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<![CDATA[ANALISIS BENTUK PILAR JEMBATAN TERHADAP POTENSI GERUSAN LOKAL (Studi kasus Model Pilar Penampang Persegi Panjang dan Ellips) ]]>
<![CDATA[Anton Ariyanto]]>
<![CDATA[ Jurnal APTEK Vol. 2 No. 1 (2010): APLIKASI TEKNOLOGI ]]>
Publisher : <![CDATA[Universitas Pasir Pengaraian ]]>
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DOI: 10.30606/aptk.v2i1.19
<![CDATA[Pilar is a structure under the bridge. The presence of pillars in river flow cause changes in river flow patterns. These changes include the formation of down flow (downward flow) and Horseshoe vortex (horseshoe vortex) around the pillar. Changes in flow pattern will result in local scour around the pillar. Local scour is going on around the pillar causes the river bottom around the pillar so that the water flow transported formed scour hole. Scour hole is formed can destabilize the pillar. Stability is very important pillar in the forwarding function of vehicle load to the foundation. This study aims to determine the maximum scour depth value of each form the pillars for any changes debit.Penelitian is done on a permanent uniform flow conditions (steady uniform flow) with three variations of flow rates that occur within the capacity of the appliance Multy-purpose teaching flume.]]>
<![CDATA[PENINGKATAN MUTU KAYU SAWIT DENGAN PERLAKUAN PERENDAMAN BAHAN ANTIOKSIDAN ]]>
<![CDATA[Fakhri -]]>
<![CDATA[ Jurnal APTEK Vol. 2 No. 1 (2010): APLIKASI TEKNOLOGI ]]>
Publisher : <![CDATA[Universitas Pasir Pengaraian ]]>
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DOI: 10.30606/aptk.v2i1.27
<![CDATA[Improving the quality of palm tree trunk has been made to decreasing of fungi intensity. The research objective was to prevent the fungi at various concentrations of antioxidant substances. Antioxidant material used in the form Sodium Hipokrolit, Chlorine and Copper Sulfate each with a variation of solution concentration 5%, 10% and 15% of the weight ratio of water, soaking conducted for 24 hours, fungal growth on observations made during a week of palm wood. Results showed that soaking the material with all concentrations of Sodium Hipokrolit given still not able to prevent mildew, even should the increasing growth of fungi. Soaking with a material optimal chlorine concentration achieved at 15%. Soaking with Copper Sulfate materials can prevent of fungi at 5% concentration.]]>
<![CDATA[KARAKTERISTIK CAMPURAN ASPAL PANAS (ASPHALT CONCRETE-BINDER COURSE) MENGGUNAKAN ASPAL POLIMER ]]>
<![CDATA[Bambang Edison]]>
<![CDATA[ Jurnal APTEK Vol. 2 No. 1 (2010): APLIKASI TEKNOLOGI ]]>
Publisher : <![CDATA[Universitas Pasir Pengaraian ]]>
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DOI: 10.30606/aptk.v2i1.14
<![CDATA[Nearly 99% of Indonesia's flexible pavement made of bituminous mixtures. Damage to the pavement road in general is cracking and permanent deformation. Therefore, the use of additive (additive) on the hot asphalt mix is one way to resolve the issue. One of the ingredients that can improve the quality of pavement is to use materials with a polymer modified bitumen (asphalt modifier).This study aimed to analyze the characteristics of Marshall from the use of asphalt with the addition of polymer additives Starbit E-55 brands in the mix (AC-BC) through the Marshall with the durability testing modifications.]]>
<![CDATA[KAJIAN LAJU SEDIMENTASI WADUK PLTA KOTO PANJANG DALAM UPAYA MELESTARIKAN KESINAMBUNGAN ENERGI LISTRIK PROVINSI RIAU ]]>
<![CDATA[Imam Suprayogi]]>;
<![CDATA[Bochari -]]>
<![CDATA[ Jurnal APTEK Vol. 2 No. 1 (2010): APLIKASI TEKNOLOGI ]]>
Publisher : <![CDATA[Universitas Pasir Pengaraian ]]>
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DOI: 10.30606/aptk.v2i1.28
<![CDATA[Reservoirs in the wet tropics generally have a fairly rapid sedimentation problems. Not infrequently happens that has begun to operate reservoirs showed symptoms of increased sedimentation. This paper aims to find and solve problems that arise due to the high rate of sedimentation and deposition in the Koto Panjang reservoir hydropower, Riau province in an effort to preserve the continuity of electric energy in Riau Province. Method approach taken to describe the pattern of relationship between flow rate, sedimentation and the characteristics of the reservoir as a basis for watershed management in the upstream using regression equations developed by Singh and Chen (1982). The results of the investigation show that the land area (Af) in the upstream has a dominant influence on the rate of annual sediment entering the Koto Panjang reservoir hydropower. For the reduction of land area by 15%, an increase in the volume of sediment from 1.4 million m3 to 11.4 million m3.]]>
<![CDATA[ANALISA PENGARUH TEMPERATUR TUANG DAN TEMPERATUR CETAKAN TERHADAP KEMUNGKINAN MUNCULNYA CACAT RETAK MAKRO PADA PENGECORAN SQUEEZE BENDA TIPIS ALUMINIUM DAUR ULANG ]]>
<![CDATA[Elfendri -]]>
<![CDATA[ Jurnal APTEK Vol. 2 No. 1 (2010): APLIKASI TEKNOLOGI ]]>
Publisher : <![CDATA[Universitas Pasir Pengaraian ]]>
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DOI: 10.30606/aptk.v2i1.6
<![CDATA[Squeeze casting Al-Si casting is the process whereby the liquid Al-Si metal recycling frozen under high pressure so that it will reduce the amount of porosity defects,but tends to experience hot cracking.Parameter of the silicon content of recycled aluminum, cast and mold temperature affects the occurrence of hot cracks in the thin cast body.This study aims to analyze the influence of silicon content, casting and mold temperature on the occurrence of hot cracking in squeeze casting process of thin aluminum recycled objects so that preventive action can be done on the production process.This squeeze casting using hydraulic pressure 135 MPa.Temperatures used are220, 275 and 3300C for mold and 665, 775 and 8850C for the liquid metal. Silicon content of recycled aluminum used are: 0.45, 3.22 and 6.04% weight.Long and hot cracking index is used as measurable indicators of heat cracks.Increasing silicon content will lower the crack length and the index of thin cast aluminum body heat recycling. Increasing temperature and mold castings will increase the length and thermal cracking index aluminum thin cast object of recycling. The combination of casting and mold temperatures low and high silicon composition will produce athin cast aluminum body free of crackedheatrecycle.]]>
<![CDATA[PENDEKATAN MODEL MATEMATIKA SATU DIMENSI PADA SALURAN PENGENDAP PASIR ]]>
<![CDATA[Imam Suprayogi]]>;
<![CDATA[Anton Ariyanto]]>
<![CDATA[ Jurnal APTEK Vol. 2 No. 1 (2010): APLIKASI TEKNOLOGI ]]>
Publisher : <![CDATA[Universitas Pasir Pengaraian ]]>
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DOI: 10.30606/aptk.v2i1.22
<![CDATA[Sandtrap channels are usually found at rivers intake for irrigation purposes. These channel were made to settle sands and prevent them from entering the irrigation channel. As result, the water that enter the irrigation channel will be relatively clean (with small concentration). This objective of this research applying finite different method to solve water flow differential equation as the basis computer`s software construction using Borland Delphi 5 language for sand trap, testing model`s ability against field measurement result, also applying efficiency point and sediment simulation of sandtraps.The analysis of discharge data, flow velocity, water depth, and field measurement result data as basis for total load calculation using Engelund Hansen, Leo Van Rijn, and Enstein Brown formulation approach. The result is using as an input data for sandtrap`s one dimensional empirical model formulation , which was developed by Eysink Vermaas (1983).]]>
<![CDATA[KAJIAN KERETAKAN DRUM BAGIAN ATAS PADA KETEL UAP PIPA AIR ]]>
<![CDATA[Purwo Subekti]]>;
<![CDATA[Sunarno -]]>
<![CDATA[ Jurnal APTEK Vol. 2 No. 1 (2010): APLIKASI TEKNOLOGI ]]>
Publisher : <![CDATA[Universitas Pasir Pengaraian ]]>
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DOI: 10.30606/aptk.v2i1.12
<![CDATA[Boiler tube basically consists of (drum), which closed at the end of the trial stem, where on the inside of the drum there are pipes that serves to drain water or hot gases. In boiler operations are expected not to crash (damage) but the fact is still an interruption in its operations, this led to the cessation of company activities that result in the loss to be borne by the company. The purpose of this study was to analyze the condition of the boiler drum upper material that has been operating in the intervening 10 years. Microstructural examination showed that the damage (cracks) that occur are due to stress corrosion cracking (SCC), as characterized by the formation of the branched cracks (cracks braching). Factors cause of SCC is the tensile stress flow equally with corrosive environment. Residual voltage source is from the welding process in the boiler drum during plugging. In addition, residual stress may also occur due to the influence of corrosive environment forming. And cold, is caused by the influence of boiler feed water. SCC due to KOH (caustic) can be avoided by not doing the welding in the drum, and adjust the pH to be safe areas.]]>
<![CDATA[FORMULATION OF DRILLING FLUIDS FOR HIGH TEMPERATURE WELL APPLICATION USING SABAH BENTONITE ]]>
<![CDATA[Sonny Irawan]]>
<![CDATA[ Jurnal APTEK Vol. 2 No. 1 (2010): APLIKASI TEKNOLOGI ]]>
Publisher : <![CDATA[Universitas Pasir Pengaraian ]]>
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DOI: 10.30606/aptk.v2i1.29
<![CDATA[The objective of this work is to investigate the rheological performance of a locally-sourced bentonite from Sabah for use as drilling fluid against a commercial benonite from India. The rheological properties of the drilling fluids were obtained by using standard testing apparatus such as mud balance, viscometer and filter press. It was observed that the Sabah bentonite has lower values of density, gel strength (GS), plastic viscosity (PV), yield point (YP) and filtration loss as compared to the Indian bentonite. The Malaysian bentonite did not meet the API required viscometer reading of 600 rpm. However it was found that by adding 1.0 ppb of NaOH as an additive to the mud, the rheological performances of the mud improves significantly to meet the API standard. Economic analysis indicates that the treated Sabah bentonite mud is much cheaper than the Indian bentonite by as much as 61%. The results of this work showed that the locally-sourced treated bentonite is technically and economically feasible for use as drilling fluid application.]]>
<![CDATA[PEMBANGKIT LISTRIK TENAGA SURYA PADA PROYEK PENGADAAN AIR BERSIH DESA BATAS ]]>
<![CDATA[Fahrizal -]]>
<![CDATA[ Jurnal APTEK Vol. 2 No. 1 (2010): APLIKASI TEKNOLOGI ]]>
Publisher : <![CDATA[Universitas Pasir Pengaraian ]]>
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DOI: 10.30606/aptk.v2i1.7
<![CDATA[Solar power (SP) is a new technology that is environmentally friendly and have an unlimited source location especially Indonesia, which is at the equator is highly disadvantaged because there is sunshine all year round. It is therefore a very potential new technology is developed on a large - scale in Indonesia that is being suffered an energy crisis. Starting from the problem above, the authors raise and interested at all about Solar Power as a potential energy source is developed in Indonesia, the Batas Village Water Supply Project the use of technology Solar Power Generation.]]>
<![CDATA[KINERJA MARSHALL CAMPURAN LASTON DENGAN AGREGAT BULAT DARI SUNGAI KAMPAR SEBAGAI AGREGAT KASAR ]]>
<![CDATA[Leo Sentosa]]>;
<![CDATA[Elianora -]]>;
<![CDATA[Linda Erly]]>
<![CDATA[ Jurnal APTEK Vol. 2 No. 1 (2010): APLIKASI TEKNOLOGI ]]>
Publisher : <![CDATA[Universitas Pasir Pengaraian ]]>
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DOI: 10.30606/aptk.v2i1.23
<![CDATA[Terms of coarse aggregate to blend the mix of which is shaped kubikal, a plane of rupture of at least two and a rough surface texture, generally in the form of crushed stone, so that granular aggregate have a good interloking in the mix. However, in certain areas of aggregate supply that meets these requirements, sometimes difficult and requires a high cost. Especially in Riau Mainland, crushed stone aggregate shall be imported from Riau Kepuluan (Tanjung Pinang). Meanwhile, the Riau mainland itself has a considerable potential source of material derived from the Kampar River, but it is round and smooth surface texture.]]>
