 0,054 m/hr dan f = 0,113 m/hr and ground water level from -7 to -8 meters.  According to rainfall intencity measurement, the rainfall intencity is 71,65 m/hr for 5 year return priode with Q = 0,068 A m3/det.  Result for infiltration recharge system the dimension is get for H = depth of well, R = radius of well, n = number of wells is drawing in graph.
IDENTIFIKASI POTENSI ENDAPAN BIJIH BESI LATERIT DI BAGIAN TENGAH PULAU SEBUKU, PROVINSI KALIMANTAN SELATAN Nurhakim Nurhakim; Untung Dwiatmoko; Romla NH; Adip M.
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.v12i2.1806

Abstract

Sebagian bahan yang diperlukan untuk memenuhi kebutuhan baja nasional saat ini masih dipasok dari luar negeri. Dalam menunjang keperluan industri besi baja yang terus meningkat di masa mendatang, Indonesia sebenarnya memiliki potensi endapan bijih besi yang cukup besar, baik dalam bentuk bijih besi primer, sekunder maupun laterit. Penelitian ini dilakukan untuk mengetahui keberadaan endapan bijih besi laterit di bagian tengah Pulau Sebuku.Secara garis besar, pengerjaan penelitian ini dilakukan dalam tiga tahapan, yaitu : Tahap persiapan dan kajian pustaka, tahap observasi lapangan (pemetaan geologi singkapan), dan tahap pengolahan data. Dari penelitian ini, besi laterit ditemukan ada 2 (dua) endapan, yaitu gravel ore dengan ketebalan 1m–3m dan soil ore dengan tebal antara 2m – 3m, sehingga tebal rata-rata bijih laterit mencapai 5m.
ANALISA DAYA DUKUNG CERUCUK GALAM PADA PERKERASAN RIGID DI RUAS JALAN TATAH BANGKAL Yusgian Yusgian; Muhammad Afief Ma&#039;ruf
INFO-TEKNIK Vol 22, No 2 (2021): INFOTEKNIK VOL. 22 NO. 2 DESEMBER 2021
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/infotek.v22i2.13783

Abstract

Banjarmasin is known as the city of a thousand rivers where the soil is a soft soil with a very low bearing capacity. The Tatah Bangkal road section from sta 0+450 to sta 0+750 is planned to use rigid pavement with a thickness of 28 cm, but during the implementation of galam pile with a length of 4 m, the ones that came to the field was only 3.8 m and when it is tapered, the length is only 3.6 m. In addition, driving the pile directly on the road surface without excavating could not be carried out because the pile was broken and damaged when it was driven to a depth of 1,0 m. The purpose of this analysis is to obtain the length of the galam pile that can be driven into the grained pavement layer without digging until the soil is soft, but its bearing capacity is still achieved to withstand rigid pavement loads and traffic loads. After going through several piling experiments, it turned out that the galam cone was 3.5 m long and the grained pavement was dug up to a depth of 30 cm and the galam pile was not broken.
PENGARUH PENAMBAHAN PASIR TERHADAP NILAI KUAT TEKAN BEBAS PADA TANAH LEMPUNG Esra Yuliaty Girsang
INFO-TEKNIK Vol 23, No 1 (2022): INFOTEKNIK VOL. 23 NO. 1 JULI 2022
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/infotek.v23i1.12926

Abstract

Tanah memiliki peranan penting pada perencanaan dan pekerjaan suatu konstruksi bangunan sipil. Dalam hal ini tanah berfungsi sebagai penahan beban akibat konstruksi diatas tanah yang harus bisa memikul seluruh beban bangunan dan beban lainnya yang harus diperhitungkan, kemudian dapat meneruskan ke dalam tanah sampai pada lapisan atau kedalaman tertentu. Penelitian ini bertujuan untuk mengetahui pengaruh penambahan pasir terhadap nilai kuat tekan bebas pada tanah lempung. Penelitian ini dilakukan secara eksperimen yang dilakukan di laboratorium dengan cara mencampur tanah lempung dengan pasir. Dengan variasi campuran 0%, 5%, 7,5%, 10% dan 12,5%. Berdasarkan klasifikasi AASTHO tanah yang berasal dari Daerah Bukit Rawi, Kabupaten Pulang Pisau Kalimantan Tengah, diklasifikasikan sebagai tanah berlempung dalam kelompok A-7-6 (11), pasir yang berasal dari daerah Kota Palangka Raya, Kalimantan Tengah termasuk dalam klasifikasi A-3 dengan tipe material yang paling dominan pasir halus dan penilaian sebagai bahan tanah dasar baik. Dan menurut klasifikasi tanah USCS tanah tersebut termasuk kelompok CL(lempung anorganik dengan plastisitas rendah sampai dengan sedang lempung berkerikil, lempung berpasir, lempung berlanau, lempung “kurus” (lean clays). Dan pasir yang berasal dari daerah Kota Palangka Raya, Kalimantan Tengah termasuk dalam klasifikasi tanah berbutir kasar. Secara visual, pasir berwarna abu-abu dan mengandung sedikit butiran halus termasuk dalam pasir kelompok SW. Dari hasil pengujian kuat tekan bebas tanah lempung dengan campuran pasir mengakibatkan penurunan nilai kuat tekan bebas (qu) dan nilai kuat geser (cu) dari tanah asli sampai pada variasi campuran 12,5 % pada tanah lempung. Nilai kuat tekan bebas (qu) tanah asli = 0,805 kg/cm2, nilai kuat geser (cu) = 0,4025 kg/cm2. Sedangkan penurunan yang paling besar terjadi pada variasi campuran pasir 12,5% di dapatkan nilai kuat tekan bebas(qu) = 0,485 kg/cm2 dan nilai kuat geser (cu) = 0,2425 kg/cm2. Mengalami penurunan nilai = 0,320 kg/cm2 dengan presentase = 46,58%.
CAPITAL EXPENDITURE DAN OPERATIONAL EXPENDITURE DALAM PERANCANGAN INSTALASI PENGOLAHAN AIR DI KOTA BALIKPAPAN Widya Mulya
INFO-TEKNIK Vol 23, No 1 (2022): INFOTEKNIK VOL. 23 NO. 1 JULI 2022
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/infotek.v23i1.13851

Abstract

The study of project financial feasibility data is prepared based on the theory of project financial management which is inventoried and processed based on the parameter requirements and financial feasibility criteria such as the initial investment budget/capital expenditure (CAPEX) and operational expenditure operating budget (OPEX). Lack of planning and consultation (in relation to project planning) causes high project costs (project costs) and the realization of infrastructure development that is past its deadline (program over-runs) (Asian Development Bank, 2021). Economic analysis determines that the decision to invest in a project is correct from the point of view of economic benefits. Balancing the effects of investing in a project as an advantage, not only for the project management itself, but for the entire community. The water treatment plant is one of the infrastructures that treats raw water (ground water, surface water) into water suitable for consumption in accordance with quality standards. The larger the initial investment budget and the operational cost budget, the higher the cost of treated water. The purpose of this research is to determine the cost of treated water from the calculation of capital expenditure and operational expenditure in the design of water treatment installations in Balikpapan City. CAPEX budget calculations are based on engineering costs, land acquisition costs and construction costs. The OPEX budget includes operating costs, maintenance costs, depreciation expense, administrative and general expenses. Based on the analysis of raw water sources and treatment types, the cost of treated water for conventional treatment types is Rp. 6,197/m³, the cost of DAF type treated water is Rp. 6,991/m³, the cost of RO treated water is Rp. 14,298/m³.

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