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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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Pengaruh Penambahan Steel Fibre Terhadap Sifat Mekanis Beton Normal Fachrurrozi Yusyaf; 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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Abstract

Many technology innovations have been created to meet development needed. A lot of research have conducted to find solution to improve the deficiency of concrete. The addition of fiber was an alternative to improve the mechanical properties of normal concrete. In this research, the concrete will be mixed with steel fiber and the examination of the mechanical properties are compressive strength, split tensile strength, and flexural strength. The length of steel fiber was 140 mm which the content variation were 0.2%, 0.4%, 0.6%, 0.8%, and 1% of the weight aggregate volume. The results showed that the compressive strength, the split tensile strength and the flexural strength have the highest value at 0.6%. Therefore, the addition of steel fibers into the concrete mix can improve the mechanical properties of concrete.Keyword : steel fiber, fiber-reinforced concrete, compressive strength, splitting tensile strength, flexural strength
Perbandingan Kinerja Pilar Jembatan Menggunakan Metode Direct Displacement Based Design Dan Capacity Spectrum Method Ockto Perry P Harahap; Zulfikar Djauhari; Alex Kurniawandy
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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The structure usually design base on the elastic analysis that would be multiplied by load factor to simulate the ultimate condition. Actually the behavior of building subject to seismic load are in-elastic. Evaluation to assess inelastic condition of the building during the earthquake are required to obtain assurance that a satisfactory performance . Analysis and performance evaluation can be done with the concept of performance-based seismic design. In this study, there are two performance-based analytical methods used, the method of Direct Displacement-Based Design (DDBD) and Capacity Spectrum Method (CSM). Structures analyzed in this research are the bridge pier with seismic load plan by RSNI 2833:201X. Value of displacement, base shear force, effective time, and damping produced by the method DDBD will be compared with the CSM. Result of analysis by the method of DDBD is the greatest displacement target, that is 0.7304 m, while the displacement by the method of CSM is 0,027 m. Base shear forces (V), results of DDBD, have 265.98 kN smaller than the CSM. However, the effective damping (ξeff) and effective time (Teff), the results of the analysis DDBD, have greater value when compared with the results of the analysis of CSM. Performance evaluation pier structures with DDBD method shows the structures are at the level of that exceed the limit structure stability which indicate that the structure stability has huge risk to collapse in an earthquake. In CSM Method, pillar structure is in Operational category which indicates that there was no structural and non-structure damage on piers when earthquake happened.Keyword : Earthquake, pier structure, Direct Displacement-Based Design, Capacity Spectrum Method, performance
Pengaruh Penambahan Limbah Ekstraksi Buah Kelapa Sawit Terhadap Pembuatan Beton Halim Kasuma; Alex Kurniawandy; Ermiyati Ermiyati
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 5, No 1 (2018): Wisuda April Tahun 2018
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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The purpose of this research is to utilize the waste of palm oil with investigating the mechanical properties. The waste materials are the result of palm oil extraction. The experiment conducted to investigate the effect of this material over compressive strength, absorption, porosity, and setting time. The content of palm oil waste which added to normal concrete are varieties which are 0%, 2%, 4%, 6%, 8% and 10% of the weight of cement. The porosity test, absorption test and compressive test were performed at ages 7, 14 and 28 days for each test while curing with ordinary water. The results showed that the content of palm oil waste 2%, 4% and 6% decrease the compressive strength. Otherwise the addition of 8% and 10% increase the compressive strength. The absorption and porosity test value increase along with increase the content of palm oil using. The setting time with adding of palm oil waste is faster, rather than normal concrete. In conclusion, utilization of the waste of palm oil for concrete mixture can be done.Keyword: Concrete, Waste of Palm Oil, Extraction, Compressive strength, Porosity, Setting time
Behaviours Of Fiber Concrete Mechanic Using Polypropylene Nur Alfikri; Alex Kurniawandy; Alfian Kamaldi
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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This research studies the mechanical properties of polypropylene concrete such as compressive strength, modulus of elasticity, splitting tensile strength, flexural strength and ultrasonic pulse velocity (UPV). Application of polypropylene fiber aims to improve the mechanical properties of normal concrete. The specimens were cylinder and beam shapes. The variations of polypropylene fiber used were 0,0 kg/m3, 1,2 kg/m3, 1,4 kg/m3, 1,6 kg/m3, 1,8 kg/m3 and 2,0 kg/m3. The result of research shows the highest compressive strength, modulus of elasticity, flexural strength and UPV occurred at 1,4 kg/m3 addition of polypropylene whereas. The highest splitting tensile strength was occured at 2,0 kg/m3 polypropylene fiber addition. According to the result, additional polypropylene fiber can improve the mechanical properties of concrete, especially compressive strength, modulus ofelasticity, splitting tensile strength and UPV of concrete.Keyword : polypropylene fiber, mechanical properties, compressive strength, splitting tensile strength, UPV
Kinerja Struktur Akibat Beban Gempa Dengan Metode Respon Spektrum Dan Time History (Studi Kasus : Hotel Ska Pekanbaru) Rezky Rendra; Alex Kurniawandy; Zulfikar Djauhari
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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Earthquake is a natural disaster that is very difficult to predict, the occurrence is relatively short, but the impact can be very dangerous. Earthquake resistant building design must be implemented in the design of a building. dynamic analysis is necessary to determine structure behavior . In this study, there are two dynamic methods used, they are response spectrum method and time history method. Structures analyzed in this study were Hotel SKA Pekanbaru Building. This study examines the performance of the structure consist of story shear, displacement and story drift when receiving seismic load. spectrum response used is pekanbaru city spectrum response by SNI 1726-2012 while the time history used in this study is the time history of El-centro Earthquake, Mentawai Earthquake Aceh , Earthquake and Padang earthquake. response spectrum method Analysis produce Damage Control (DC) performance level in X direction and Y direction. time history of El-centro earthquake analysis produce Structural Stability (SS) performance level in X direction and Y direction. time history of Mentawai Earthquake analysis produce Immediate Occupancy (IO) performance level in X direction and Y direction. time history of Aceh Earthquake analysis produce Damage Control (DC) performance level in X direction and Y direction . time history of Padang Earthquake analysis produce Structural Stability (SS) performance level in X direction and Y direction.Keyword: Response Spectrum, Time History, Performance Level, Dynamic Analysis
Pengaruh Variasi Suhu Dan Durasi Pembakaran Terhadap Kuat Tekan Beton Pasca Bakar Juhariadi Juhariadi; Andre Novan; Alex Kurniawandy
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 2, No 1 (2015): Wisuda Februari Tahun 2015
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

The significant change of temperature as in the event of fire will have an impact on concrete structures, cracked at the surface of structure, damage / collapse, and discoloration. This research was carried out on samples of concrete cubes K350 with the size of 15 cm x 15 cm x 15 cm. Combustion also was carried out at 600 °C, 800 °C, and 1000 °C temperatures with holding time for 0.5 , 1 , 1.5 , dan 2 hours. The cooling process is done by allowed to stand for 24 hours at room temperature. The test results were obtained at the temperature of at 600 °C, 800 °C, and 1000 °C compressive strength decreased by 6.26%-26.30%, 11.99%-34.53%, and 23.08%-66.37. This research shows that the highest of temperatures gives a greater impact on reduction of concrete compressive strength and the concrete surface, compared with the increase of combustion duration. Through this research regression give equations that can be used to calculate the residual compressive strength of the other combution temperatures. Keywords : fire, compressive strength, porosity, temperature, duration
Pengaruh Penambahan Limbah Sisa Penyaringan Minyak Kelapa Sawit Sebagai Bahan Tambah Terhadap Kuat Tekan Dan Kuat Lentur Beton Muhammad Gala Garcya; Zulfikar Djauhari; Alex Kurniawandy
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 5, No 1 (2018): Wisuda April Tahun 2018
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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The research aims to obtain the characteristic of concrete using Spent Bleaching Earth (SBE) as substitute material on normal concrete. It is focused on compressive strength, setting time, and flexure strength. The percentage of SBE it used are 0%, 2%, and 4% of the cement weight. The result show SBE is not suitable to be a cement replacement because it show the decrease of compressive and flexure strength. But the setting time on SBE is slower than 0% SBE substitution and need more time to harden than normal concrete.Keywords : Spent Bleaching Earth, setting time, compressive strength, flexure strength
Evaluasi Rangka Beton Bertulang Dengan Dinding Geser Menggunakan Fema 310 (Studi Kasus Pada : Gedung Menara Dang Merdu Bank Riau) Muhammad Rizky; Alex Kurniawandy; Zulfikar Djauhari
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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The earthquake is a natural disaster that is very difficult to predict the time and location of occurrence. A relatively short process very inversely proportional to the impact. Planning for building must be considered for anticipated damage that will occur as a result of an earthquake. This study aims to conduct a thorough evaluation of the performance of the structure of the Building Dang Merdu Tower of Bank Riau against earthquake hazards by using the FEMA 310 document. The evaluation was conducted on the evaluation of the first phase of the checklist method FEMA 310, the second phase of evaluation with linear static methods and evaluation of the third phase of the method static nonlinear (pushover). Based on FEMA checklist Building Dang Merdu Tower of Bank Riau does not meet the requirements at the soft story investigation. Stiffness of the first level of less than 70% on the stiffness of the second level. Based on a linear static analysis for equivalent static earthquake load story drift value does not meet the requirements story drift permit SNI 1726-2012 while the earthquake response spectrum meet the requirements. Based on the pushover analysis level of the performance Building Dang Merdu Tower of Bank Riau is O (Operational) on ATC-40.Keywords: FEMA 310, linear static, pushover, performance of the structure, inelastic drift
Kuat Tekan Beton Dan Waktu Ikat Semen Portland Pozzolan R Arianto; Alex Kurniawandy; 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

Concrete material applied widely as a building material. Development of building construction encourage cement industri to create new types of products. One of types is Portland Pozzolan Cement (PPC). This study aims to determine value of setting time, compressive strength and age factors base on cement variations using Portland Pozzolan Cement  and Portland Type 1 cement. Specimens are made in cylindrical shape with diameter 15 cm and high 30 cm. Testing of these specimens are conducted in age 3, 7, 14, 21, 28 and 90 days which are 10 samples per each variations. Mix composition of concrete is designed by ACI method with compression target in 25 MPa. Result of experiments, initial setting time is 92.99 minutes and final setting time is 150 minutes for cement Type 1, whereas cement PPC shows initial setting time is 121.38 minutes and final setting time is 180 minutes. The averages of compressive strength are 16.99, 22.65, 28.99, 32.89, 38.16 in age 3, 7, 14, 21, 28, 90 respectively for cement Type 1. On the other sides, for cement PPC, the averages are 16.56, 19.28, 25.79, 24.63, 24.66, 30.35 respectively with age. The age factors of Type 1 cement are 0.516, 0.688, 0.881, 0.981, 1.000, 1.160, and the age factor for PPC cement are 0.672, 0.782, 1.046, 0.999, 1.000 and 1,231.  Key word: age factor, compressive strength, PPC, setting time.
PERILAKU MEKANIK BETON MUTU TINGGI DENGAN MENGGUNAKAN SILICA FUME SEBAGAI BAHAN TAMBAH Alex Kurniawandy; Zulfikar Djauhari; Muhammad Refi
Jurnal APTEK Vol. 3 No. 1 (2011): APLIKASI TEKNOLOGI
Publisher : Universitas Pasir Pengaraian

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (280.563 KB) | DOI: 10.30606/aptk.v3i1.21

Abstract

The purpose of this study was to assess the effect of adding silica fume in high strength concrete mix to the mechanical behavior of concrete through the study of compressive strength, elastic modulus, shrinkage and also an analysis of Scanning Electronic Microscope (SEM). Supeplasticizer mixture composition used in this study is 1% for all the variations and the use of silica fume with a variation of 0%, 5%, 10%, 15%, and 20% by weight of cement. The specimens used were cylindrical with a diameter of 150 mm and height 300 mm, 40 sampel.Mutu concrete planned more than 40 MPa were tested at 28 days with the first treatment before testing. The results showed that the highest compressive strength of concrete contained in a mixture of silica fume concrete with the use of 5% that of 43 MPa. Concrete splitting tensile strength value of the highest obtained in this study is a variation of 5% silica fume which is 3.64 MPa. Elastic modulus on the use of silica fume 5% nerupakan largest value is 3.5944 x 104 MPa.
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