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JURNAL SAINTIS
Published by Universitas Islam Riau
ISSN : 14107783     EISSN : 25807110     DOI : -
Core Subject : Social, Engineering,
Saintis is devoted to research on civil engineering related fields including geotechnics, transports, structures, water resources and others related with civil engineering topics.
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Articles 224 Documents
Sintesis dan Analisis Penambahan Doping Magnesium (Mg) pada Material Superkonduktor FeSe dengan Metode Reaksi Padatan dalam Tabung Tertutup: Synthesis and Analysis of Magnesium-doped in FeSe Superconductor Materials with Solid-state Reaction Method in Sealed Tubes Maulana, Muhammad Ilham
JURNAL SAINTIS Vol. 19 No. 2 (2019)
Publisher : UIR Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1161.579 KB) | DOI: 10.25299/saintis.2019.vol19(2).3185

Abstract

[ID] Ketergantungan manusia terhadap teknologi memasuki Revolusi Industri 4.0 sangat tinggi. Contoh penerapan inovasi di bidang teknologi informasi salah satunya adalah superkomputer dari material superkonduktor. Material superkonduktor identik dengan material non ferromagnetik karena sifatnya diamagnetis sempurna. Namun, sejak ditemukannya material superkonduktor berbasis logam ferromagnetik, penelitian terus dikembangkan, salah satunya material FeSe. Beberapa parameter yang perlu diperhatikan pada pembuatan material FeSe untuk memperoleh sifat superkonduktor terbaiknya diantaranya komposisi stoikiometri, penambahan doping, dan proses pembuatan material FeSe seperti proses pemaduan dan sintering. Dalam penelitian ini, pengaruh variasi doping Mg akan dianalisis terhadap sifat superkonduktor, morfologi, dan fasa yang terbentuk pada material superkonduktor FeSe. Material FeSe dibuat dengan metode reaksi padatan dalam tabung tertutup (Powder in Sealed Tube) secara insitu. Temperatur sintering yang digunakan 845⁰C yang ditahan selama 6 jam, dengan kenaikan temperatur 7⁰C/menit dari temperatur kamar, dan laju pendinginan normalizing. Kandidat material superkonduktor terbaik terdapat pada sampel Mg0.01Fe0.99Se. Didapatkan Temperatur kritis (Tc)onset = 15.42 K dan Tczero = 5.4 K. Morfologi sampel menunjukkan kristalisasi besar. Lalu, persentase fraksi volume fasa superkonduktornya juga merupakan yang terbesar yaitu 81.99%. [EN] Human dependence on technology into the Industrial Revolution 4.0 is very high. Example, the application of innovations in information technology is supercomputer from superconducting materials. Superconducting materials are identical from non-ferromagnetic materials because tend perfectly diamagnetic. However, since ferromagnetic-metal-based superconducting material discovered, research continues to be developed, like FeSe material. Some parameters that need to be considered in making FeSe material to obtain the best superconductor properties include stoichiometric composition, doping addition, and process of making FeSe materials like synthesis and sintering treatment. In this study, the effect of Mg-doped variations will be analyzed towards properties of superconductors, morphology, and phases formed in FeSe superconducting materials. MgxFe1-xSe made by solid-state reaction method in sealed tube (Powder in Sealed Tube) “insituely”. The sintering temperature used 845⁰C which held for 6 hours, with 7⁰C/minute temperature rise from room-temperature and normalizing cooling rate used. The best candidate superconducting material came from Mg0.01Fe0.99Se, obtained critical temperature (Tc)onset = 15.42 K, and Tczero = 5.4 K. Sample morphology shows a large crystallization. Then, the percentage fraction of the superconducting phase was also the largest, which is 81.99%.
Pengaruh Perubahan Tata Guna Lahan Terhadap Debit Saluran Drainase Jalan Arifin Ahmad Pada Ruas Antara Jalan Rambutan Dengan Jalan Paus Ujung Di Kota Pekanbaru: The Effect of Changes in Land Use on the Discharge of Drainage Channels on Jalan Arifin Ahmad on the Section Between Jalan Rambutan and the Jalan Paus in the City of Pekanbaru Setyawan, Arie; Puri, Anas; Harmiyati, Harmiyati
JURNAL SAINTIS Vol. 18 No. 2 (2018)
Publisher : UIR Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1349.004 KB) | DOI: 10.25299/saintis.2018.vol18(2).3187

Abstract

[ID] Perkembangan kota yang diikuti dengan meningkatnya jumlah penduduk di Kota Pekanbaru menyebabkan terjadi alih fungsi lahan menjadi areal pemukiman ataupun perkantoran. Adanya perubahan fungsi lahan dari areal hijau menjadi areal pemukiman atau perkantoran mengakibatkan terganggunya daya resap tanah sehingga aliran permukaan (run off) menjadi semakin besar. Tujuan dari penelitian ini adalah unutuk mengetahui kemampuan saluran drainase Jalan Arifin Ahmad dalam menampung debit aliran dengan pengaruh perubahan tataguna lahan dalam 10 tahun yang akan dating dan mengetahui penyebab dari tergenangnya air pada salah satu ruas Jalan Arifin Ahmad tepat nya pada ruas antara Jalan Rambutan dengan Jalan Paus Ujung. Pada penelitian ini dilakukan perhitungan frekuensi curah hujan menggunakan jenis uji distribusi Log-Pearson III. Intensitas curah hujan dihitung menggunakan metode rasional. Debit rencana (Qr) berdasarkan jumlah debit hujan (Qh), debit air kotor (Qk) dan debit kiriman (QKiriman). Perubahan tata guna lahan mengacu kepada RTRW kota pekanbaru, kapasitas saluran drinase dihitung menggunakan persamaan manning, dan selanjutnya di analisa apakah saluran tersebut masih mampu menampung debit rencana 10 tahun mendatang dengan perubahan tata guna lahan yang ada. Dari hasil analisa debit rencana 10 tahun mendatang adalah 2,74 m3/detik dengan debit saluran (Qs) sebesar = 0,97 m3/detik untuk saluran tanah dan 2,34 m3/detik untuk saluran permanen, maka dapat disimpulkan bahwa saluran eksisting drainase Jalan Arifin Ahmad pada ruas antara Jalan Rambutan dengan Jalan Puas Kota Pekanbaru tidak aman. Adapun dimensi saluran drainase rencana 10 tahun mendatang adalah lebar dasar saluran (B) = 3,5 m, tinggi permukaan air (h) = 1,75 m, tinggi jagaan air (w) = 0,25 m, dan tinggi saluran (H) = 2 m. Faktor-faktor penyebab terjadinya genangan air pada salah satu ruas Jalan Arifin Ahmad tepatnya pada ruas antara Jalan Rambutan dengan Jalan Paus Ujung adalah tidak mengalirnya air dari badan jalan ke saluran drainase akibat kurang berfungsinya tali air sebagai tempat mengalirnya air hujan dari badan jalan ke saluran drainase, banyaknya sampah dan lumpur yang menyebabkan penyumbatan aliran air pada saluran drainase. Adapun faktor utama nya adalah debit rencana aliran lebih besar dari pada debit saluran eksisting, dimana debit rencana aliran (Qr) = 2,32 m3/detik, debit saluran tanah eksisitng (Qs) = 0,97 m3/detik, dan debit saluran permanen eksisting (Qs) = 2,34 m3/detik. [EN] The development of the city followed by the increasing number of residents in the city of Pekanbaru causing the conversion of land into residential areas or offices. The change of land function from green area to residential area or offices resulted in disturbance of soil absorption so that runoff becomes bigger.The purpose of this research is to know the ability of drainage channel Arifin Ahmad Road in accommodating flow discharge with the effect of land use change in 10 years that will come and know the cause of the water flooding on one of Arifin Ahmad Road segment right on the road between Jalan Rambutan with Jalan Pope Edge. In this research is calculated the frequency of rainfall using the type of Log-Pearson III distribution test. Rainfall intensity is calculated using rational methods. The plan debit (Qr) is based on the amount of rainfall (Qh), gross discharge (Qk) and debit of mail (QKiriman). Land use change refers to RTRW kotabaru, drainage channel capacity is calculated using the manning equation, and then analyzed whether the channel is still able to accommodate the discharge of the next 10 years plan with changes in existing land use.From the results of the next 10 years plan debit analysis is 2.74 m3 / second with the channel discharge (Qs) of 0.97 m3 / sec for the ground channel and 2.34 m3 / sec for the permanent channel, it can be concluded that the drainage existing channel Arifin Ahmad Road on the segment between Jalan Rambutan and Jalan Puas Pekanbaru is not safe. The dimensions of the drainage channel of the plan for the next 10 years are the bottom width of the channel (B) = 3.5 m, the water level (h) = 1.75 m, the water velocity (w) = 0.25 m, and the channel height (H ) = 2 m. The factors causing water puddle on one of Arifin Ahmad Road segment precisely on the road between Rambutan Street and Ujung Pope Road is not the flow of water from the road to the drainage channel due to the lack of functioning of the water line as a place of rain water flow from the road to the drainage channel , the amount of garbage and mud that causes blockage of water flow in the drainage channel. The main factor is the flow of the flow plan is greater than the existing channel discharge, where the flow of the flow plan (Qr) = 2.32 m3 / sec, the discharge of the exisiting ground channel (Qs) = 0.97 m3 / sec, and the permanent channel discharge Existing (Qs) = 2.34 m3 / sec.
Pengaruh Dimensi Tiang Mini Dan Faktor Aman Terhadap Lendutan Pelat Terpaku Tiang Tunggal: The Effect of Mini Pile Dimensions And Safe Factors on The Deflection of Single-Pile Nailed Slab Oktavia, Ferly; Puri, Anas; Mildawati, Roza
JURNAL SAINTIS Vol. 18 No. 2 (2018)
Publisher : UIR Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2086.784 KB) | DOI: 10.25299/saintis.2018.vol18(2).3188

Abstract

[ID] Perkerasan Sistem Pelat Terpaku merupakan pengembangan Sistem Cakar Ayam yang berfungsi sebagai salah satu alternatif solusi untuk mengatasi permasalahan konstruksi jalan pada tanah lunak. Selain itu, kenaikan kapasitas dukung tanah dasar akibat pengaruh dukungan tiang-tiang pada pelat akan mengurangi kebutuhan tebal perkerasan beton dan memperkaku sistem perkerasan. Penelitian ini bertujuan untuk mempelajari pengaruh diameter tiang masif dan faktor aman terhadap lendutan pelat terpaku tiang tunggal. Dimensi struktur pelat terpaku dan data material mengacu pada Puri (2017). Sistem ini dibebani dengan pembebanan tekan sentris. Perhitungan lendutan dan gaya dalam pelat menggunakan metode BoEF, berdasarkan tambahan modulus reaksi tanah dasar ekivalen yang dibandingkan dengan lendutan hasil pengamatan. Hasil analisis menunjukkan bahwa besaran faktor aman mempengaruhi nilai lendutan hitungan. Lendutan hitungan meningkat dengan peningkatan faktor aman. Penggunaan faktor aman 1,0 memiliki pola lendutan mendekati lendutan pengamatan untuk tiang bulat. Analisis perhitungan lendutan dengan ukuran mini pile yang semakin besar menghasilkan lendutan pelat yang semakin kecil. Variasi SF tidak berpengaruh signifikan terhadap momen pelat. [EN] The Nailed-Slab Pavement System is the development from the pavement of the Cakar Ayam System which as an alternative solution to solve the problem of road construction in soft soil. In addition, the increase in bearing capacity of the subgrade due to the influence of the poles support on the plate will reduce the need for thick concrete pavement and strengthen the pavement system. This study aims to learn the effect of massive pole diameter and safe factors on the deflection of single-pile Nailed Slab. The dimensions of the Nailed-slab structure and material refer to Puri (2017). This system is burdened with press centric loading. Calculation of deflection and force in plates uses the BoEF method, based on the additional modulus of the subgrade equivalent reaction which is compared to the deflection observed. The results of the analysis show that the magnitude of the safe factor affects the value of the deflection calcutation. This deflection increases with an increase in safe factors. The use of the safe factor 1.0 has a deflection pattern that is closer to the observation deflection for the round pile. Analysis of the deflection calculation with the size of the mini pile which gets bigger results in a smaller slab deflection. SF variations have no significant effect on the plate moment.
Tinjauan Kapasitas Dukung Pondasi Bored Pile Menggunakan Formula Statis Dan Elemen Hingga 2D Pada Gedung E Fakultas Teknik Universitas Islam Riau: Review of Capacity to Support the Foundation of Bored Pile Using Static Formulas and Finite 2D Elements in Building E, Faculty of Engineering, Islamic University of Riau Pratama, Ramanda; Puri, Anas; Dewi, Sri Hartati
JURNAL SAINTIS Vol. 18 No. 2 (2018)
Publisher : UIR Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1277.867 KB) | DOI: 10.25299/saintis.2018.vol18(2).3189

Abstract

[ID] Pondasi sebagai dasar bangunan harus mampu memikul seluruh beban bangunan dan beban lainnya, untuk diteruskan sampai kelapisan tanah atau batuan dibawahnya. Pemilihan jenis pondasi salah satunya disebabkan oleh jenis tanah dan jenis struktur atasnya, apakah termasuk konstruksi beban ringan atau beban berat, maka dari itu diperlukan stabilitas tanah itu sendiri agar mempunyai kapasitas dukung yang kuat. Tujuan dari penelitian ini menghitung kapasitas dukung aksial, kapasitas dukung lateral, penurunan, defleksi pondasi bored pile menggunakan metode statis dan elemen hingga 2D, menghitung tegangan geser efektif tanah dengan metode elemen hingga 2D yang kemudian membandingkan dengan beban bekerja dan syarat yang diizinkan. Dalam menganalisa beban bekerja pada bangunan dihitung menggunakan bantuan software Etabs v.9. Analisa kapasitas dukung pondasi bored pile tunggal menggunakan metode Aoki & Alancer, Schmertmaan & Nottingham, Begemaan, dan untuk menghitung kapasitas dukung pondasi bored pile (group) digunakan efisiensi kelompok tiang, sedangkan kapasitas lateral dan defleksi digunakan metode Broms dan penurunan pondasi bored pile tunggal menggunakan metode Dee Beer & Marten, untuk kelompok tiang menggunakan metode Vesic dan tegangan geser efektif tanah. Dan akan dilakukan analisa menggunakan elemen hingga 2D dengan bantuan software Plaxis 2D v.8.2. Dari hasil perhitungan dan persentase nilai terbesar kapasitas dukung (Qgall) pondasi bored pilegroup As I-39 dan As C-26 pada titik S-1 dengan metode Schmertmaan & Nottingham sebesar 128%, metode Begemaan sebesar 139% dan elemen hingga 2D sebesar 169% dan dinyatakan pondasi aman terhadap beban yang bekerja pada pile cap, sedangkan metode Aoki & Alancer sebesar 39%, dinyatakan tidak aman terhadap beban yang bekerja pada pile cap. Dan kapasitas beban lateralmetode Broms mampu memikul sebesar 167% dan elemen hingga 2D sebesar 105% dan dinyatakan aman terhadap beban horizontal yang bekerja. Sedang defleksi pondasi bored pile metode Broms sebesar 2,39 mm, elemen hingga 2D sebesar 3,46 mm, dan penurunan pondasi tunggal dengan metode Dee Beer & Marten sebesar 9,78 mm, elemen hingga 2D sebesar 36,40 mm dan pondasi bored pile group metode Vesic sebesar 21,87 mm dan elemen hingga 2D sebesar 16,78 mm, dapat dinyatakan defleksi dan penurunan memenuhi syarat yang diizinkan, dan tegangan geser efektif tanah tunggal tanpa interface dan dengan interface tidak memenuhi syarat yang diizinkan. [EN] Foundation, as the building basic must be able to carry the whole building load and other loads to be forwarded to the soil or rock layers underneath. Selection of the foundation type one caused by the type of soil and the type of structure above, whether included construction of a light load or a heavy load, therefore it needed the stability of the land itself in order to have a strong bearing capacity. The purpose of this studies are to calculate the axial bearing capacity, lateral bearing capacity, decreasing, and bored pile foundation deflection using static and 2D finite element method, and calculate effective shear stress of soil with 2D finite element method, then compare with the workload and terms are allowed. In analyzing the workload on buildings, the calculation using ETABS software v.9. Analysis of bearing capacity of single bored pile foundation use Aoki & Alancer, Schmertmaan & Nottingham, Begemaan method, and to calculate the bearing capacity of bored pile foundation (group) used the pile groups efficiency, while lateral capacity and deflection used Broms method and reduction single bored pile foundation used Dee Beer & Marten method, for pile group using Vesic method and effective shear stress of soil. And will be analyzed using 2D finite element with Plaxis 2D software v.8.2. From the calculation and the percentage of the bearing capacity greatest value (Qgall), bored pile group foundation As I-39 and As C-26 at S-1 point with Schmertmaan & Nottingham method amounted to 128%, Begemaan method amounted to 139% and the 2D finite element amounted to 169 % and foundation declared safe to the load on the pile cap, whereas Aoki and Alancer method amounted to 39%, declared unsafe to load on the pile cap. And the lateral load capacity Broms method capable of assuming at 167% and the 2D finite element about 105% and declared safe to horizontal workload. Bored pile foundation deflection with Broms method amounted to 2.39 mm, 2D finite element amounted to 3.46 mm, and a decrease in single foundation with Dee Beer & Marten method amounted to 9.78 mm, 2D finite element amounted to 36.40 mm and bored pile group foundation Vesic method amounted to 21.87 mm and 2D finite element amounted to 16.78 mm, it can be stated that deflection and decrease are eligible permitted, and effective shear stress of single soil with and without interface are ineligible permitted.
Tinjauan Ulang Terhadap Pondasi Tiang Bor Pada Pembangunan Gedung Mahasiswa Universitas Islam Riau Dengan Metode Elemen Hingga 2D Aksisimetri: Review of the Foundation of Bored Pile in the Construction of the Student Building of the Islamic University of Riau by the Method of Finite 2D Axisymmetry Nanda P., Dicky; Puri, Anas; Dewi, Sri Hartati
JURNAL SAINTIS Vol. 18 No. 2 (2018)
Publisher : UIR Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1638.025 KB) | DOI: 10.25299/saintis.2018.vol18(2).3190

Abstract

[ID] Pembangunan gedung mahasiswa pada kawasan Universitas Islam Riau merupakan bangunan bertingkat 4 yang berfungsi sebagai tempat sekretariat organisasikemahasiswaan, kondisi tanah pada lokasi pembangunanGedung Mahasiswa pada Kawasan Universitas Islam Riaudidapat pada titik sondir 1 pada yaitu sebesar 50 kg/cm2 Sedangkan pada titik sondir 2 yaitu sebesar 100 kg/cm2. Penelitian ini merumuskan masalah apakah daya dukung tiang bor (bored pile) pada bangunan gedung mahasiswa Kawasan Universitas Islam Riau aman terhadap beban aksial, beban lateral dan momen dengan memperhitungkan beban mati, beban hidup, beban angin dan beban gempa, serta Berapa besar penurunan dan defleksi horizontal yang terjadi dengan menggunakan bantuan software ETABS v.9, menghitung kuat dukung, penurunan dan defleksi horizontal dengan metode elemen hingga menggunakan PLAXIS 2D. Pembangunan gedung mahasiswa dikawasan Universitas Islam Riau Pekanbaru yang berlokasi dijalan Kaharuddin Nasution No.113 Marpoyan Damai-Pekanbaru Riau. Parameter tanah menggunakan data uji sondir dengan kedalaman pondasi 12 m dan diameter 30 cm, Metode yang digunakan pada penelitian ini sesuai dengan tujuan penelitian dalam perhitungan daya dukung pondasi bored pile dan perpindahan yang terjadi dengan metode elemen hingga menggunakan PLAXIS 2D. Hasil perhitungan memperlihatkan bahwa kapasitas daya dukung aksial pada titik sondir 1 yaitu sebesar 323,072 kN dan kapasitas daya dukung aksial pada titik sondir 2 yaitu sebesar 432,823 kN sedangkan untuk daya dukung lateral pada titik sondir 1 didapat yaitu sebesar 125,016 kN, pada titik sondir 2 yaitu sebesar 190,703 kN dan penurunan pada titik sondir 1 yaitu 40,04 mm dan pada titik sondir 2 yaitu 25,69 mm sedangkan untuk defleksi horizontal pada titik sondir 1 yaitu 10,91 mm dan pada titik sondir 2 yaitu 6,81 mm. Jadi defleksi horizontal yang terjadi pada titik sondir 1 dan 2 belum memenuhi syarat yang di ijinkan. [EN] The construction of a student building in the Riau Islamic University area is a 4-storey building that serves as a place for student organization secretariat, soil conditions at the construction site. The Student Building in the Islamic University Area of ​​Riaud can be found at sondir 1 at 50 kg / cm2, whereas at sondir 2 is 100 kg / cm2. This study formulates the problem of whether the carrying capacity of bored piles in the buildings of the Riau Islamic University Region building is safe from axial loads, lateral loads and moments by calculating dead loads, live loads, wind loads and earthquake loads, and how much reduction and deflection horizontal that occurs using the help of ETABS v.9 software, calculates the horizontal bearing strength, decrease and deflection using the finite element method using PLAXIS 2D. The construction of a student building in the Riau Islamic University area of ​​Pekanbaru, located on the Kaharuddin Nasution street No.113 Marpoyan Damai-Pekanbaru Riau. Soil parameters using sondir test data with a foundation depth of 12 m and a diameter of 30 cm, the method used in this study is in accordance with the research objectives in calculating the carrying capacity of the bored pile foundation and displacement that occurs with the finite element method using PLAXIS 2D. The calculation results show that the axial carrying capacity at sondir point 1 is 323,072 kN and the axial carrying capacity at sondir point 2 is 432,823 kN while for lateral carrying capacity at sondir point 1 is 125,016 kN, at sondir 2 190,703 kN and decrease at sondir point 1 is 40,04 mm and at sondir point 2 is 25,69 mm while for horizontal deflection at sondir point 1 is 10.91 mm and at sondir point 2 is 6,81 mm. So the horizontal deflection that occurs at sondir 1 and 2 does not meet the permitted requirements.
Karakteristik, Tipologi, Urban Sprawl: Characteristics, Typology, Urban Sprawl. Firdaus, Firdaus; Asteriani, Febby; Ramadhani, Anissa
JURNAL SAINTIS Vol. 18 No. 2 (2018)
Publisher : UIR Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1186.075 KB) | DOI: 10.25299/saintis.2018.vol18(2).3191

Abstract

[ID] Penelitian ini bertujuan untuk mengetahui karakteristik, tipologi, dan tingkat urban sprawl yang terjadi di Kota Pekanbaru. Sampel penelitian sejumlah 99 dari 7.646 jumlah bangunan yang terdigitasi. Mengetahui karakteristik dan tipe urban sprawl digunakan analisis deskriptif dengan pendekatan spasial dan untuk tingkat urban sprawl dilakukan dengan pemberian scoring pada variable urban sprawl. Hasil penelitian menunujukkan bahwa karakteristik urban sprawl dicirikan dengan penggunaan lahan terpisah yang terletak jauh dari pusat-pusat permukiman, kepadatan penduduk rendah sekitar 4.499 jiwa/km2, penggunaan mobil pribadi yang tinggi pada jam sibuk yakni sebesar 5.945 unit setiap hari. Tipe urban sprawl yang dominan adalah perembetan memanjang dan perembetan meloncat terjadi pada jalan arteri maupun kolektor, sedangkan perembetan meloncat terjadi di beberapa kelurahan. Kelurahan Delima dan Kelurahan Tuah Karya termasuk pada tipologi ke-1 dengan tingkat urban sprawl rendah, dan tipologi ke-2 dengan tingkat urban sprawl sedang terjadi di Kelurahan Sidomulyo Barat, sedangkan Kelurahan Simpang Baru termasuk pada tipologi ke-3 dengan tingkat urban sprawl tinggi. [EN] This study aims to determine the characteristics, typology, and levels of urban sprawl that occur in the city of Pekanbaru. The study sample numbered 99 out of 7,646 numbers of digitalized buildings. Knowing the characteristics and types of urban sprawl used descriptive analysis with a spatial approach and for the level of urban sprawl carried out by giving scoring to urban sprawl variables. The results of the study show that the characteristics of urban sprawl are characterized by separate land uses located far from residential centers, low population density of around 4,499 people / km2, high private car use during peak hours which is 5,945 units per day. The dominant type of urban sprawl is longitudinal infiltration and jumping leaks that occur on arterial roads and collectors, while leachates jump in several villages. The Delima and Tuah Karya Villages included in the 1st typology with a low level of urban sprawl, and the second typology with the level of urban sprawl was occurring in Sidomulyo Barat Village, while the Simpang Baru Village was included in the 3rd typology with high urban sprawl.
Kajian Potensi Kerusakan Lingkungan Fisik Akibat Penambangan Breksi Batu Apung , Di Desa Segoroyoso, Kec. Pleret, Kab. Bantul, Provinsi DIY: Study of Potential Physical Damage Potential Due to Pumice Breccia Mining, in Segoroyoso Village, Pleret District, Bantul, Special Region of Yogyakarta Province Agus Candra
JURNAL SAINTIS Vol. 18 No. 1 (2018)
Publisher : UIR Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1082.923 KB) | DOI: 10.25299/saintis.2018.vol18(1).3193

Abstract

[ID] Sumber daya alam merupakan salah satu modal dasar dalam pembangunan nasional. Oleh karena itu harus dimanfaatkan sebesar-besarnya untuk kepentingan rakyat dengan memperhatikan kelestarian lingkungan hidup sekitarnya. Sumber daya alam di Indonesia cukup banyak dan melimpah sehingga terkadang sebagian dieksploitasi secara besar-besaran untuk kebutuhan pembangunan. Penambangan breksi batuapung di Desa Segoroyoso, Kecamatan Pleret Kabupaten Bantul dilakukan secara tradisional. Penambangan dilakukan tanpa memperhatikan keselamatan dan kelestarian fungsi lingkungan sangat mengkhawatirkan disamping kondisi lahan yang semakin kritis dan berdampak terhadap kerusakan lahan disekitar penambangan. Kerusakan yang dapat ditimbulkan akibat dari kegiatan penambangan breksi batuapung adalah dapat merusak komponen-komponen lingkungan fisik yang ada, seperti tanah, batuan, vegetasi yang ada pada kawasan tersebut dan menimbulkan kerusakan terhadap kelestarian fungsi lingkungan. Metode yang digunakan dalam penelitian ini adalah metode survey, pemetaan, dan analisis dengan menggunakan pengharkatan (scoring) yang mengacu pada Kep. Gub. Prop. DIY No. 63 Tahun 2003. Parameter yang digunakan untuk menentukan tingkat kerusakan lingkungan fisik penambangan breksi batuapung adalah Batas kedalaman lubang galian, Penyelamatan tanah pucuk, Relief dasar galian, Batas kemiringan tebing galian, tinggi dinding galian, upaya reklamasi, kondisi jalan, aksesibilitas. Tingkat kerusakan lingkungan fisik akibat penambangan breksi batuapung diperoleh dari hasil penjumlahan skor setiap parameter. Kriteria kerusakan dibagi menjadi 3 tingkat, yaitu: Tingkat I dengan kriteria rusak ringan, Tingkat II dengan kriteria rusak sedang, dan Tingkat III dengan kriteria rusak berat. Berdasarkan hasil scoring dari parameter yang tercantum di atas, penelitian ini menunjukan bahwa yang sangat mempengaruhi potensi kerusakan lahan akibat penambangan breksi batuapung di Desa Segoroyoso, Kec. Pleret, Kab. Bantul adalah tinggi dinding galian, kemiringan dinding galian, upaya reklamasi dan relief dasar galian, hampir disetiap lokasi penelitian (blok-1, blok-2, blok-3) mempunyai harkat 2 dan 3 dengan kriteria rusak ringan dan rusak berat, sedangkan untuk parameter pengelolaan tanah pucuk, kedalaman galian, kondisi jalan dan aksesibilitas mempunyai harkat 1 dengan kriteria baik. [EN] Natural resources are one of the basic capital in national development. Therefore it must be utilized as much as possible for the benefit of the people by paying attention to the preservation of the surrounding environment. Natural resources in Indonesia are quite large and abundant so that sometimes some are exploited on a large scale for development needs. The pumice breccia mining in Segoroyoso Village, Pleret District, Bantul Regency is done traditionally. Mining is carried out without regard to the safety and preservation of environmental functions which is very worrying in addition to the increasingly critical land conditions and the impact on land damage around the mine. The damage that can be caused due to mining activities of pumice breccia is that it can damage the components of the existing physical environment, such as soil, rocks, vegetation in the area and cause damage to the preservation of environmental functions. The method used in this study is the method of surveying, mapping, and analysis using scoring which refers to Kep. Gub. Prop. DIY No. 63 of 2003. Parameters used to determine the level of damage to the physical environment of mining of pumice breccia are the depth limit of excavation holes, Rescue of topsoil, Relief base of excavation, Slope limit of rock excavation, High wall excavation, Reclamation efforts, Road conditions, accessibility. The level of damage to the physical environment due to mining of pumice breccia is obtained from the sum of the scores of each parameter. Damage criteria are divided into 3 levels, namely: Level I with criteria for minor damage, Level II with criteria for moderate damage, and Level III with criteria for severe damage. Based on the scoring results of the parameters listed above, this study shows that it greatly affects the potential for land damage due to mining of pumice breccia in Segoroyoso Village, Kec. Pleret, Kab. Bantul is the height of the excavation wall, slope of the excavation wall, reclamation and relief baseline excavation, almost every study location (block-1, block-2, block-3) has a value of 2 and 3 with criteria of minor damage and severe damage, while for parameters management of topsoil, depth of excavation, road conditions and accessibility have a rating of 1 with good criteria.
Analisa Penggunaan Sumber Daya Manusia Dengan Metode Resource Leveling Pada Pelaksanaan Proyek Konstruksi (Studi Kasus : Proyek Pembangunan Ruang Kelas Baru Ponpes Daarun Nahdah Thawalib Bangkinang): Analysis of the Use of Human Resources with Resource Leveling Methods in the Implementation of Construction Projects (Case Study: New Classroom Construction Project of Daarun Nahdah Thawalib Islamic Boarding School Bangkinang) Deddy Purnomo Retno; Astuti Astuti; Zulfadli Tamimi
JURNAL SAINTIS Vol. 18 No. 1 (2018)
Publisher : UIR Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (863.978 KB) | DOI: 10.25299/saintis.2018.vol18(1).3194

Abstract

[ID] Tenaga kerja merupakan salah satu sumber daya manusia yang penting, karena seringkali penyediaannya terbatas, baik karena faktor kualitas maupun hal-hal lain. Kemudian kelebihan tenaga keja akan mengakibatkan pemborosan biaya serta kekurangan tenaga kerja akan mengakibatkan keterlambatan pelaksanaan proyek yang telah dijadwalkan. Tujuan tugas akhir ini adalah untuk menentukan sumber daya manusia yang efektif dalam pelaksanaan proyek Pembangunan Ruang Kelas Baru Ponpes Daarun Nahdah Thawalib Bangkinang, dan untuk mengetahui berapa banyak biaya yang diperlukan untuk kebutuhan penggunaan sumber daya manusia. Metode Perataan Sumber Daya (Resource Leveling) dapat digunakan untuk mendapatkan histogram penggunaan tenaga kerja yang efektif dalam pelaksanaan proyek konstruksi sehingga tidak terjadi penurunan dan peningkatan penggunaan tenaga kerja diawal, ditengah dan diakhir jadwal pelaksanaan pekerjaan. Proses Resource Leveling dilakukan menggunakan bantuan aplikasi Microsoft Project 2013. Dari hasil penelitian diperoleh penggunaan tenaga kerja rencana dan tenaga keja setelah perataan (leveling) yaitu sebanyak 790 orang dengan biaya sebesar Rp. 375.270.000,00 yang terdiri dari 470 orang pekerja dengan biaya sebesar Rp. 207.270.000,00 dan 320 orang tukang dengan biaya sebesar Rp. 168.000.000,00. Sedangkan tenaga kerja realisasi atau lapangan sebanyak 831 orang dengan biaya sebesar Rp. 382.011.000,00 yang terdiri dari 646 orang pekerja dengan biaya sebesar Rp. 284.886.000,00 dan 185 orang tukang dengan biaya sebesar Rp. 97.125.000,00. Dengan demikian tenaga kerja rencana dan setelah perataan lebih hemat biaya sebesar Rp. 6.741.000,00 dibandingkan tenaga kerja realisasi. [EN] Labor is one of the most important human resources, because it is often limited in provision, both because of the quality factor and other things. Then the excess work force will lead to waste of costs and labor shortages will result in delays in the implementation of projects that have been scheduled. The purpose of this thesis is to determine the effective human resources in the implementation of the New Classroom Building Project Ponpes Daarun Nahdah Thawalib Bangkinang, and to find out how much cost is needed for the needs of human resource use. Resource Leveling Methods can be used to obtain an effective employment histogram in the implementation of a construction project so that there is no decrease and increased use of labor at the beginning, middle and end of the job execution schedule. The Resource Leveling process is done using Microsoft Project 2013 help. From the result of the research, it is found that the use of workforce of plan and work force after leveling is 790 people with the cost of Rp. 375,270,000.00, consisting of 470 workers at a cost of Rp. 207.270.000,00 and 320 craftsmen at a cost of Rp. 168,000,000.00. While the labor realization or field as many as 831 people with a fee of Rp. 382.011.000,00 consisting of 646 workers with a fee of Rp. 284,886,000,00 and 185 carpenters at a cost of Rp. 97.125.000,00. Thus the workforce of the plan and after smoothing is more cost effective at Rp. 6,741,000.00 compared to realization workforce.
Perbandingan Kuat Tekan Dan Kuat Lentur Beton Mutu Tinggi Dengan Menggunakan Berbagai Merk Semen Di Kota Pekanbaru: Comparison of the Strength and Strength of Bending of High Quality Concrete by Using Various Brands Cement in Pekanbaru City Roza Mildawati
JURNAL SAINTIS Vol. 18 No. 1 (2018)
Publisher : UIR Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1217.041 KB) | DOI: 10.25299/saintis.2018.vol18(1).3195

Abstract

[ID] Concrete is a very popular building material used in the world of construction services, consisting of a mixture of Portland Cement (PC) or other hydraulic cement, fine aggregates, coarse aggregates and water, with or without using additional materials. The quality of materials such as cement also greatly affects the strength of the concrete after hardening, so the selection of cement quality must be in accordance with the concrete planning regulations in order to obtain optimal results. In Indonesia there are many new cement factories that produce to meet the needs of the community, one of which is the Conch brand cement. So in connection with the above, Conch cement can be examined to compare the value of compressive strength and flexural strength with old cement, namely cement Padang, Tiga Roda, Holcim and Bosowa which are generally always used in concrete planning at this time.The purpose of this study was to determine the comparison of compressive strength and flexural strength of the concrete and the multiplier between cement Padang, Three Wheels and Conch at 28 days of age. In this study using the method SNI 03-2834-2000. With cylindrical test specimens (150 mm x 300 mm) and size beams (150 mm x 150 mm x 600 mm) three specimens were made for each cement.The maximum concrete compressive strength is found in Padang cement with a compressive strength of 45.86 Mpa, for the minimum compressive strength found in Tiga Roda cement with compressive strength value of 40.19 Mpa and for the compressive strength of cement Conch there is a second with compressive strength value 42.84 Mpa. From the explanation above, the results of 28 days of concrete compressive strength with each cement brand still not reached the planned concrete compressive strength of 38 MPa. The maximum concrete flexural strength is found in Padang cement with a flexural strength value of 5.03 Mpa, for a minimum flexural strength value found in Tiga Roda cement with a flexural strength value of 3.96 Mpa and for the value of Conch cement compressive strength there is a second with flexural strength 4.43 Mpa. From the explanation above, the results of 28 days of concrete flexural strength with each cement brand that has not reached the 4.4 Mpa plan, namely the three-wheeled cement brand. [EN] Concrete is a very popular building material used in the world of construction services, consisting of a mixture of Portland Cement (PC) or other hydraulic cement, fine aggregates, coarse aggregates and water, with or without using additional materials. The quality of materials such as cement also greatly affects the strength of the concrete after hardening, so the selection of cement quality must be in accordance with the concrete planning regulations in order to obtain optimal results. In Indonesia there are many new cement factories that produce to meet the needs of the community, one of which is the Conch brand cement. So in connection with the above, Conch cement can be examined to compare the value of compressive strength and flexural strength with old cement, namely cement Padang, Tiga Roda, Holcim and Bosowa which are generally always used in concrete planning at this time.The purpose of this study was to determine the comparison of compressive strength and flexural strength of the concrete and the multiplier between cement Padang, Three Wheels and Conch at 28 days of age. In this study using the method SNI 03-2834-2000. With cylindrical test specimens (150 mm x 300 mm) and size beams (150 mm x 150 mm x 600 mm) three specimens were made for each cement.The maximum concrete compressive strength is found in Padang cement with a compressive strength of 45.86 Mpa, for the minimum compressive strength found in Tiga Roda cement with compressive strength value of 40.19 Mpa and for the compressive strength of cement Conch there is a second with compressive strength value 42.84 Mpa. From the explanation above, the results of 28 days of concrete compressive strength with each cement brand still not reached the planned concrete compressive strength of 38 MPa. The maximum concrete flexural strength is found in Padang cement with a flexural strength value of 5.03 Mpa, for a minimum flexural strength value found in Tiga Roda cement with a flexural strength value of 3.96 Mpa and for the value of Conch cement compressive strength there is a second with flexural strength 4.43 Mpa. From the explanation above, the results of 28 days of concrete flexural strength with each cement brand that has not reached the 4.4 Mpa plan, namely the three-wheeled cement brand.
Faktor yang Berhubungan dengan Penggunaan APD pada Pekerja Teknisi Mesin di PT PLN Rayon Tembilahan: Factors of Relating to the Use of PPE in Machine Technicians at PT PLN Rayon Tembilahan Firman Edigan; Deny Pratama Putra
JURNAL SAINTIS Vol. 18 No. 1 (2018)
Publisher : UIR Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1002.918 KB) | DOI: 10.25299/saintis.2018.vol18(1).3196

Abstract

[ID] PT PLN Rayon Tembilahan adalah perusahaan yang bergerak di bidang penyediaan tenaga listrik, pada penelitian awal terdapat pekerja pada shift siang masih banyak pekerja yang tidak menggunakan APD dengan lengkap sesuai dengan bagian pekerjaanya. Tujuan penelitian ini untuk mengetahui hubungan pengetahuan pekerja, kondisi lingkungan, ketersediaan sarana, pengawasan terhadap penggunaan APD pada pekerja teknisi mesin di PT PLN Rayon Tembilahan. Metode penelitian yang digunakan adalah penelitian kuantitatif dengan desain penelitian Cross Sectional. Sampel dalam penelitian ini menggunakan total sampling dimana pekerja teknisi mesin di PT PLN Rayon Tembilahan yang berjumlah 35 orang. Analisis data secara univariat dan bivariat dengan uji-square. Hasil penelitian yang diperoleh tidak ada hubungan pengetahuan dengan penggunaan APD dengan nilai p=0,899, adanya hubungan kondisi lingkungan dengan penggunaan APD dengan nilai p=0,022 dan diperoleh nilai OR=8,500, adanya hubungan sarana prasarana dengan penggunaan APD dengan nilai p=0,031 dan diperoleh nilai OR=6,857, tidak ada hubungan pengawasan dengan penggunaan APD dengan nilai p=0,854 dan diperoleh nilai OR=1,429. Diharapkan kepada pihak PLN Rayon Tembilahan agar memperihatikan kondisi lingkungan kerja dan bisa melengkapi sarana prasarana untuk pekerja agar dapat mengurangi resiko terhindar dari kecelakaan kerja. [EN] PT PLN Rayon Tembilahan is a company in the provision of electric power, In the initial study there are workers in the afternoon shift there are still many workers who do not use the complete PPE related with their work, the purpose of this study to determine the relationship of worker knowledge, environmental conditions, the availability of facilities, supervision of the use of PPE on workers in the engine technician PT PLN Rayon Tembilahan. The research method used is quantitative research with Cross Sectional research design. The sample in this research use total sampling where machine technician workers in PT PLN Rayon Tembilahan which amounted to 35 person. Univariate and bivariate data analysis with square test. The result of this research is no correlation with the use of PPE with p = 0,899, there is relation of environmental condition with PPE usage with p value = 0,022 and obtained value OR = 8,500, there is correlation of facility of infrastructure by using PPE with p value = 0,031 and Value OR = 6.857, there is no relationship of supervision with the use of PPE with the value p = 0.854 and obtained the value OR = 1.429. It is expected to PLN Rayon Tembilahan to envisage the condition of the work environment and can equip the infrastructure for workers to reduce the risk of avoidance of work accident.