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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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Sifat Mekanis Beton Dengan Menggunakan Steel Slag Sebagai Bahan Subtitusi Agregat Halus Dan Fly Ash Sebagai Bahan Subtitusi Semen Yonna Rosianda; 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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The purpose of research is to identify the mechanical properties of concrete by using steel slag as subtitution for fine aggregates and fly ash as subtitution cement on concrete with the quality (f`c) 25 MPa. The research meant to review the permeability, porosity and load power of concrete. The proportion of steel slag and fly ash which was used is 0% and 20% of total weight of fine aggregates and cements. The permeability and porosity test was done on 28 days soaked concrete. For the pressure test, it was done on 28 days and 56 days soaked in normal water. The result of the test shown that the using of 20% steel slag and 20% fly ash liably improved the permeability and porosity of the concrete. On the normal concrete-pressure test, it was improved as well for 28 and 56 days soaked concrete. Meanwhile, the concrete with steel slag and fly ash as subtitution was also shown an improvement on 28 days and 56 days`s pressure test.Keywords : Steel slag, fly ash, Permeability, Porosity, Compressive strength.
Kuat Tekan Beton Dan Waktu Ikat Semen Portland Komposit (PCC) Azmi Firnanda; Alex Kurniawandy; Ermiyati Ermiyati
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 1, No 1 (2014): Wisuda Februari Tahun 2014
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This research comparison compressive strength and setting time of concrete used Portland Cement Composite (PCC) and Ordinary Portland Cement (OPC). Total of samples are 120 and for each ages are 10. Composition of mixture in this research base on ACI method. The result of the test obtained compressive strength of PCC at the age of 3, 7, 14, 21, 28, and 90 days are 15.65, 21.54,  27.69, 31.37,  31.71 and 37.65 then for OPC are16.99, 22.65, 28.99, 32.27, 32.89, and 38.16. Research showed the age factor of PCC for each ages are 15.65, 21.54, 27.69, 31.37, 31.71, and 37.65 then for OPC are 16.99, 22.65, 28.99, 32.27, 32.89, and 38.16. The value  of age factor OPC and PCC obtained different with the age factor OPC on PB 89 standard. The initial setting time of PCC are 119.17 minute and OPC are 92,99 while the final setting time of PCC are 165 minute and OPC are 150 minute. Keywords: age factor, compressive strength, PCC, OPC, setting time.
Pengaruh Steel Slag Sebagai Bahan Substitusi Pasir Pada Sebagian Sifat Beton Segar Dan Beton Keras Eral Lidansyah; Alex kurniawandy; Ermiyanti Ermiyanti
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 objective of this research is to find the properties of hard and fresh concrete when using steel slag as sand substitution material on concrete with 25 Mpa f’c strength. The research conducted involves the study for workability, chemical resistance, split tension strength and flexural tension strength. The percentage of steel slag used are 0% and 30% of the sand weight. The results of the research show that the 30% slag tend to increase the water required on concrete. Upon the chemical resistance test for, the compression strength increase at 0.37% for concrete aged 7 days and 0.26% for concrete aged 28 days compared to normal concrete. On the split tension strength test for 30% slag substitution the increase on the strength is at 0.44% for concrete aged 7 days and 0.48% for concrete aged 28 days compared to normal concrete. As for flexural strength test, the strength for 30 % slag substitution increase at 0.29% for concrete aged 7 days and 0.11% for concrete aged 28 days compared to normal concrete.Keywords : steel slag, workability, split tension strength, flexural tension strength, chemical resistance.
Pengaruh Kombinasi Fly Ash Dan Bottom Ash Sebagai Bahan Substitusi Pada Campuran Beton Terhadap Sifat Mekanis Tengku Tantoni Yahya; Alex Kurniawandy; Zulfikar Djauhari
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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Fly ash and bottom ash were waste that generated from the power plant burning coal process. Fly ash and bottom ash has the potential to be developed as a basic ingredient in concrete composites. This research aimed to obtain the properties of fresh concrete and hard concrete of the combined effect of fly ash and bottom ash as a substitute ingredient in composite concrete. This research has examined the influence of a combination of waste fly ash and bottom ash to the compressive strength of absorption, porosity, permeability, shrinkage of concrete, setting time of cement. The percentage of fly ash waste and bottom ash waste that used were 15% by weight of cement and 15% of the weight of the sand. Research results show that using of 15% fly ash and 15% bottom ash was tending to decrease the compressive strength of concrete. However, the compressive strength was generated still whitin the standard of concrete strength design. Applicaton of 15% fly ash and 15% bottom ash were experiences to increase the value of absorption, permeability and concrete porosity, but reduce the concrete shrinkage. Meanwhile, setting time of 15% fly ash and 15% bottom ash were faster than without any composite.Keywords : concrete, fly ash, bottom ash, permeability, shrinkage, setting time.
Pengaruh Penambahan Serat Polypropylene Terhadap Sifat Mekanis Beton Normal Yuri Khairizal; Alex Kurniawandy; Alfian Kamaldi
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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This research studies the mechanical properties of polypropylene concrete consist of compressive strength, modulus of elasticity, splitting tensile strength, flexural strength and deflection. Polypropylene fiber is a kind of plastic fiber that specially produced with high technology. Application of this polypropylene fiber aim to improve the mechanical propertiesof normal concrete. The specimens are cylinder and beam shapes. The variety that use is additional of polypropylene fiber at 0,0 kg/m3, 0,2 kg/m3, 0,4 kg/m3, 0,6 kg/m3, 0,8 kg/m3 and 1,0 kg/m3. The result of research shows that highest compressive strength and modulus of elasticity of concrete occurred at 0,4 kg/m3 polypropylene various. Highest splitting tensile strength and flexural strength of concrete occurs at 1,0 kg/m3 polypropylene fiber various. In generally, deflection test shows improvement within addition of polypropylene fiber. According to the result of research, additional polypropylene fiber into concrete mixture can improve the mechanical properties of concrete, especially compressive strength, modulus of elasticity, splitting tensile strength and deflection of concrete.Keyword : polypropylene fiber, mechanical properties, compressive strength, splitting tensile strength, flexural strength
Pengaruh Penambahan Limbah Ekstraksi Buah Kelapa Sawit Terhadap Pembuatan Paving Block Wahyu Setiawan; Alex Kurniawandy; Ermiyati Ermiyati
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 5, No 1 (2018): Wisuda April Tahun 2018
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The waste of palm know as waste of palm oil extraction, which is recently available abundantly. One of efforts in using this waste material is as additive in paving block industry. This research presents the efficiency of waste of palm oil extraction as an additive material of paving block at optimum mix composition regarding the paving block compressive strength, absorption and resistance to chemicals.The composition of waste of palm oil extraction was 0%, 2,5%, 5%, 7,5%, 10% and 12,5% by weight of cement. Research results showed that the use of waste of palm oil extraction as an additive affect the quality of the paving block. The best composition of paving block in this research was the amount of waste of palm oil extraction can be added to paving block as much as 7,5%. It was shown from the value of compressive strength of 7, 14, and 28 days increased to reach 18,3 MPa, water absorption is 5,9%, and resistant to sodium sulfate. Based on SNI 03-0691-1996, paving block generated from this treatment fitted in C quality of paving block and can be used for parking area.Keywords: waste of palm oil extraction, paving block
Studi Eksperimental Variasi Pretension Sambungan Baut Baja Tipe Slip Critical Ardison Gutama; Alex Kurniawandy; Warman Fatra
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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On the bridge connection type found using high strength bolts with the type of slip-critical connections. In the installation of high quality bolt connection types is conducted pretension with using torque wrench or using manual tool by turn of nut. This study aims to determine tensile strength and failure behavior of the critical slip-type connection by varying the value of pretension on single bolt locking connection with different methods. Pretension variation used 90 Tb, 100 Tb and 110 Tb for torque wrench and 2/3, 3/6 and 4/6 rounds for manual tools of pretension respectively.Tensile test performed on each variation and variation locking method. The results showed the tensile strength values at the both locking methods are same and the failure behavior result are the bolt fail in shear and plate changes into an oval shape.Keywords: Pretension, Connection slip critical, high tensile bolt, tensile strength of connection.
Pengruh variasi Bentuk Paving Block terhadap Kuat Tekan Arie Putra; Alex Kurniawandy; Azhari Azhari
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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The purpose of this research is to know the effect of paving block original shape variations and test shape of paving block with SNI standard 03-0691-1996 against compressive strength. Mix design of paving block in this research used proctor methods with cement ratio and fine  aggregate allowed 1 : 2,857. Beam specimen with dimension 20×10×8 cm and cube with dimension 8×8×8 cm and hexagon specimens with lateral side dimension 10 cm and heavy 8 cm and then cube with dimension 8×8×8 cm for testing of compressive strength, while the specimen of beam with dimension 20×10×8 cm and specimen of hexagon with lateral dimension 10 cm and heavy 8 cm for testing of water absorption with total specimen 46 sample. The  testing of compressive strength and water absorption conducted at 28 days. The result of compressive strength value was produced by testing of compressive strength with compression machine and  the test of ultrasonic pulse velocity (UPV) towards specimen of original shape and specimen of cube shape with SNI standard. The result of the research showed that testing result of compression strength with compression machine between original shape of paving block and cube shape with SNI standard there were significant differences. Compressive strength of specimen beam with dimension 20×10×8 cm with cube with dimension 8×8×8 cm and specimen of hexagon with lateral dimension 10 cm and heavy 8 cm and cube with dimension 8×8×8 cm were obtained for each of it 39,58 MPa ; 34,22 MPa ; 53,50 MPa dan 32,89 MPa. The Average of water absorption that was obtained for the beam specimen and hexagon were respectively 2,66 dan 2,62%.   Keywords: paving block, original shape, cube shape, compressive  strength, UPV,  compression machine, water absorption and proctor method.
Pengaruh Penambahan Steel Slag Dan Abu Terbang (Fly Ash) Terhadap Sebagian Sifat Beton Segar Dan Beton Keras Randi Yuzti Ramadhan; 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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This research study explained the effect of the addition of fly ash substitution of cement and steel slag substitution of sand against most properties of fresh concrete and hard concrete. This study aimed to determine the effect of fly ash and steel slag to most properties of fresh concrete and concrete hard to compare the results obtained with normal concrete so it can produce higher levels of tolerance in using a mixture of fly ash and steel slag on concrete. Testing and analysis done is workability, compressive strength, tensile strength, absorption, and porosity variations additions to the concrete normal quality 0% fly ash + 0% steel slag and 10% steel slag + 10% fly ash using portland composit cement with ordinary water immersion for 28 and 56 days. From the research results of mixing 10% steel slag + 10% fly ash in concrete obtained lower results on the testing of compressive strength and tensile strength apart than normal concrete, but the test results are still within the limits of the quality of the plan in order to obtain higher levels of tolerance is 10% , As for testing the absorption and porosity values generated in the concrete mix is higher than normal concrete.Keywords: steel slag, fly ash, workability, compressive strength, tensile strength, absorption, and porosity.
Pengaruh Penambahan Serat Kulit Bambu Terhadap Sifat Mekanik Beton M Edwar Hidayat; Ismeddiyanto Ismeddiyanto; 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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Concrete has significant deficiencies, which have a low tensile strength. The addition of fiber is one alternative to overcome these deficiecies. Bamboo fiber is a natural fiber that is readily available and relatively fast growth. Fiber which mixing with concrete only take the smooth skin. This research studies the mechanical properties of bamboo fiber concrete consist of compressive strength, splitting tensile strength, flexural strength. Addition of fiber is one of alternation for enhance the strength of concrete. The specimens consists of cylindrical specimens with a diameter of 150 mm and a height of 300 mm and a beam with a length of 600 mm, width 150 mm, and a height of 150 mm. The lenght of fiber that used is 2,5 cm with variation of fiber mass 0,2%, 0,4%, 0,6%, 0,8% 1 % of aggregate fraction.The concrete without fiber is make for comparation. Methods of mixing fibers into the concrete mix in a random way after the concrete is mixed evenly. The result of research showed the compressive strenght, splitng tensile strenght and flexural strength maximum in fiber variation 0,6%. According to the result of research, additional bamboo skin fiber into concrete mixture can improve the mechanical properties of concrete and at optimal fiber variation can on 0.6%.Keywords : fiber concrete, bamboo skin, compressive strenght, splitting tensile strength, flexural strength
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