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Muhammad Afief Ma'ruf
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Fakultas Teknik Universitas Lambung Mangkurat, Jl. Ahmad Yani Km. 35 Banjarbaru Kalimantan Selatan Telp. (0511)-4773868 Fax. (0511)-4773868
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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 10 Documents
 1 
Search results for , issue "Vol 12, No 1 (2011): INFOTEKNIK VOL. 12 NO. 1 2011" : 10 Documents clear
INTERFACE FRICTION OF SMOOTH GEOMEMBRANES AND OTTAWA SAND Rustam Effendi
INFO-TEKNIK Vol 12, No 1 (2011): INFOTEKNIK VOL. 12 NO. 1 2011
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/infotek.v12i1.1779

Abstract

Geomembranes commonly used in civil engineering constructions are mostly in contact with soils. Some constructions failed due to slippage between geomembrane sheets and interfacing soils. This paper aims at presenting the interface strength of various geomembranes and Ottawa sand resulting from tests with the ring shear device. The interface strength is generally governed by the stiffness, the texture of geomembranes and the imposed stress level. It was found that residual friction angles, dresidual, for the interfaces varied from 10.5° to 28.1° or 0.34 to 0.97 in efficiency ratio. The lower value is for a smooth HDPE, the higher value is mobilised by a soft PVC at higher stresses.
SINTESIS BIODIESEL DARI CRUDE PALM OIL DENGAN KATALIS ALUMINA HASIL RECOVERY LIMBAH PADAT LUMPUR PDAM INTAN BANJAR Doni Rahmat Wicakso
INFO-TEKNIK Vol 12, No 1 (2011): INFOTEKNIK VOL. 12 NO. 1 2011
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/infotek.v12i1.1774

Abstract

The purposed of this research is to prove the ability of alumina which is obtained from PDAM sludge waste as a catalyst in biodiesel syntetic from crude palm oil and to get the optimum additions of alumina catalyst and the optimum temperature of process. Alumina catalyst is a heterogeneous catalyst or a catalyst which is consisting in solid phase. The advantage of this alumina catalyst is its ability to recovered, reusable, and simple in its separation process, because the soluble product in reaction medium could be separated from its catalyst by filtration. Alumina was obtained from PDAM sludge waste by adding NaOH, NH4Cl, and NH4OH in it, then heat at 90oC for 2,5 hours,  filtrated, and dried in the oven. Esterification process works by heating methanol, H2SO4, and CPO at 60oC by comparison of CPO and methanol 1:6 in moles. Continued with transesterification process by temperature variations of 40oC, 50oC, 60oC, and 70oC, also alumina catalyst variations of 3%-b, 4%-b, and 5%-b. After esterification-transesterifications process, we purified crude biodiesel by wash it with aqudest to make pure crude biodiesel.Optimum temperature in this research about 60oC with optimum catalyst about 5%. It was  reasoned by optimum yield we obtained about 70,5%. 
PERENCANAAN TEBAL PERKERASAN LENTUR RUAS JALAN PARINGIN-MUARA PITAP KABUPATEN BALANGAN Yasruddin Yasruddin
INFO-TEKNIK Vol 12, No 1 (2011): INFOTEKNIK VOL. 12 NO. 1 2011
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/infotek.v12i1.1780

Abstract

Jalan raya merupakan prasarana transportasi yang sangat diperlukan, hal ini dikarenakan jalan merupakan penunjang berbagai sektor pembangunan, sarana aktifitas penduduk, dan untuk mempermudah hubungan dari suatu daerah kedaerah lain. Bertambahnya penduduk di Kabupaten Balangan membuat pertumbuhan lalulintas di daerah tersebut meningkat, namun pada pada kawasan antar Desa Batu Piring saat ini prasarana transportasi belum memadai satu sama lain, khususnya untuk prasarana jalan. Oleh karena itu, perlu direncanakannya jalan yang menghubungkan antara daerah Paringin-Muara Pitap, demi memudahkan arus lalulintas di daerah tersebut. Perencanaan perkerasan jalan ini adalah untuk mendapatkan tebal struktur perkerasan lentur dengan menggunakan metode Pt T-01-2002-B yang mengacu pada AASHTO 1993. Pada perencanaan tebal struktur perkerasan lentur ini didapat tebal D1 = 5,00 cm (AC-WC; a1 = 0,4); D1‟ = 6,00 cm (AC-Base; a1 = 0,4); D2 = 16,00 cm (Batu pecah kelas A, CBR 100%; a2 = 0,14 ); D3 = 11,00 cm ( Batu pecah kelas B, CBR 50%; a3 = 0,12). 
WATER BALANCE IN SUMBER MULYA VILLAGE, MERAUKE REGENCY Eprosina Jarmida Soumokil; Ulfa Fitriati
INFO-TEKNIK Vol 12, No 1 (2011): INFOTEKNIK VOL. 12 NO. 1 2011
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/infotek.v12i1.1778

Abstract

Sumber Mulya village is part of Rawa Indah Lowland development area that consists of Kaliki - Sumber Mulya - Jaya Makmur unit. Agricultural area in Sumber Mulya Village is currently processed with relatively small production results due to traditional method of cultivation and water shortage problem.Inflow to Rawa Keramati is larger than the existing irrigation water demand. However, it has only small capacity in utilizing inflow that results in a lot of wasted water during the rainy season. By using Standard Operating Rule model, the most optimum capability of the swamp to fulfil irigation water demand under various canges of cultivation pattern and schedule can be identified.  Optimum result is determined using an approach on Analytical Hierarchy Process (AHP) model.Swamp operation analysis was carried out to the four cultivation schedule alternatives with 100% swamp realase capacity. Based on Analytical Hierarchy Process (AHP) method used for the four cultivation patterns and schedules alternatives reviewed based on adequacy, effectiveness and efficiency factor, the optimum results was obtained at alternative in November. It showed Rawa Keramati water resource capability in supplying Sumber Mulya village water demand with irrigated areas of ±595 Ha, ±594 Ha, and ±593 Ha for the first­crop, second-crop, and third-crop season, respectively.
ANALISIS VARIASI WAKTU DAN KECEPATAN PENGADUK PADA PROSES ADSORPSI LIMBAH LOGAM BERAT DENGAN ARANG AKTIF Isna Syauqiah; Mayang Amalia; Hetty A. Kartini
INFO-TEKNIK Vol 12, No 1 (2011): INFOTEKNIK VOL. 12 NO. 1 2011
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/infotek.v12i1.1773

Abstract

Dalam limbah cuci foto rontgen (limbah fixer) terkandung logam berat Fe dalam jumlah di atas nilai standar mutu limbah cair. Penelitian Ini bertujuan untuk mengetahui pengaruh kecepatan dan waktu pengadukan dalam proses penyerapan logam berat menggunakan arang aktif. Langkah pertama yang dilakukan dalam proses adsorpsi adalah memasukkan limbah fixer  100 mL ke dalam erlenmeyer yang sudah berisi 10 gram arang aktif. Kemudian erlenmeyer tersebut diaduk pada kecepatan aduk 30 rpm. Campuran tersebut kemudian diaduk selama 15 menit, 30 menit dan 45 menit dan didiamkan selama 3 jam.  Mengulangi langkah ini untuk kecepatan pengadukan 60, 90 dan 120 rpm. Setelah proses adsorpsi selesai, kemudian menganalisa banyaknya logam Fe yang terserap dengan menggunakan spektrofotometer pada panjang gelombang disesuaikan. Perlakuan juga diulangi dengan adanya pemanasan. Semakin besar kecepatan pengadukan, lama waktu kontak dan pemanasan yang digunakan semakin meningkat penurunan kadar Fe karena proses penyerapan adsorbat oleh adsorben menjadi lebih baik. Penurunan kadar Fe terbesar terlihat pada kecepatan pengadukan 90 rpm dan waktu aduk 60 menit di mana parameter Fe yang terkandung dalam sampel adalah 0,24 mg/L.
KAJIAN LAMA WAKTU PENGALIRAN TERHADAP BESAR PERESAPAN YANG TERJADI PADA SALURAN DRAINASE PORUS Irfan Prasetia
INFO-TEKNIK Vol 12, No 1 (2011): INFOTEKNIK VOL. 12 NO. 1 2011
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/infotek.v12i1.1775

Abstract

Dalam metode dan perumusan Saluran Drainase Porus oleh Sunjoto (1993), parameter yang digunakan untuk menentukan besarnya debit kehilangan air di saluran adalah tinggi air dalam saluran (m), koefisien permeabilitas tanah (m/s), lebar tengah saluran (m) dan panjang saluran. Adapun pada penelitian ini mencoba untuk mengembangkan metode dan perumusan tersebut dengan mengkaji apakah lama waktu pengaliran memiliki pengaruh terhadap besar peresapan yang terjadi pada saluran drainase porus. Penelitian dilakukan dengan memanfaatkan permodelan saluran draianse porus yang terdapat di Fakultas Teknik Unlam Banjarbaru. Data penunjang seperti data hidrologi dan sampel tanah diperoleh dari data proyek pembuatan model saluran drainase porus dan sumur resapan di Fakultas Teknik Unlam Banjarbaru. Dari hasil penelitian dapat disimpulkan bahwa fungsi waktu (lama waktu pengaliran), ternyata tidak mempengaruhi terhadap besarnya peresapan yang terjadi pada sebuah Saluran Drainase Porus. Sehingga formula yang dikemukakan oleh Sunjoto (1993) ternyata memang telah sesuai dengan aplikasinya di lapangan. Terbukti dari data debit rembesan (Q rembesan) yang terjadi pada 2 kali percobaan konstan sebesar  Q = 3,82 l/d pada percobaan pertama dalam rentang waktu 9 menit dan Q = 3,84 l/d pada percobaan kedua dalam rentang waktu 15 menit
STABILITY ANALYSIS OF OPRIT ON THE SEI TUAK BRIDGE WITH REINFORCEMENT MODULAR SYSTEM DISTRICT PASER, TANAH GROGOT Markawie Markawie
INFO-TEKNIK Vol 12, No 1 (2011): INFOTEKNIK VOL. 12 NO. 1 2011
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/infotek.v12i1.1776

Abstract

Height of oprit on  Sei Tuak Bridge reaches 3,5 m. Oprit made by  new system, modular wall. Advantages of modular system are : construcability, has a positive aspect of the schedule, the number of field workers and office project are few, aspect of quality dan productivity, testing. Modular walls is choosed  to increase aesthetics value. Modular wall are used on sand. However, in Sei Tuak Bridge modular wall built on clay. The purpose of analysis are analyzed stability oprit on the Sei Tuak Bridge. The result of analysis shows : soil active pressure at the first segment is 0.193 ton detained by deadmen is 0.235 ton, at the second segment is 0.2895 ton detained by deadmen is 1.873 ton, at the third segment is 0.2895 ton detained by deadmen is 2.474 ton, at the fourth segment is 0.355 ton detained by deadmen  is 3.075 ton, and the fifth segment is 0.732 ton detained by deadmen is 3.675 ton. Deadmen is located at a distance 3.5 m. Its longer than failure area at 2.103 m. Safety factor of  tierod at the first segment is 22.854, at the second segment 15.236, at the third 15.236, at the fourth segment is 12.425, and at the fifth segment is 6.026. Safety factor of bearing capacity is 1.122. And safety factor of this modular wall  stability is 2.724.
ANALISIS TEORITIS LAYER METHOD DAN EKSPERIMENTAL PERKUATAN BALOK BETON BERTULANG MENGGUNAKAN TULANGAN LONGITUDINAL DENGAN SELIMUT MORTAR Nursiah Chairunnisa
INFO-TEKNIK Vol 12, No 1 (2011): INFOTEKNIK VOL. 12 NO. 1 2011
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/infotek.v12i1.1781

Abstract

Strengthenning and Retrofitting methods already had applicated in buildings. Beam is One of structure elements can be strengthenned  in  order to maintain efficient serviceability structure that can be caused change of function from structures likes overloading or lack of quality control at construction so it can fulfill the code of structures to day and future.  This research had to know about effectiveness strengthening methods of reinforced concrete beams using longitudinal compression and tension reinforcement with jacketing mortar as flexural strengthening  and had to know effectiviness of theoritical methods for interpreting result . In this research specimen models consist of  four specimens: one was control beam (BK), one was monolith beam (BM) and one was strengthened beam (BP)without bonding agent and BP2 was strengthenned beam with bonding agent . All beams were tested under 2-point loading midspan as flexural load and also instrumented for the measurement of mid-span deflection and crack pattern. Test result were  compared to analytical method and program computer based layer method (software Response-2000). The result shows performanced of Response-2000 as layer method an theoritical methods provided equal performances if compared with experimenta method. It can be shown that the percentags  of  Ultimate Load between Response 2000 with experimental method was 107 % -109% for BK, 110,42-111,40% for BM , 83,77% - 83,81% forBP1 dan 87,66-87,70 for BP2. Failure patterns of the control beam (BK) and monolithical beam (BM) were flexural while the strengthened beams had debonding. At this researched, an analythical method (Response-2000)also presented equal performance at failure patterns. It can be shown two specimens (BK and BM) were flexural failured an others (BP1 and BP2) were debonding failured too.
PENGARUH KATALISATOR BASA PADA PRODUKSI BIODIESEL DARI CAMPURAN MINYAK KEDELAI DAN MINYAK JELANTAH Primata Mardina
INFO-TEKNIK Vol 12, No 1 (2011): INFOTEKNIK VOL. 12 NO. 1 2011
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/infotek.v12i1.1772

Abstract

The traditional alkali-catalyzed transesterification for the synthesis of biodiesel from the mixtures of soybean oil and waste cooking oil was carried out in a laboratory scale reactor. The effect of sodium hydroxide (NaOH) concentration as catalyst was investigated. The reaction temperature and stirring speed were maintained constant for 2 hours at 65oC and 600 rpm. For system equipped by agitation, and considered on rotational speed and length of rotor or in this case, magnetic bar, the G-force for this system was 10.06. The optimum condition was obtained at 0.75 wt% NaOH, mixing ratio of feedstock of 60%WCO-SO. The result showed increasing in the amount of NaOH gave a positive effect on a small percentage of waste cooking oil in mixture of feedstock, and negative effect on a greater percentage of waste cooking oil, it was due to that NaOH as alkali catalyst is very sensitive to qualities of feedstock, especially free fatty acid content of feedstock. Free fatty acid inhibited rate of transesterification reaction, and it caused side reaction; saponification reaction. It leads to complicated purification process and reduction of biodiesel as final product.
PENURUNAN ION Fe DAN Mn AIR TANAH KOTA BANJARBARU MENGGUNAKAN TANAH LEMPUNG GAMBUT SEBAGAI ADSORBEN Agus Mirwan; Hesti Wijayanti
INFO-TEKNIK Vol 12, No 1 (2011): INFOTEKNIK VOL. 12 NO. 1 2011
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/infotek.v12i1.1777

Abstract

Indonesia, particularly Kalimantan island has abundant source of clay peat (CP). CP found as soil grain which is composed by silicon-oxygen tetrahedral and aluminium-oxygen octahedral essential form of very fine mineral. CP has ability in color removal, reducing organic matter and heavy metals which are dissolved in water through adsorption process. This research investigated the influence of adsorbent from natural peat clay, physical activated natural peat clay and chemical activated natural peat clay  with CP depth parameter (2, 3 and 4 meters from the soil surface) in adsorbing Fe and Mn from Banjarbaru groundwater. The chemical activation was done by contacting the clay peat with 0.25 M HCl , while the physical activation by burning clay peat in furnace with a temperature of 600oC for 4 hours  This research conducted by contacting the adsorbent with 1liter of water from Rambai well for 300 minutes. The results showed that the clay peat based on physical activation at a depth of 3 m gave the optimum conditions in reduction Fe, as shown from the values obtained was 0.27 mg/L, whereas chemical activation at a depth of 2 m could reduce Mn to be 0.081 mg/L. 

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