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All Journal MEDIA KOMUNIKASI TEKNIK SIPIL Jurnal Sains dan Teknologi Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Semesta Teknika Proceedings ACES (Annual Civil Engineering Seminar) Jurnal Teknik Journal of Applied Materials and Technology SAINSTEK J-ABDIPAMAS (Jurnal Pengabdian Kepada Masyarakat) Jurnal Teknologi & Rekayasa Sipil Journal of Infrastructure and Construction Technology
Enno Yuniarto
Dept. Of Civil Engineering, Universitas Riau, Pekanbaru, Riau, Indonesia, 28293
Arts Humanities Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Engineering Languange, Linguistic, Communication & Media Library & Information Science Materials Science & Nanotechnology Mechanical Engineering Social Sciences

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Analisis Peningkatan Suhu Pada Kolom Saat Terbakar Menggunakan Lusas V16 Rahmiasari Rahmiasari; Reni Suryanita; Enno Yuniarto
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 5 (2018): Edisi 2 Juli s/d Desember 2018
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Fire is one of the factors causing failure in the reinforce concrete. The surface of the concrete will become black due to significant increase in the temperature. Cracks occur of an imbalance in volume changes exist between cement paste and aggregate. This study aims to analyze the effect of the rate of changes in temperature on the RC during the fire. The method used is to analyze the rate of changes in temperature according to ASTM E- 119 standard. Analysis was conducted by using finite element software, LUSAS v.16. The column specimen used in this study had rectangular ratio of 350 mm × 600 mm with the length of 4000 mm. The amount of longitudinal bars was 10D19, while the yield strength of bars and the concrete strength was 400 MPa and 45 MPa, respectively. The column element burned with a duration of 4 hours. The results showed there was a difference in term of temperature change’s rate between LUSAS v.16 and manual calculation was 3,7%. This research can be used as a reference on designing fireproof buildings so as to prevent building collapse during a fire.Keywords : ASTM E-119, rate of temperature, LUSAS v.16
Pengaruh Variasi Volume Konsentrasi Bakteri Bacillus Subtilis Terhadap Sifat Fisik Beton Fajar Priandoko; Zulfikar Djauhari; Enno Yuniarto
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 2 Juli s/d Desember 2019
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

In general, construction in Indonesia still uses concrete as a building material. It is proven by more than 60% of projects in Indonesia were using concrete as its construction material. Starts from the simplest constructions to the complex technology projects, concrete becomes an inevitable need. Concrete has several advantages and disadvantages. The problem that often occurs in concrete is it can crack either due to physical changes from the concrete itself or external influences. One way to solve this problem is to use the Bacillus Subtilis bacterium as a concrete mixture. This bacterium is capable of repairing cracks in concrete. That is why this research will use BacillusSubtilis bacteria with different variations in volume concentration, it will be 105 cells / 20 ml, 105 cells / 25 ml and 105 cells / 30 ml as much as 25 ml in castings of 0.1 m3. This research will investigate the physical properties of concrete, which are workability, porosity, and shrinkage of concrete. The test objects are cylindrical and soaked in normal water for 28 days and 56 days. The workability test results showed the highest slump value obtained in bacterial concrete with a concentration of 105 cells / 30 ml with a slumpvalue of 12 cm. The lowest porosity values of 28 and 56 days ages were obtained in bacterial concrete concentrations of 105 cells / 20 ml with porosity values of 12.83% and 10.31%, respectively. The concrete bacteria concentration of 105 cells / 20 ml also has the smallest shrinkage value of 0.064 mm. The addition of Bacillus Subtilis bacteria witha concentration of 105 cells / 20 ml was the most optimal of all variations of theconcentration used to the physical properties test of concrete.Keywords: Concrete, Volume Concentration, Bacillus Subtilis, Physical Properties
Pemanfaatan Abu Ampas Tebu Sebagai Bahan Substitusi Semen Terhadap Karakteristik Bata Beton Pejal Afwan Eka Putra; Zulfikar Djauhari; Enno Yuniarto
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 1 Januari s/d Juni 2019
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

The use of bagasse ash in the manufacture of solid concrete bricks is one way of saving in the use of cement. Concrete brick is a type of brick-shaped building material made from the main ingredients of portland cement, water, and aggregates used for wall pairs. The study of the use of bagasse ash aims to determine the effect of bagasse ash on the quality of concrete bricks, namely in terms of compressive strength and water absorption. Comparison of the mass of cement with sand is 1: 4. The method used is to conduct experiments in the laboratory. The results showed that the relationship between compressive strength and concrete brick water absorption was inversely proportional. The greater the compressive strength of the concrete brick, the smaller the absorption value of the water and vice versa. In terms of compressive strength, the maximum value of using bagasse ash to obtain concrete brick of quality level I is the percentage of 22.5% with a compressive strength of 103.077 kg / cm2. The conclusion that can be taken in this study is the use of bagasse ash can reduce cement usage by 30% in the manufacture of concrete bricks. This is evidenced by the results of the quality of concrete bricks obtained still meet the requirements of SNI 03-0349-1989 with a quality level II. Keywords: Solid concrete brick, bagasse ash, compressive strength, water absorption
Sifat Mekanik Beton Dengan Menambah Bakteri Bacillus Subtilis Untuk Aplikasi Beton Pulih Mandiri Nevita Elisa; Zulfikar Djauhari; Enno Yuniarto
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 5 (2018): Edisi 2 Juli s/d Desember 2018
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Concrete is a brittle material and has low tensile strength comparing to other material. When the cracks occur, the quality of concrete will decrease, so the new innovations will be created to cover the weakness of concrete. The innovation is self healing concrete that uses bacteria as a medium that can close the cracks of concrete. This research used 25 ml bacillus subtilis with a concentration of 105 cells/ml as admixture to the concrete mix. The test conducted in this research was compressive and flexural tests carried out at the age of 28 dan 56 days. The test consists of two types of loading namely crushing crack test where the concrete cylinder was loaded until it failed and initial crack test when the concrete cylinder was loaded until first crack appeared. For the case of conducted crushing crack bacterial concrete were able to increase compressive strength of 14.71% and flexural strength of 6.96% compared to those of normal concrete at the age of 56 days. Furthermore, initial crack test conducted at bacterial concrete was able to withstand compressive and flexural loads of 17.15% and 3.17% higher than those of normal concrete. Keywords: concrete, crack, bacillus subtilis, compressive strength, flexural strength
Pengaruh Variasi Volume Pengenceran Bakteri Bacillus Subtilis Terhadap Sifat Fisik Beton Pada Lingkungan Sulfat Suziela Saila; Zulfikar Djauhari; Enno Yuniarto
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 2 Juli s/d Desember 2019
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Concrete is a material that generally becomes a necessity as a support for infrastructure. Concrete has various advantages so it is chosen in the field of construction. During the construction, several weakness were found w in concrete that can make cracks and cause performance in concrete being decreased. To overcome this issue, cracks on concrete can be self-recovered, called self healing concrete. In this study, bacteria Baciluus Subtilis was used as a medium that can restore cracks in concrete. In this study, ingredients added with bacillus subtilis bacteria with a concentration of 105 cells / 20 ml, 105 cells / 25 ml, and 105 cells / 30 ml of 25 ml in each casting were then treated in sulfate solution and studied physical properties. Normal concrete is compared with bacterial concrete with different concentrations at 28 and 56 days of treatment in water sulphate. . Concrete testing performed is workability, porosity, and shrinkage. The results of this study indicate that the slump in sulfur bacteria 105 cells / 20 ml is 9.50 cm, porosity in the concrete bacteria sulfate 105 cells / 20 ml is lower than the other types of concrete with a value of 13.54%. Shrinkage on concrete sulfate bacteria 105 cells / 20 ml is lower than other types of concrete with shrinkage of 0.071 mm or 71 μm. So that it can be concluded that the bacterial sulfate 105 cells / 20 ml concrete is the most optimum with added bacterial ingredients in the sulfate environment.Keywords: Concrete, Bacillus subtilis bacteria, physical properties, sulfate, concentration
Sifat Fisik Beton Pulih Mandiri Dengan Memanfaatkan Bakteri Bacillus Subtilis Widika Arfa A; Zulfikar Djauhari; Enno Yuniarto
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 5 (2018): Edisi 2 Juli s/d Desember 2018
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

As the technology evolves, the utilization of micro-organisms such as bacteria has been developed and used as concrete mixtures. This was inspired by the ability of the bacteria which is able to repair the cracks on concrete, as known as self healing concrete. Therefore, properties of self healing concrete needs to be reviewed. This research used bacillus subtilis chemical solution with amount of 25 ml and with the concentration of 105 cells/ml. Research methodology consisted of adding bacteria solution on concrete mixtures. Cylinder compressive tests were initiated on normal concrete and bacterial concrete on age of 28 days and 56 days. Physical property of concrete was evaluated according to its workability, porosity, and shrinkage rate. The results showed that the slump on bacterial concrete was 80 mm. This indicated bacterial concrete had lower consistency than normal concrete. Porosity results on bacterial concrete was better with deviation of 11,241% compared to normal concrete on age of 28 days and low rate of shrinkage, i.e. 61,50 µm. Hence, it could be concluded that physical properties of self healing concrete is better than normal concrete.Keywords : bacillus subtilis bacteria, self-healing concrete, physical properties ofconcrete
Sifat Fisik Beton Dengan Bahan Tambah Bakteri Bacillus Subtilis Pada Lingkungan Sulfat Kurnia Desmilestari; Zulfikar Djauhari; Enno Yuniarto
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 5 (2018): Edisi 2 Juli s/d Desember 2018
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Concrete is a common material used in structures, such as foundations, roads, and bridges. Concrete has a high compressive strength, but the tensile strength of the concrete is low. At the time the tensile strength limit of concrete is reached, the crack will exist on the tension side of the concrete. The use of bacteria as an added ingredient in concrete is an innovation to reduce the crack. According to Pangeran and Karolina’s research (2017), the addition of bacteria to the concrete can also increase the compressive strength of the concrete. In this research, a 25 ml of Bacillus subtilis solution with the concentration of 105 CFU/ml were added to a concrete mixture. The concrete was soaked in normal water and sulfate solution with the concentration of 150 ppm and the physical properties were examined such as workability, porosity, and shrinkage. There were 3 variations in the specimens, namely normal concrete (BN), bacterial concrete (BB), and bacterial concrete soaked in sulfate solution (BBS). Theresults of this study indicated that slump on specimen BBS was 8.05% and 18.98% higher than specimen BN and BB, respectively. The porosity on specimen BBS was 11.07% and 14.47% higher than specimen BN and BB, respectively. Lastly, the shrinkage on specimen BBS was 1.42% and 18.54% higher than specimen BN and BB, respectively. So it can be concluded that bacteria does have a good effect on the physical properties and soaking the bacterial concrete on the sulfate can adversely affect the physical properties of concrete.Keywords : concrete, bacillus subtilis bacteria, sulfate, physical properties
Potensi Jaringan Saraf Tiruan Backpropagation Dalam Memprediksi Respon Sistem Multi Degree Of Freedom Akibat Pembebanan Dinamik Puri Awanda Cantikawati; Reni Suryanita; Enno Yuniarto
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

One of the simplification model of structure in the structural dynamic engineering was converting the model of a structure into the system that has mass, stiffness, damping percentageand number of Degree of Freedom (DOF) whether in single number (Single Degree of Freedom) or multi number (Multi Degree of Freedom) as its components. Yet the application of model SDOF system was used as fundamental analysis and had to be developed for MDOF system. The research of MDOF system had become necessity to be continuously done in order to improve the previous existing analysis method. One of the method that potentially can be used was with Artificial Neural Network (ANN). Thus why this research was aimed to identify the capability of ANN in predicting the system responses. The analysis of system with 4, 6 and 8 DOFs that was subjected to dynamic excitation such as sinusoidal, triangular, rectangular and ramp load was done with Newmark-β method listing program of FORTRAN. Then analysis continued with Backpropagation Neural Network (BP-NN) using MATLAB program. The input data for BP-NN were heights (H), mass, stiffness, damping value, natural period (Tn) and dynamic load factor (DLF) with system responses as target data. The result had shown that variation of dynamic loads and system parameter had affected the value of system responses. While BP-NN training result showed its ability in predicting the system responses was decreasing from displacement to velocity and acceleration. It could be seen within the degradation value of regression (R) from 0.99-0.84, the increase of Mean Squared Error (MSE) from 1.19×10-7-0.7654 and error percentage from 5%-41%. Therefore ANN method was not capable to be used in predicting the responses of MDOF system under dynamic loads.Keywords: MDOF system, dynamic load, Backpropagation Neural Network, Newmark-β, displacement, velocity, acceleration
Sifat Fisik Dan Mekanik Mortar Dengan Penambahan Bakteri Bacillus Subtilis Dian Nanda Islami; Zulfikar Djauhari; Enno Yuniarto
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 8 (2021): Edisi 1 Januari s/d Juni 2021
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

The development of construction technology has progressed quite rapidly, especially in the field of building materials. One form of technological advancement in building materials which has been developing until now is mortar. Mortar is a mixture of cement, fine aggregate, water and stirred until homogeneous. This study used Bacillus Subtilis as an added ingredient by examining it’s physical and mechanical properties, as well as an innovation in crack recovery in mortars using bacteria called self healing Mortar. Tests were carried out on normal mortar and bacterial mortar aged 28 and 56 days. The physical properties of the mortar tested were porosity, sorptivity and unit weight, while the mechanical properties tested were compressive strength. The results showed that the porosity value of bacterial mortality was smaller than that of normal mortality at 28 days and 56 days with a value of 12.53% and 11.8%. The results of the bacterial mortar unit weight test showed a greater value than normal mortar at the age of 28 days and 56 days with a value of 2.12 gr / cm3 and 2.184 gr / cm3. The soprtivity test results showed that the value of sorptivity mortar bacteria was lower at the age of 28 days and 56 days compared to normal sorptivity mortar with values of 0.1092 mm / min0.5 and 0.0861 mm / min0.5. The compressive strength test results showed that the compressive strength value of bacterial mortar was greater than normal mortar at the age of 28 days and 56 days with values of 20.94 MPa and 21.61 MPa. Based on these data, it can be concluded that the mortar with the addition of bacillus subtilis bacteria is better than normal mortar. Keyword : Mortar, Bacillus Subtilis, Physical Properties, Mechanical Properties, Self Healing
Aplikasi Backpropagation Neural Network (BPNN) Dalam Memprediksi Respon Sistem Rangka Baja Bertingkat Berdasarkan Spektra Gempa Indonesia Ismail Rahmadtulloh; Reni Suryanita; Enno Yuniarto
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 4, No 2 (2017): Wisuda Oktober Tahun 2017
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The planning of multi-story steel portal frame needs to watch for the resulted structure response due to the planning of earthquake-resistant building is needed in the earthquake-vulnerable area such as Indonesia. One of the method used to predict structure response of multi-story steel portal frame is Artificial Neural Network (ANN). The structure used to get the structure response is 10-story steel portal frame, modeled with the help of a element software and earthquake spectrum response analysis method according to SNI 1726-2012. Analyzing is conducted on each capital city of the 34 provinces with 3 different soil types, resulting in 102 data sets. It is therefore concluded that biggest values of movement response and structure velocity are, respectively, 0,0497 m and 0,0292 m/s in the city of Palu, and then the biggest value of structure acceleration is 2,15932 m/s2 on Palu. The accuracy level reaches 99% with 816 training data sets and Mean-Squared Errors (MSE) value is 0,00485. Therefore, it is concluded that ANN can predict multi-story steel portal frame response on all capital cities in Indonesia.Keyword : Multi-story steel portal frame, structure response, Artificial Neural Network
Co-Authors Afisha, Elly Afisha, Elly Afwan Eka Putra Agus Ika Putra Andy Hendri, MT, Andy Ardiansyah, Ridho Arisman Adnan Arrahman, Feri Dian Nanda Islami Fajar Priandoko Fitrana, Yaniarto Hendra Jingga, Hendra Hifzil Hanif Iskandar Romey Sitompul Ismail Rahmadtulloh Ismeddyanto, Ismeddiyanto Jemaa, Yaser K Khairat Kamaldi, Alfian Khairat, K Kurnia Desmilestari Kurniawan, Fahmuji Leo Sentosa Lili Purwati Maharani Miranda Mohammad Saeri Muhammad Akbar Muttaqin Muhammad Anwar Muhammad Saeri, Muhammad Nevita Elisa Puri Awanda Cantikawati Rahmiasari Rahmiasari Reni Suryanita Ridwan Ridwan Ridwan, Ridwan S. Siswanto S. Siswanto Satibi, Syawal Soewignjo Agus Nugroho Suziela Saila Syamsu Herman Syamsu Herman Widika Arfa A Zulfikar Djauhari Zulfikar Djauhari