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INDONESIA
MEKTEK
Published by Universitas Tadulako
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Articles 145 Documents
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PENGARUH SIKLUS PENGERINGAN DAN PEMBASAHAN TERHADAP KUAT GESER DAN VOLUME TANAH Nurdin, Sukiman
MEKTEK Vol 12, No 1 (2010)
Publisher : MEKTEK

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Abstract

Dry and wetting cycle in tropical area are usual cycle with high intensity. Those usually affect soils to beshrinkage at drying condition. It can be determine by the decrease of soil moisture content. In other hand,swelling process will occur in wetting side that actually cause the increase of volume of soils due to watercontent. This phenomena should be can caused by several factors such as soils mineral, climate (intensity ofrain), humidity and gravitation. This study aims to explore the change of volume and shear strength of soilsdue to dry and wetting cycle.Shrinkage limits test shows that shrinkage limit of soils more than 12%, it can be conclude that the typesoils at Kalukubula regency have slightly swelling potential. At 2 days until 10 days in drying process, theshrinkage limit was 21.37% to 47.87% with soil’s volume change from 18.06% decrease to 6.06%. while inwetting process, the shrinkage limit of soils was 46.70% to 26.06% with soil’s volume change from 0.18%increase to 10.17%. Swelling test shows that the swelling potential of soils was lower that 0.5% to average(0.5%- 1.5%). Shear test results in drying condition had the value of cohesion (c) and soil friction angle (ø)higher than in wetting condition
ABU BATUBARA SEBUAH KONSEP INOVATIF BAGI PRODUKSI BATA ABU ABU UNTUK MEMPEROLEH KEKUATAN TINGGI DAN AMAN TERHADAP LINGKUNGAN (A Literatur Study) Eisenring, Maryo Pitanda
MEKTEK Vol 15, No 1 (2013)
Publisher : MEKTEK

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Abstract

Several experiments have been conducted by using Fly Ash and some similar materials, such as lime, sand, gypsum, quarry dust, Fibre Glass for Bricks-making, which generally aims to get a high-strength brick, and safe for the environment. Fly Ash classified as a B-3 waste is a coal combustion residue generated from burning coal in Steam power plant. Because Fly Ash contains SiO2, Al2O3,P2O5 and Fe2O3, the levels are quite high; the nature of its cement characteristic (pozzolonic) is very good for the use of construction industry. In this paper Fal-G brick production process, uses of rap-trap bond in Fal-G brick masonry prism test study and from the economic point of view it turns out the use of hollow block Fal-G can saveconstruction costs 20 to 30 %. Observations, limitations and suggestions from the various regions have been described.Keywords: Fly ash, rattrap bond, prism test, environment, infrastructure, economy.
STUDI KARAKTERISTIK HUJAN PEMICU LONGSORAN PADA RUAS JALAN TAWAELI-TOBOLI SULAWESI TENGAH Martini Martini
MEKTEK Vol 7, No 2 (2005)
Publisher : MEKTEK

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Abstract

Landslide is one of the most types of slope movements of soil\rock often occur in Indonesia and resulting in damages such as in agriculture land, highways, structures and even casualties. From the researches landslides often take place on the rainy season,as well as when the rain is falling or after the rain stopped. This research will be done in two phases. First phase is a numerical modeling to simulate and predict slope hidrological behavior in respon to rainfall. The rainfalls applied for modeling are high and low intensity that are £ 70  mm/hour and 20 mm/day respectively some hours until days. The rainfall modeling results is used  as the data for next phase that is slope stability analysis. Slope stability will be analiyzed at the initial condition, when raining and after the rain stopped. This research results the decreased of slope stability caused by the rain depends on the intensity and duration of the rain. The research obtains that the rain  intensity of 70 mm/hour is the most potential cause to trigg the landslide than goes of 20 mm/day, 30 mm/hour and 50 mm/hour
ANALISIS PERUBAHAN NILAI SUCTION AKIBAT HUJAN TERHADAP KESTABILAN LERENG Martini Martini
MEKTEK Vol 11, No 3 (2009)
Publisher : MEKTEK

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Abstract

Infiltration of rainfall into slope will have an effect on to condition of slope hydrology and more specifically to characteristic of slope soils, for example pore water pressure value, level of saturation, weight contents of soil, shear strength of soil. Pore water pressure value at dry soil condition or wet condition called as with pore water pressure value negatife or value suction. This suction value will tend to declines and in the end becomes equal to zero or bigger than 0 ( positive pore water pressure) in the event of change of the water content from condition unsaturated to saturated condition. Speed of value change suction becomes positive pore water pressure most influenced by rain intensity. Value suction which is quickest fastest changed at slope at foot of slope
OPTIMASI AKTIVATOR DALAM PEMBUATAN KOMPOS ORGANIK DARI LIMBAH KAKAO Yanqoritha, Nyimas
MEKTEK Vol 15, No 2 (2013)
Publisher : MEKTEK

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Abstract

The purpose of the study is to determine the ability of the composting process composting time to examine the relationship to temperature, pH and levels of C, N, Ratio C / N, P using EM4 activator, MOD 71, sheep dungon cocoa waste biomass. The working principle of the study is to observe and analyze the decomposition ofbiomass wastes cocoa to different activators and observe the process of composting process variables for 7,14, 21, 28, 35, 42, 49, and 56 days with the analysis of temperature, pH and analyze levels of nitrogen (N),Carbon (C), Ratio C / N, and phosphorus (P). Results were obtained in accordance with the optimizationpoint of the graph N, C, Ratio C / N, and P. Then connected to the SNI table, suitable compost is compostactivator biomass using EM4, at 28 days with temperatures 54.88 0C and compost maturation is the 56dayof temperature 28 ° C with a pH of 7.46.Keywords: Biomass, activator, EM4, MOD 71
EVALUASI KINERJA SIMPANG BERSINYAL DI KOTA SURABAYA DENGAN MENGGUNAKAN PROGRAM KAJI (Studi Kasus : Ruas Jalan Ngagel Jaya Selatan ) Tahir, Anas
MEKTEK Vol 7, No 2 (2005)
Publisher : MEKTEK

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Abstract

The growth of vehicle every year give impact to traffic intersection performance. Various resulted by traffic impact arrangement of intersection which is not optimal for example is vehicle queuing, traffic jam , rise in delay  time and also increase travel time. This research  is conducted in one of Major Street in Surabaya, at Ngagel Jaya Selatan street which intersection between  Ngagel Jaya Selatan  and Ngagel Jaya Street. In this research, the analysis by using Kapasitas Jalan Indonesia ( KAJI) that program is program share released by Directorate of Urban Road Development (BINKOT). From result of analysis by using KAJI program, got intersection performance at condition in the morning reside at service of level F with queue length is equal to 1531 m, mean number stops of vehicle is 1,23 stops/pcu and mean intersection delay is 195,83 sec/pcu. In the day time happened queue length is equal to 1483 m, mean number stops of vehicle is 1,50 stops/ pcu and  mean intersection delay is equal to 151,01 sec/pcu with level of service is F. In the evening got queue length is equal to 2458 m, number stops of vehicle is 2,35 stops/pcu and mean intersection delay is  306,71 sec/pcu with level of service F
PERENCANAAN LINGKUNGAN PERMUKIMAN NELAYAN KAMPUNG LERE KOTA PALU Basri, Iwan Setiawan
MEKTEK Vol 11, No 2 (2009)
Publisher : MEKTEK

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Abstract

The growth fisherman settlement is a natural event and this phenomenon is also happened at Kampung Lere so that it taudification as well as inconvenient arrangement. This will potentially decrease environmental quality. The purpose of this research is to assess the possibility of developing a fisherman settlement in kampong Lere without ignoring the environment quality by settlement environmental planning. The research is conducted on August 2002 by survey. The acquired data were then compiled and analyzed by qualitative analysis. The sample included all houses and building in the area. The study area is 31,64 Ha. The result shows that the residence fisherman at Kampong Lere, is to be kept. Settlement environmental planning concept; (1) the sustainability of fresh water, (2) Managing well drainage system, (3) the availability of waste management systems, (4) Conducting Road and pedestrian access system (6) Protection from abrasion by building dam and green program, (7) Proportionally managing border of river and beach, i.e. 30 - 100 m of apex tide sea-water counted from river, and k, and (8 ) Improving physical quality
POTRET PENGADAAN JASA KONSTRUKSI SECARA ELEKTRONIK DI SULAWESI TENGAH Asnudin, Andi
MEKTEK Vol 14, No 3 (2012)
Publisher : MEKTEK

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Abstract

Electronic procurement is expected to be done in an efficient and effective, transparent, accountable and provide equal opportunities for all contractors to be the winning bidder. Descriptive analysis method used in this study, by using contractors who attended the auction on LPSE UNTAD as respondents.The results showed that various problems faced by portrait contractors, among others: the ability of the limited human resources, hardware and software readiness is low, poor data base systems, supporting data is incomplete.The resulting recommendations, among others, (1) an increase in capacity building to all relevant parties, (2) the availability of infrastructure to support electronic procurement system, and (3) allow all parties can access the documents to see the complete contractors that has been in an effort to load up the procurement process transparent and competitive so as to provide equal opportunities for contractors (4) continuously shaped discussion forum involving all stakeholders.
PENGARUH PEMBASAHAN BERULANG TERHADAP PARAMETER KUAT GESER TANAH LONGSORAN RUAS JALAN TAWAELI – TOBOLI Setiawan, Hendra
MEKTEK Vol 7, No 1 (2005)
Publisher : MEKTEK

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Abstract

Tawaeli-Toboli road is an arterial road together with the trans sulawesi road which has an important function in transportation of central sulawesi. Landslide disaster and slope failure which frequently occur in the rainy season is the main problems in this road. Tawaeli-Toboli road traverses a complicated terrain formed by mountain ranges with steep slope angle. The influence of rewetting processed on soil shear strength were done by direct shear test. The results showed that rewetting processed able to decrease soil shear strength
PENGARUH KEPADATAN DAN KADAR AIR TERHADAP HAMBATAN PENETRASI SONDIR PADA TANAH PASIR (Studi kasus: Pasir Sungai Palu) Bontong, Benyamin
MEKTEK Vol 12, No 1 (2010)
Publisher : MEKTEK

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Abstract

The DCPT penatration resistance on each type of soil has a specific characteristic. The aim of this researchis to experimentally study of DCPT penetration resistance (qc and Rf) of sand for several water content (w)and dry density( d ) variation, and comparison with the same parameter of silt. The sample of sand takenfrom Palu-1’s bridge upstream. Test result showed that the variation of “w” have no significant influencefor qc and Rf. The higher thed the higher the qc and Rf. The specific relation of qc, Rf , w and d of sandin comparison with silt by using charts are veryclear and usefull to interpret the soil type

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