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All Journal Jurnal Sains dan Teknologi APTEK Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Rekayasa Sipil Journal of Engineering and Technological Sciences Proceedings ACES (Annual Civil Engineering Seminar) JURNAL SAINTIS APTEK Jurnal Teknik Sipil Institut Teknologi Padang SAINSTEK Jurnal Teknologi & Rekayasa Sipil BATOBO: Jurnal Pengabdian Kepada Masyarakat Journal of Infrastructure and Construction Technology
Alex Kurniawandy
Universitas Riau
Civil Engineering, Building, Construction & Architecture Computer Science & IT Education Electrical & Electronics Engineering Engineering Environmental Science Materials Science & Nanotechnology Mechanical Engineering Transportation Other

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Analisa perbandingan Kuat Tekan Beton Semen PCC Dan Semen Tipe 1 Terhadap Pemakaian Sikament NN Istighfar, Irfan; Kurniawandy, Alex; Ermiyati, Ermiyati
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 1, No 1 (2014): Wisuda Februari Tahun 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

The state of the art in cement manafacturer produces cement that can give high quality concrete and environmentally sustainable, which of product is Portland Composite Cement (PCC). This research aim to find solution to increase the compressive strength of PCC approaching the value of Ordinary Portland Cement (OPC) Compressive Strength. One of the solution is by adding Sikament NN into the concrete mixture. Samples are in Cylindrical shape 15 cm diameter and 30 cm height in age of test 7, 28 and 91 day with 3 samples per each. Design of mix composition use ACI method with w/c 0,4 ; 0,35 ; 0,3. The initial time for OPC  is 92,99 minute and the final setting time is 150 minute, the initial time for PCC is 119,17 minute and final setting time is 165,5 minute. The initial time for OPC  with Sikament NN is 222,5 minute and final setting time is 285 minute, the initial time for PCC with Sikament NN is 247,5 minute and final setting time is 300 minute. The result of compressive strength at age of samples of 7, 28 and 91 days with FAS of 0,4; 0,35; and 0,30; shows higher compressive strength of type 1 cement compared to PCC cement’s compressive strength and higher compresive strength of type 1+Sikament NN compared to PCC+Sikament NN’s compresive strength and higher compresive strength of PCC+Sikament NN compared to type 1 cement’s compressive strength.  Keyword : Compressive Strength, PCC cement, Type 1 cement , initial time, Sikament NN
Analisis Perbandingan Metode Westergrand Terhadap Metode Desain Langsung Dan Metode Portal Ekivalen Pada Flat Plate Ramadhan, Rian; Djauhari, Zulfikar; Kurniawandy, Alex
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 2, No 2 (2015): Wisuda Oktober Tahun 2015
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

All this time the analysis and design of plate is often done by using approach method such as Westergrand that commonly used and also use the Direct Design methods and EquivalentFrame methods, this approach method is more often used because it is very difficult to plan a plate with using numerical methods such as finite element method although the results will be more exact. This study aims to determine the comparison between Westergrand method, Direct Design method and Equivalent Frame method, espe cially when applied to the plates that do not have beams such as Flat Plate. This comparison is done in order to see how good this method in terms of ease of calculation, the results of moments, reinforcement and deflection result and in order to see how the behavior of Flat Plate when analyzed using these methods.This research results showed Westergrand method have easier calculation methods when compared to the Direct Design method and Equivalent Frame method but Westergrand method will give a smaller value than the Direct Design method and Equivalent Frame method in terms of moments, reinforcement and deflection. Based on the research results that higher the ratio between long span and short span, the plate behavior will be getting closer to the of one wayaction and corner panel receive the largest proportion of the load from interior and exterior panels.Keyword Plate, Westergrand Method, Direct Design Method, Equivalent Frame Method
Sifat Mekanis Beton Akibat Pengaruh Steel Slag Sebagai Bahan Subtitusi Agregat Halus dengan Agregat Lokal Riau Wirma, Rizki; Kurniawandy, Alex; Ermiyati, Ermiyati
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

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Abstract

The research has a purpose to study the mechanical properties of concrete when using steel slag as an alternative for subtituting sand material in the mixture of concrete with fc’ 25 MPa. This research consisted of 6 tests. They were permeability, porosity, shrinkage, compressive strength, Scanning Electronic Microscope (SEM) and Energy Dispersive Spectrometry (EDS). The steel slag used were 0 % and 30 % of total weight of sand. The permeability and porosity test were carried out at 28 days. The shrinkage test was conducted at 7 days. The compressive strengths were tested at 28, 91, and 180 days. The samples were soaked in normal and peat water. According to the permeability, porosity, and shrinkage test, the concrete using 30 % steel slag got lower value compared to a normal concrete. Regularly, when the normal concrete is soaked in normal water, the compressive strength risen up at 28, 91, and 180 days. On the other hand, the concrete soaked in peat water gets the compressive strength increased at 28, 91 days, but fell down at 180 days. Based on the compressive strength results, the concrete using 30 % steel slag continued to increase with day, although they were soaked in normal or peat water. SEM test showed that steel slag occupied the void between aggregate and cement paste. It made the void of concrete became denser and got a higher strength. EDS test revealed that the concrete using 30 % steel slag contained pozzolanic material.Keywords : Steel slag, Permeability, Porosity, Shrinkage, Compressive strength, SEM, EDS.
Stabilitas Tanah Plastisitas Rendah Dengan Semen s, Pirmadona; Muhardi, Muhardi; Kurniawandy, Alex
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 2, No 2 (2015): Wisuda Oktober Tahun 2015
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Soil is a material that serves as an support for the basis of a constuction, be it construction of buildings, bridges and roads. Each region has different soil characteristics in other regions, there have bearing capacity is good and some are bad. To overcome this, it is necessary to repair soil with stabilization method. One way of soil stabilization is with cement. In this study, the cement used are OPC cement and PCC cement. This study focuses on the effect of OPC cement content and PCC against the value of CBR and free compressive strength (UCS) of land. Soil samples tested in this study is the low plasticity clay derived from the intersection Inpress km.11 Perawang, Siak. Content variation mixture used is 5%, 10%, 15%, 20% on each of the OPC cement and PCC to do the same curing time for 14 days.The results showed that the increasing levels of mixed cement both OPC cement and cement PCC, then the value of CBR and UCS will be even greater. The maximum increase of UCS value in the soil mix with 20% OPC and 20% PCC, where the value of each are 6.2 MPa and 2.6 MPa. At levels of 10% OPC and 10% PCC, CBR value of each is 369.6% and 189.8%. This indicates that the OPC cement and PCC cement can improve the physical and mechanical properties of clay low plasticity.Keywords: Low plasticity clay, CBR, UCS, OPC, PCC
A Proposal of Seismic Index for Existing Buildings in Indonesia using Pushover Analysis Alex Kurniawandy; Shoji Nakazawa
Journal of Engineering and Technological Sciences Vol. 52 No. 3 (2020)
Publisher : Institute for Research and Community Services, Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/j.eng.technol.sci.2020.52.3.2

Abstract

Indonesia has often suffered major earthquake damage over the past 50 years. There are thousands of buildings in earthquake-prone regions that still need seismic evaluation and rehabilitation. One method of evaluating the seismic performance of an existing building is by assessing it using the Japanese seismic index for structures. A basic seismic index can be calculated based on the strength and ductility criteria. The strength and ductility performance of a structure can be obtained by pushing a building until it reaches its maximum deformation capacity. This paper describes a proposal to obtain a basic seismic index using pushover analysis. Its adjustment to determine a seismic demand index by considering seismic hazard in Indonesia was carried out using the capacity spectrum method. Two existing buildings in Indonesia were evaluated. The evaluation result indicated that both buildings were in safe condition. The proposal of the seismic index method can be useful in determining the performance index of existing structures. The ductility index can also be used to estimate the response modification factor of a structure.
PENGARUH INTRUSI AIR LAUT, AIR GAMBUT, AIR KELAPA, DAN AIR BIASA TERHADAP KUAT TEKAN BETON NORMAL Alex Kurniawandy; Lita Darmayanti; Ucok H Pulungan
Jurnal Sains dan Teknologi Vol 11, No 2 (2012): Jurnal Sains dan Teknologi
Publisher : Fakultas Teknik Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (231.728 KB) | DOI: 10.31258/jst.v11.n2.p%p

Abstract

Kekuatan beton banyak dipengaruhi oleh sifat-sifat bahan pembentuknya seperti air, semen dan agregat. Di samping itusecara khusus beton juga dipengaruhi kondisi lingkungan. Struktur beton yang bersentuhan dengan air laut, air gambut,dan air kelapa berpotensi menimbulkan kerusakan. Untuk pengaruh air kelapa terjadi pada bangunan gedung pasarterutama di blok gedung tempat penjualan kelapa. Tujuan dari penelitian ini adalah untuk mengetahui pengaruhserangan air laut, air gambut dan air kelapa terhadap kuat tekan, rembesan (kekedapan beton), porositas dan absorpsibeton normal. Mutu beton pada penelitian ini yaitu 22,5 MPa. Perendaman dilakukan untuk mempengaruhi betondengan 3 jenis air yaitu air laut, air kelapa, air gambut dan untuk pembanding beton juga direndam dengan air biasa.Perendaman dilakukan pada umur 28, 90 dan 150 hari. Kuat tekan tertinggi terjadi pada perendaman dengan air biasadimana hasilnya 28.2, 37, 40.5 MPa pada umur 28, 90, 150 hari secara berurutan. Sebaliknya, kuat tekan terendahterjadi pada perendaman dengan air kelapa. Nilai absorpsi, porositas dan rembesan berkorelasi dengan tren kuat tekandimana nilai terendah dari absorpsi, porositas dan permeabilitas terjadi pada kuat tekan tertinggi.Kata kunci: beton, durabilitas, absorpsi, porositas, rembesan.
PENGARUH PEMAKAIAN ABU INSINERATOR RUMAH SAKIT TERHADAP KUAT TEKAN, ABSORPSI, POROSITAS, DAN REMBESAN BETON Lita Darmayanti; Alex Kurniawandy; Benny urzikri Rahim
Jurnal Sains dan Teknologi Vol 11, No 2 (2012): Jurnal Sains dan Teknologi
Publisher : Fakultas Teknik Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (215.989 KB) | DOI: 10.31258/jst.v11.n2.p%p

Abstract

Kegiatan rumah sakit tidak terlepas dari masalah limbah,baik yang bersifat medis maupun non medis. Salah satu carapengolahan limbah medis adalah dengan menggunakan pembakaran suhu tinggi yang dilakukan dalam insinerator.Pembakaran suhu tinggi sangat efektif mengurangi volume limbah dan tingkat bahaya limbah medis. Meskipundemikian insinerator tetap menghasilkan abu sisa pembakaran yang jumlahnya makin lama makin meningkat sehinggaberpotensi menimbulkan pencemaran lingkungan. Oleh karena itu diperlukan solusi untuk memanfaatkan abu hasilpembakaran insinerator tersebut. Penelitian ini dilakukan untuk mengkaji pengaruh pemakaian abu insinerator terhadapkuat tekan, porositas, absorpsi, dan rembesan beton. Penelitian dilakukan dengan memanfaatkan abu insinerator rumahsakit untuk mensubtitusi sebagian pasir yang digunakan dalam pembuatan beton. Persentase abu yang digunakan 0%,5%, 10%, 15%, 20%, dan 25% dari berat pasir. Benda uji berbentuk silinder dengan diameter 15 cm dan tinggi 30 cmdigunakan untuk pengujian kuat tekan, absorpsi, dan porositas dibuat sebanyak 60 buah. Untuk pengujian rembesandigunakan sampel berbentuk kubus dengan ukuran 15 cm x 15 cm x 15 cm sebanyak 18 buah. Hasil pengujian kuattekan beton setelah perawatan 28 hari menunjukkan terjadi penurunan seiring dengan meningkatnya persentase abuinsinerator yang digunakan. Nilai kuat tekan tertinggi didapatkan pada pemakaian abu insinerator sebanyak 5% yaitu21,4 MPa. Pada pemakaian abu insinerator dengan persentase 10-25%, kuat tekan yang didapatkan berkisar 6,4-14,3MPa. Penurunan kuat tekan disebabkan pemakaian abu insinerator dapat meningkatkan absorpsi, porositas danrembesan beton, selain itu abu insinerator mempunyai sifat menyerap air yang cukup tinggi.Kata kunci: absorpsi, abu insinerator, beton, kuat tekan,porositas, rembesan.
Pemanfaatan Limbah Botol Plastik Sebagai Bahan Serat Pada Beton Syarif Hidayatullah; Alex Kurniawandy; Ermiyati Ermiyati
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 4, No 1 (2017): Wisuda Februari Tahun 2017
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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This research studied the mechanical properties of concrete are compressive strength, split tensile strength, flexural strength concrete that uses shredded plastic bottles as fiber. The use of this as a fiber chopped aims to reduce plastic bottle waste and improve the mechanical properties of normal concrete. The test object is cylindrical and beams, used variation is the addition of as much as 0.0%, 0.2%, 0.4%, 0.6%, 0.8% and 1.0%. The results showed the highest compressive strength of concrete on the variation of 0.6% IE 9.47% of the sum of normal concrete. For a split tensile strength experienced the highest increase at 0.6% variation in the amount of 39.53% And Strong Bending experienced highest increase in the variation of 0.8% IE 19.44% of the sum of normal concrete. The results showed the addition of Shredded 1-3 mm with a length of 5 cm Plastic Bottles as fibers in concrete mixtures can improve the mechanical properties of concrete, in particular concrete compressive strength, tensile strength of concrete sides, and flexural strength. Keywords: chopped 1-3 mm width 5cm, plastic bottles, compressive strength, tensile strength sides, flexural strength.
Kajian Posisi Shear Wall Pada Gedung Tidak Beraturan Dengan Analisis Riwayat Waktu Beban Gempa Heru Nurcahyo; Reni Suryanita; Alex Kurniawandy
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 1 (2016): Wisuda Februari Tahun 2016
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Irregularity of building structure often emerges due to the room configurations to meet the architectural requirements. In irregular building, eccentricity exists between its center of mass and its center of rotation. The eccentricity generates torsion, which usually leads to the placement of rigid structural elements to increase the rotational stiffness of the building structure. One of the options to increase the building structure stiffness is by placing shear walls in the building. This research aims to analyze the impact of structure irregularity to the eccentricity of building structure and the effectiveness of various shear wall configurations to resist earthquake load. Building to be analyzed is Aulia Hospital buildings with earthquake load time history. Modeling is done with the help of the finite element program. The model will be made to the building without shear wall, existing and modification. The modified model is a model with a different positioning of the existing shear wall based parameter eccentricity. The analysis produced fundamental period and maximum displacement of the building as output. The fundamental period was calculated equal to 3.102 second for the building without shear wall; 2.087 second for the existing building; 2.011 second for Modification 1 Building; and 1.756 second for Modification 2 Building. The maximum displacement in X direction was calculated equal to 246.01 mm for the building without shear wall; 114.1 mm for the existing building; 107.24 mm for Modification 1 Building; and 102.07 mm for Modification 2 Building. Whereas the maximum displacement in Y direction was calculated equal to 230.37 mm for the building without shear wall; 169.7 mm for the existing building; 156.5 mm for Modification 1 Building; and 97.7 mm for Modification 2 Building. Based on the analysis results, it can be concluded that Modification 2 is the most effective model to resist earthquake loading.Keywords: Shear wall, Irregular Building, Eccentricity, Displacement
Evaluasi Kerentanan Bangunan Gedung Terhadap Gempa Bumi Dengan Rapid Visual Screening (RVS) Berdasarkan Femad 154 Rahmatul Firdaus; Alex Kurniawandy; Zulfikar Djauhari
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

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Earthquake is a disaster that could bring a disadvantage on society, either materials or lifes. Although Pekanbaru City is not a city with numerous of earthquakes, but Pekanbaru City had ever felt the impact of the earthquake on September, 2009. The earthquake took place on West Sumatera, was caused by frictions between two plates, which were Eurasia Plate and Indo-Australia Plate. To anticipate a bad impact that would happened by earthquake, therefore it is necessary to evaluate the building`s vulnerability against earthquake by using FEMAP 154. The vulnerability of the each buildings toward earthquake are different. This is based on the non structural components on the buildings which would influenced the evaluation result later. From the research, it shown that the vulnerability of the buildings in some places in Pekanbaru City are quite well. It proved by the building`s vulnerability analysis against earthquake had fulfilled the evaluation of FEMAP 154 Keywords : Earthquake, Vulnerability, FEMAP-154.
Co-Authors Afrianda, Yogi Alfadhella Ridwan Andy Hendri, MT, Andy Ardison Gutama Arie Putra Arita, Deri Arita, Deri Azhari Azhari Azmi Firnanda Benny Hamdi Rhoma Putra Benny urzikri Rahim Biefanza Rama Djauhari, Dzulfikar Edi Yusuf Adiman Emiral Akbara Eral Lidansyah Ermiyanti Ermiyanti Ermiyati Ermiyati Ermiyati Ermiyati, Ermiyati Fachrurrozi Yusyaf Fela, Chrisfela Wulandari Garcya, Muhammad Gala Gussyafri Halim Kasuma Hanif, Ardian Hendra Taufik Heru Nurcahyo Ibnu Munawar Mizam Igeny Dwiana Darmawan Iskandar Romey Sitompul Ismeddyanto, Ismeddiyanto Istighfar, Irfan Jamil, Hafizd Ahmed Juhariadi Juhariadi Kamaldi, Alfian Khairunnas Lita Darmayanti M Edwar Hidayat Mardani Sebayang Muhamad Yusa Muhammad Afdal Syafikri Muhammad Refi Muhammad Rizky Muhammad Shalahuddin Muhardi Muhardi Muhardi Nakazawa, Shoji Novan, Andre Nugraha, Rendi Adi Nur Alfikri Ockto Perry P Harahap Panjaitan, Aprizal R Arianto Rahman, Rezky Rahmatul Firdaus Rahmatul Firdaus, Rahmatul Ramadhan, Rian Randi Yuzti Ramadhan Reni Suryanita Rezky Rendra Rezky Rendra, Rezky Ridwan Ridwan Rizqy Ridho Prakasa Ronaldi Zulkifli s, Pirmadona Shoji Nakazawa Simamora, Idris David Fernando Siswanto Tarigan, Filemon Tengku Tantoni Yahya Trifad Mochd Khaidir, Trifad Mochd Ucok H Pulungan Vasha Hotmaris Parulian Vomania, Vomania Wahyu Setiawan Warman Fatra, Warman Wirma, Rizki Yaren, Rezha Yayi Suryo Prabandari Yonna Rosianda Yose Inanda Yuri Khairizal Zulfikar Djauhari Zulfikar Djauhari Zulfikar Djauhari