cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
-
Contact Email
-
Phone
-
Journal Mail Official
-
Editorial Address
-
Location
Kota pekanbaru,
Riau
INDONESIA
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains
Published by Universitas Riau
ISSN : -     EISSN : -     DOI : -
Core Subject : Engineering,
Engineering
Arjuna Subject : -
Articles 3,145 Documents
 88   89   90   91   92 
Analysis on Worker Productivity at SKPD B1 Office Building Construction Project in Pekanbaru Rodo Hutagalung; Rian Trikomara; Hendra Taufik
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 2 (2016): Wisuda Oktober Tahun 2016
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Pekanbaru City is one of the developing cities aimed by investors. Pekanbaru City has high economic growth, migration, and urbanization rate. Pekanbaru is the capital city of Riau Province and the central government office is located in this city.The economic and population growth in Pekanbaru City has lead to the more demanding administrative services to support the city development.In construction project schedule, worker productivity should be analyzed to determine the work duration and number of workers. Worker productivity indicates the amount of work that could be done by workers in a specified amount of time, based on the project schedule. Worker productivity is greatly influenced by the social background, age, education, and experience of the worker.This study aims to analyze the productivity of workers at SKPD B1 office building construction project in Pekanbaru.Based on the analysis results, the productivity of workers on column, beam, and slab rebar detailing are similar to the productivity value calculated in the previous study by M Shaleh (2010). This is due to the similarity in the volume of the work. However the result of this study varies significantly relative to the productivity value acquired from the provision: “Peraturan Menteri Pekerjaan Umum”, though the provision doesn’t provide details on the dimension of the column, beam, and slab.Keywords: duration, worker productivity, worker index, construction project, SKPD B1 building
Analisa Pengaruh Perubahan Tata Guna Lahan Terhadap Sistem Drainase Kawasan Jalan Dorak Kota Selat Panjang Menggunakan Program Bantu EPA SWMM 5.0 Khoirul Ghofirin; Imam Suprayogi; Bambang Sujatmoko
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 2 (2016): Wisuda Oktober Tahun 2016
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Dorak street in Selat Panjang city an area that in the future is planned as a regional center of government, office and industrial. It is written in the Detailed Spatial Plan (RDTR) Selat Panjang city in 2013-2032.the condition of this area is still dominated by vegetation to absorb the rain now, but with the urban development plan, the vegetation region turned into housing, offices and trade. Such changes affect the condition of the drainage system on the road Dorak so flooding. To prevent more floods it was necessary to predict how much the flod’s high that occurred based on land use in 2032. This study uses EPA SWMM 5.0 to evaluate the ecurade problems. Based on the simulation results with the land usement in 2013 the occurred flood’s high was 0,416 m and the 2032 land usement and flood elevation of 1,165 m. With the change of land use in 2032 floods occur quite high. Gets approximate results with the recent flooding, flood prevention needs to be done by changing the dimensions of the channel. from the simulation results shown channel dimensions are able to cope with the flood is 2.5 m x 2.2 m by adding floodgates.Keywords: Flood, Drainage, EPA SWMM 5.0
Respons Struktur Dan Tingkat Kerusakan Portal Baja Akibat Variasi Pembebanan Dinamik Dengan Analisis Riwayat Waktu Non Linier Vomania, Vomania; Suryanita, Reni; Kurniawandy, Alex
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 2 (2016): Wisuda Oktober Tahun 2016
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Currently, steel is widely used as a starting material in the high-rise building structure because it is more effective and efficient. Otherwise, steel has some drawbacks i.e. prone in collapsed due to dynamic loading. Therefore the aim of this research is to determine of response structure due to dynamic loading. The model is an Open Steel Frame building with a height of 35 m along 10 floors. The type of dynamic loads is harmonic sine and cosines, El Centro earthquake. The dynamic loadings are more precise when they were analyzed using the nonlinier time history method. The harmonic loads on the earthquake load structure are magnitude P0 1 kN, 5 kN and 10 kN load, meanwhile used the history of the El Centro earthquake. Dynamic loads that work suddenly, caused the structure undergoes deformations are not fixed and always have a change within a specified time. The results of the study showed that of these three type of loads, the maximum displacement is 143,885 cm, the maximum velocity is -519,599 cm/dt and the maximum acceleration is 3197,623 cm/dt2 load of the structure caused by sinus. Based on this study it can be concluded that the maximum displacement, velocity and acceleration of a maximum load harmonic sine and cosines is directly proportional to the variation of the value of P0 values getting bigger because then the greater the deformation structure anyway.Key words: dynamic loading, response structure, harmonic loading, time history
Analisis Pengaruh Jarak Pelat Helical Terhadap Daya Dukung Tekan Helical Pile Pada Tanah Gambut Ralan Ditra; Ferry Fatnanta; Muhardi Muhardi
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 2 (2016): Wisuda Oktober Tahun 2016
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Helical piles are a type of foundation that come with helical plate in certain number and space. The research will present the results of loading test using constant rate penetration method conducted on peat soil. Data obtained from the test are load and settlement which then interpreted using both terzaghi and method and tangent intersection method. The result shows no proportional correlation between the load capacity of helical pile withsimilar diameter and the increase of helical plate distance. The bearing capacity of helical pile is influenced by the ratio between the space and the diameter of the plate. The aforementioned load tests are compared with the result of bearing capacity calculationusing individual bearing and cylindrical shear method. It is obtained from the result that the bearing capacity of helical foundation is closer to the behaviour of bearing capacityobtained from cylindrical shear method with 0.633 standard of error while the bearing capacity of individual bearing method is close to the result of standard load test with .637 standard of error.Keyword : helical foundation, peat soil, individual bearing, cylindrical shear.
Sintesis Bio-Pelumas Minyak Minyak Biji Jarak: Pengaruh Rasio Mol Dan Waktu Reaksi Angelina Debbie; Irdoni Irdoni; Nirwana Nirwana
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 2 (2016): Wisuda Oktober Tahun 2016
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

A lubricant is an inseparable part of machine. Lubricants used to protect engine components from worn-out. Along with the increasing demands on materials that are environmentally friendly and renewable, vegetable oils or animal fats based Bio-lubricants can be claim as a solution. Castor oil is an oil that can not be consumed thus potentiallyy used as raw material for bio-lubricants. This research purposes to study the synthesis of bio-lubricants from castor oil to observe the effect of stirring speed and reaction temperature. The research was begun with the saponification of castor oil with 2 N KOH, the reaction temperature at 70 ° C. Solid formed was mixed with 10 N HCl and stirred for 20 minutes and then the formed fatty acid is separated from the rest of reactants. Furthermore, fatty acids will be esterified with etylen glycol on a stirring speed 180 rpm at 150C, with the variation of mole ratio: 1:3,1:4;1:5 and the reaction time: 2,4,6 hours . The highest yield is 91.15% at mole ratio 1:4 for 6 hours with a flash point 302°C, pour point 5°C, density 0.9005 g/ml and viscosity index amounted 145,596.Keywords: Bio-Lubricants, Castor Oil, Yield
Pemanfaatan Limbah Fly Ash Batubara Untuk Pembuatan Paving Block Geopolimer Dengan Variasi Temperatur Curing Dan Rasio Larutan Aktivator Terhadap Fly Ash Wasty Rusjaya; Ahmad Fadli; Drastinawati Drastinawati
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 2 (2016): Wisuda Oktober Tahun 2016
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Paving blocks used as a construction material for roads, parking area, and city parks. The objectives of this research are to make paving blocks of coal fly ash as a raw material in the manufacturing paving blocks, investigate the effect of curing temperature and the ratio of liquid activator/fly ash on the characteristics of the paving block (compressive strength, porosity, density, crystallinity, and morphology) and testing Toxicity Characteristic Leaching Procedure (TCLP) paving block geopolymer. 247,5 gr of coal fly ash were mixed with 742,5 gr of aggregate (sand) and added 82,88 gr of liquid activator as well as 1,26 gr of superplasticizer inside the container. Then, the mixture was strirred and pour into cube mould with size 5x5x5 cm3, subsequently put at room temperature for 24 hours and dried at a curing temperature of 60 °C, 80 °C, 100 °C. The characteristics of were compressive strength, porosity, density, TCLP, crystallinity, and morphology determined. The result show that increasing curing temperature lead to increasing compressive strength and density while the porosity decreased. The compressive strength, porosity, and density of paving blocks were 19,73-49,33 MPa; 4,0-7,6%; 2,0-2,3 g/cm3; respectively and metal contents Zn, Pb, Cu, Cd were 3,591 mg/L; 1,577 mg/L; 1,079 mg/L; and 0,223 mg/L; respectively. The highes of compressive strength 49,33 MPa was obtained at paving blocks paper at the curing temperature of 100 °C and the ratio of liquid activator/fly ash of 0,7.Keywords: curing temperature; fly ash; geopolymer; paving block; liquid activator
Esterifikasi Gliserol Produk Samping Biodiesel Dan Asam Asetat Menjadi Triacetin Menggunakan Katalis Fly Ash Bettry Rifani; Zuchra Helwani; Khairat Khairat
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 2 (2016): Wisuda Oktober Tahun 2016
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Biodiesel is one of the alternative fuel which is made from triglycerides by transesterification alcohol processed and made 10% of byproducts is glycerol. One of the derivative products from glycerol is triacetin. Triacetin have many uses as additives in food and non food products. The research purpose is proccessed of glycerol as byproduct from biodiesel into triacetin using esterification method with catalyst fly ash on the variation concentration (1%, 2% and 3%) of catalyst, reactant mole ratio (1: 5, 1: 7 and 1: 9) and variation of esterification time (1, 2 and 3 hours) towards glycerol conversion. Data processing used the response surface methodology (RSM) and the experimental design used is central composite design. Fly ash catalyst characteristics such as acidity, crystallinity, and surface area increased after activation. The highest glycerol conversion obtained was 79.94% at a concentration of 3% catalyst, reactant mole ratio of 1: 9 and esterification time of 3 hours. Increasing concentrations of the catalyst, reactants mole ratio and time of esterification increase the conversion of glycerol. Esterification time is the most influential factor to increase conversion of glycerol in the production of triacetin.Keywords: catalyst, fly ash, esterification, glycerol, triacetin
Penentuan Model Isoterm Adsorpsi Ion Cu(II) Pada Karbon Aktif Tempurung Kelapa Khamaluddin Aditya; Yusnimar Yusnimar; Zultiniar Zultiniar
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 2 (2016): Wisuda Oktober Tahun 2016
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Copper metal (Cu2+) pollution gives bad impact for society life. One effort to reduce the content of copper metal by using adsorption process. This research used physical activationmethod with temperature at 700oC for 3 hours. This research purpose is to determine the absorptive capacity of the coconut shell activated carbon adsorption and the appropriateadsorption isotherm models. A total of 1 g of coconut shell activated carbon mixed with a solution of CuSO4 with a volume of 100 ml at various concentrations (10, 15, 20, 25 and 30ppm). Then the solution was analyzed by AAS to determine the concentration of Cu ion remaining. The Results showed that the ion adsorption of Cu (II) by a coconut shell activatedcarbon reached equilibrium after a contact time of 90 minutes, and adsorption occured by following the Freudlich adsorption models with correlation coefficient (R2) was 0.9848 and the maximum value of adsorption was 99,96 % mg Cu (II) / g adsorbent.Keywords : Activated Carbon, Adsorption, Ion Cu(II), Coconut Shell and Physics Activation
Pirolisis Kulit Kayu Pinus Merkusii Menjadi Bio-Oil Menggunakan Katalis Cr/Lempung Cengar Febrian, Ramadhoni; Bahri, Syaiful; Khairat, Khairat
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 2 (2016): Wisuda Oktober Tahun 2016
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Bio-oil is produced from biomass through pyrolysis. Then, potential biomass is bark of pine. Bark of pine merkusii can be processed into bio-oil by pyrolysis used Cr/clay catalyst. This research aims to produce bio-oil from bark of pine with Cr/clay catalyst as an alternative fuel, observing the effect of the ratio of catalyst Cr/clay weight to biomass, and observing the influence of Chromium (Cr) impregnation and characterizing physical and chemical characteristic of bio-oil. In the pyrolysis process, 50 grams of pine bark with -100 + 200 mesh, the Cr / clay catalyst with weight variation of the biomass are 3%, 5% and 7% and the variation of Chromium (Cr) impregnation on clay are 0%, 1%, 2% and 3%. And 500 ml of silinap was added to the pyrolysis reactor. Pyrolysis process occurred for 120 minutes at a 320o C and the stirring speed is about 300 rpm. This research resulted in the greatest yield on the use of Cr/clay catalysts 7% of weight to the biomass and 3% metal content is about 65.77%. Characteristics of physical properties was obtained 0.812 g / ml of density, 0.902 cSt of viscosity, 7.626 mg NaOH / gram samples of acidity and 31oC of flash point. While the chemical characteristics of the bio-oil was obtained from the analysis using Gas Chromatography-Mass Spectroscopy (GCMS) and it found several dominant chemical components such as 9,12-Octadecadienoyl chloride, Cyclohexane, 1-methyl-2-penthyl, Octadecanoic acid, 2-Pentene, 24.4-trimethyl and Cyclohexane, 3- (3,3-dimethylbutyl).Keywords: Bio-oil, pyrolysis, bark of pine merkusii, Cr/Clay catalyst
Pembuatan Bio-Oil Dari Kayu Cemara (Causarina Equisetifolal) Dengan Teknologi Pirolisis Menggunakan Katalis MO/NZA Hasnul Bustaman; Syaiful Bahri; Amun Amri
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 2 (2016): Wisuda Oktober Tahun 2016
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Bio-oil can be produced by pyrolisis of causarina wood with catalyst Mo/NZA. The purpose of this research was to produce bio-oil from causarina wood, determine the effect of theimpregnation percentage of Mo metal and ratio of Mo/NZA catalyst on the yield of bio-oil and determine the physical and chemical characteristics of bio-oil. Pyrolysis using 50 grams causarina wood, 500 ml silinap and Mo/NZA catalyst with variations of the impregnation percentage of Mo metal 0%, 0,5%, 1%, 1,5% and the variation ratio of Mo/NZAcatalyst 3% and 5% of the biomass with a stirring speed of 300 rpm and a temperature of 320ºC for 120 minutes. In this research, the highest yield on the variation of the impregnation percentage of metal 1,5% and the ratio of catalyst 5% of the biomass amounted to 66,79%. Characteristics of bio-oil obtained were density 1,012 gr/ml, viscosity 3,14 cP, acid number 75,48 mg NaOH/gr sample, and the flash point 52oC. The results of GC-MS analysis, the dominant chemical components inthe bio-oil were 2-propanone,1-hydroxy- with an area 51,55 % , 1,1’-bibicyclo(2.2.2)octyl-4- carboxylic acid with an area 14,77 % dan 2-Propanone with an area 0,8 %.Keywords: Bio-oil, Pyrolysis, Catalyst Mo/NZA, Causarina wood

Page 90 of 315 | Total Record : 3145

 88   89   90   91   92 

Filter by Year

2014 2022


Reset
Filter By Issues
All Issue Vol 9 (2022): Edisi 1 Januari s/d Juni 2022 Vol 8 (2021): Edisi 2 Juli s/d Desember 2021 Vol 8 (2021): Edisi 1 Januari s/d Juni 2021 Vol 7 (2020): Edisi 2 Juli s/d Desember 2020 Vol 7 (2020): Edisi 1 Januari s/d Juni 2020 Vol 6 (2019): Edisi 2 Juli s/d Desember 2019 Vol 6 (2019): Edisi 2 Juli s/d Desember 2019 Vol 6 (2019): Edisi 1 Januari s/d Juni 2019 Vol 6 (2019): Edisi 1 Januari s/d Juni 2019 Vol 5 (2018): Edisi 2 Juli s/d Desember 2018 Vol 5 (2018): Edisi 2 Juli s/d Desember 2018 Vol 5 (2018): Edisi 1 Januari s/d Juni 2018 Vol 5 (2018): Edisi 1 Januari s/d Juni 2018 Vol 5, No 1 (2018): Wisuda April Tahun 2018 Vol 5, No 1 (2018): Wisuda April Tahun 2018 Vol 4, No 2 (2017): Wisuda Oktober Tahun 2017 Vol 4, No 2 (2017): Wisuda Oktober Tahun 2017 Vol 4, No 1 (2017): Wisuda Februari Tahun 2017 Vol 4, No 1 (2017): Wisuda Februari Tahun 2017 Vol 3, No 2 (2016): Wisuda Oktober Tahun 2016 Vol 3, No 2 (2016): Wisuda Oktober Tahun 2016 Vol 3, No 1 (2016): Wisuda Februari Tahun 2016 Vol 3, No 1 (2016): Wisuda Februari Tahun 2016 Vol 2, No 2 (2015): Wisuda Oktober Tahun 2015 Vol 2, No 2 (2015): Wisuda Oktober Tahun 2015 Vol 2, No 1 (2015): Wisuda Februari Tahun 2015 Vol 2, No 1 (2015): Wisuda Februari Tahun 2015 Vol 1, No 2 (2014): Wisuda Oktober Tahun 2014 Vol 1, No 2 (2014): Wisuda Oktober Tahun 2014 Vol 1, No 1 (2014): Wisuda Februari Tahun 2014 Vol 1, No 1 (2014): Wisuda Februari Tahun 2014 More Issue