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Muhamad Yusa
Jurusan Teknik Sipil, Fakultas Teknik, Universitas Riau, Pekanbaru, Provinsi Riau, Indonesia
Agriculture, Biological Sciences & Forestry Arts Humanities Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering Environmental Science Materials Science & Nanotechnology Mechanical Engineering Transportation

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Studi Eksperimen Pengaruh Gelombang Dan Kecepatan Terhadap Pembentukan Tidal Flat Pantai Gambut Genta Putra Adietama; Sigit Sutikno; Muhamad Yusa
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 7 (2020): Edisi 2 Juli s/d Desember 2020
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Tidal flat forms as the results of sedimentation processes which are mainly influenced by the coastal hydrodynamic. Tidal flat formation on the coastal peat is a unique phenomenon that has  bee occurring at western part of Bengkalis Island, Riau Province, Indonesia. This study aimed to shed light some of aspect of its development. The method used in this research was laboratory test which simulate the tidal flat formation with five different wave variations. Simulations were carried out using coastal peat soil and seawater, collected from Meskom Village, Bengkalis Island, Riau Province, Indonesia. The equipment used in this simulation is a flume with a size of 500 cm x 25 cm x 7.6 cm, a wave generator, and a velocimeter. The results showed that tidal flat only formed as the result of small wave height i.e. 0.01 meters - 0.02 meters and a period between 1.43 seconds - 0.65 second, wave length of 0.149-1.25m and low current speed of 0.094-0.138m/s. Keywords: tidal flat, peat, wave, current
Rancangan Lereng Tambang Batu Bara Terbuka Dengan Metode Probabilistik Frans Rezal; Muhamad Yusa; Gunawan Wibisono
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 8 (2021): Edisi 2 Juli s/d Desember 2021
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Coal was a fossil fuel. The general sense was a combustible sedimentary rock, formed from the deposition of organic matter, primarily the remains of plants and were formed through the process of coalification.One of the coal deposits was in Bangko Tengah Suban Jeriji, Muara Enim Regency, South Sumatra Province. This research examines the design of the mine pit geometry by taking into account safety andeconomic factors with probabilistic methods. The geometry of mining that was used in this design include high levels of 18 meters and a width of berm 29 meters.The result of analysis show slopes for the singleslope 1:0.50 for overburden, interburden, and underburden, 1:0.75 for seam D, and 1:1.00 for seam E. The oveall slope have a depth of 200 meters with an angle of 27o for Highwall and 12o for Lowwall. The Safetyfactor obtained in this design are 2.101 with PoF 0% for Highwall and 3.575 with PoF 0% for Lowwall. There are 4 inter-ramp on this design with safety factor 1.260, 1.569, 3.495, and 3.455. All of inter-ramphave PoF 0%. The value of the stripping ratio of this design is 12.812.Keyword: Single Slope, Overall slope, FK, PoF.
Pengaruh Bentuk Butiran Terhadap Kekuatan Tanah Pasir Frimadofi Frimadofi; Muhamad Yusa; Ferry Fatnanta
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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There are many factors that affect the sands shear strength. One of the most important factors is the shape of the sand grains. The shape of sands in nature varied greatly, from angled to rounded. Natural sands from the river is usually rounded, while the sands from stone crusher is usually angular. The sands that is expected to be rounded in shape comes from the Kampar River and the sands is expected to have an angular shape from Kota Kijang quarry. In this research, the shape of sand grains were captured using a specified smartphone camera. The image then were analyzed using Image-j software. Direct shear test was carried out on various relative density of dry sands (loose and dense condition). Image analysis shows that Kampar’s sand is sub-rounded, while Kijang’s sand is sub-angular. The value of internal friction angle (ϕ) sub-angular sand is 14% greater in dense conditions and 8.7% greater in loose conditions than for sub-rounded sand. The value of internal friction angle (ϕ) is based on relative density (Dr) in dense conditions greater than 6.3% among fellow sub-angular sands. The value of internal friction angle (ϕ) is based on relative density (Dr) in loose conditions greater than 0.5% among fellow sub-rounded sands.Keywords : Sand, the shape of grain, image-j software, relative density (Dr), shear strength, direct shear test.
Analisis Potensi Likuifaksi Berdasarkan Data Cone Penetration Test Dengan Metode Olsen (Studi Kasus: Gedung Kejaksaan Tinggi Riau) Annisa Soraya Hasibuan; Muhamad Yusa; Agus Ika Putra
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 7 (2020): Edisi 2 Juli s/d Desember 2020
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Liquefation is an occurrence triggered by the earthquake that can cause fatal damage. When the earthquake occurs, the soil on location changes in nature from solid to liquid due to massive cyclic load. One of the liquefaction analysis methods is based on the results of the Cone Penetration Test (CPT). In general the analysis is based on the results of electrical CPT (CPTe), however, in Indonesia, it is preferent by using mechanical CPT data (CPTm). This study aims to compare the results of liquefaction analysis namely the Liquefaction Potential Index (LPI) using the Olsen method based on the value of mechanical CPT and converted mechanical CPT. This study is located on the Kejaksaaan Tinggi Riau Building. Based on the results study, that research site has a higher liquefaction potential if analyzed using CPTm data that has been corrected to CPTe. The range of LPIm value compared to LPIe is 0,373 – 0,638 with the category of liquefaction potential “Moderate” to “Very High”. Keywords: Liquefaction, Olsen Method, mechanical sondir, electrical sondir.
Karakteristik Uji Marshall Campuran Laston (Ac-Wc) Dengan Abu Bata Dan Semen Sebagai Bahan Pengisi (Filler) Ary Iqbal; Muhammad Shalahuddin; Muhamad Yusa
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 7 (2020): Edisi 1 Januari s/d Juni 2020
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Housing development has led to increase in the demand for the production of non-structural constituent materials such as bricks. Apart from that the increased production of bricks also creates waste from thebricks themselves such as defective brick. The defect may caused by improper forms, inadequate requirements for combustion and broken stones when transporting locations. This study aims to find theMarshall characteristic value in the asphalt concrete wearing course mixture filler under conditions of optimum asphalt content with used variations of brick ash and portland cement as filler replacement withratio of 0:100, 25:75, 50:50, 75:25 and 100:0. The method used in this study is the experimental method and descriptive analysis. The combination of these two methods identified based on facts obtained during testing and then analyzed based on literature and other supporting data. In the condition of optimum asphaltcontent, all variations meet the Marshall characteristics requirements. The best composition is found in variations of 100:0 (100% brick ash : 0% portland cement) with a stability value of 1280 kg and flow of 3.90mm, with optimum asphalt content of 5.90% and VMA value of 16.00%, VFA 75.00%, VIM 3.95% and MQ 345 kg/mm.Keywords: Brick Ash, Laston AC-WC, Filler
Analisis Kadar Air Perlapisan Tanah Di Lahan Gambut Untuk Menentukan Fire Danger Rating System (FDRS) Muhamad Azizi; Ari Sandhyavitri; Muhamad Yusa
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 7 (2020): Edisi 1 Januari s/d Juni 2020
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Peat is organic soil, but that does not mean organic soil is peat soil. Peatlands in Indonesia are 14.9 million hectares, covering around 50% of the world's tropical peat. Riau Province which has the largest area of peatlands in Indonesia is 55.3%. Unproductive peatlands in Indonesia are reported to be 4.2 million hectares. Under natural conditions, peat is a type of water-saturated soil that can store water up to 5 to 15 times its weight. This research was conducted in the village of Tanjung Leban using peat soil water content of each layer. Results Peat soil moisture content is used to determine the parameters of the Fire Danger Rating System (FDRS) water content. The analysis was conducted using primary data in the form of soil sampling and laboratory testing of soil mechanics. The results of this analysis obtained the value of the average water content of each layer. The average value of layer moisture content is different from the first layer of litter moisture content of 65.39%, the value of moisture content of the second layer of organic soil is 71.22% and the value of moisture content of the third layer of solid soil is 71.04%.Keywords: peat land, Fire Danger Rating System, water content
Stabilisasi Tanah Plastisitas Tinggi Menggunakan Semen Dan Difa Soil Stabilizer Ronny Tigor Sitanggang; Muhamad Yusa; Ferry Fatnanta
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

High plasticity is poor physical and mechanical properties of the soil, so it is deemed not to meet a certain technical properties for bearing a construction. It is usually has a low bearing capacity, high compressibility and high swelling and shrinkage behaviour, where it needs to be stabilized. This study attempted to stabilize high plasticity soils using cement and Difa Soil Stabilizer as addictive material. This study investigated effect of Difa Soil Stabilizer to physical and mechanical properties (UCS test). Difa Soil Stabilizer and cement varied from 0.6%, 0.8%, 1.0%, and 3% and 5% of soil dry weight respectively. UCS test was conducted at optimum water content after 0, 7, and 14 days curing. The results show that Difa Soil Stabilizer could not work optimally without cement. Curing days for soil, cement and Difa Soil Stabilizer increase UCS value. Maximum UCS value (878.7 kPa) was obtained at 14 days of curing for mixture of soil + 5% cement. UCS value for mixture of soil + 3% cement has a lower UCS value (344.4 kPa). For soil, cement and Difa Soil Stabilizer mix, highest UCS value was obtained at 0.6% Difa Soil Stabilizer i.e 720,4 kPa at 14 days of curing with 18.012 % lower than maximum UCS value. Keywords : UCS, Difa Soil Stabilizer, high plasticity, cement, stabilization
Karakteristik Sifat Mekanis Dan Fisik Tanah Lunak Di Kabupaten Rokan Hilir Berdasarkan Pengujian Dokenbo Dan Vane Shear Abdullah Ihsan Alkubuwi; Muhamad Yusa; Ferry Fatnanta
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 8 (2021): Edisi 2 Juli s/d Desember 2021
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Along with the times and the rapid growth of technology created by humans, many ideas and ideas from building experts have emerged to research further about the nature and characteristics of the soil according to their respective types. In accordance with the topic of this research, the type of soil that will be studied further is soft soil. This study aims to determine the statistical relationship between physical characteristics and mechanical characteristics based on the parameter values obtained from dokenbo dan vane shear. In this study, an experiment was conducted to find the characteristics of soft soil in Rokan Hilir Regency using dokenbo and vane shear tools directly in the field, it is hoped that dokenbo dan vane shear have a relationship that can be compared later. Furthermore, the physical properties of the soft soil will be tested in the laboratory in order to determine the property value of the soft soil itself. The test was carried out at 30 points spread over several locations in Rokan Hilir Regency. From this research, the shear strength (Su) of the dominant vane shear is 16-20 kPa, with an overall value range of 4-34 kPa. The dominant dokenbo penetration value range is 301-400 kN/m2, with an overall value range of 158-1430 kN/m2. The dominant dokenbo shear angle value range is 21 o-25 o, with an overall value range of 9-41 o. Based on the correlation results, the penetration value is directly proportional to the Su value, the correlation between penetration and shear angle has a very low relationship, the correlation between penetration and physical properties has a low relationship. Keywords: Soft soil, shear strength, Dokenbo
Stabilisasi Tanah Lempung Organik Menggunakan Semen Dan Difa Soil Stabilizer Abdul Halim Muqorrobin; Muhamad Yusa; Ferry Fatnanta
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 5 (2018): Edisi 2 Juli s/d Desember 2018
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The bearing capacity of clay soils will decrease by the presence of organic materials in that clay soils. Therefore, the usage of additives such as cement and DIFA SS can be an option to improve the strength of this kind of soil. This research aims to analyze the effects of organic content (varying from 3, 6, 9, and 12% by dry weight) to the CBR values of clay, and to analyze the increase of its strength after stabilized using cement and DIFA SS (5% and 1% by dry weight). The organic clay samples were reconstituted in the laboratory by mixing clay and peat soils. CBR tests were conducted after 0, 7, and 14 days of curing period, and after 4 days for soaked specimens. The results indicate that CBR values of mixing clay decreased significantly from 16,89% to 10,39% due to the addition of 3% organic content. After 14 days, the CBR values of cement-stabilized clay resulted in an increase to 141,04% while the CBR values of clay soils with the addition of cement and DIFA SS improved to 97,17%. Furthermore, the higher the quantity of organic content added to the soils, the lower the CBR values of the stabilized soils. From these results, it is concluded that organic content strongly affects the effectiveness of cement and DIFA SS treatment of the soils. Keywords: CBR, Cement, Clay, DIFA SS, Organic Content, Soil Stabilization
Stabilisasi Tanah Cl-Ml Menggunakan Semen Dan Difa Soil Stabilizer Endala Siboro; Muhamad Yusa; Ferry Fatnanta
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 5 (2018): Edisi 2 Juli s/d Desember 2018
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CL-ML (clay with low plasticity, silt with low plasticity) soil is a type of soil with inconsistent property and low bearing capacity caused by changes in water content. Soil stabilization is required to fix its problematic properties. One of the possible method to fix the soil chemically is soil stabilization with cement and DIFA soil stabilizer as additives. DIFA soil stabilizer is a type of addictive ingredient used in soil stabilization and to solidify and stabilize soil physically and chemically. This study aims to analyze the effective content of cement and DIFA soil stabilizer in increasing the compressive strength of the soil and comparing it with the compressive strength of cement-free soil. Cement content variations used were 3% and 5% from the dry weight of the soil and DIFA soil stabilizer content variations used were 0.6%, 0.8%, and 1% from dry weight of the soil. Shear strength tests were done after 0, 7, and 14 days of submersion. The result of this study shows that the compressive strength of the original soil is 127,78 kPa, which increases to 153,46% after the addition of 5% cement. Then in the 14 days curing time, the compressive strength of soil-5% cement is 1684,09 kPa. The highest compressive strength value is 1711,60 kPa which is obtained when the soil is stabilized with 5% cement addition, 0.6% DIFA soil stabilizer, and 14 days of submersion.Keywords: compressive strength, CL-ML, stabilization, DIFA soil stabilizer, cement
Co-Authors Abdul Halim Muqorrobin Abdullah Ihsan Alkubuwi Agus Ika Putra Agus Ika Putra Ananda, Rizki Fajri Annisa Soraya Hasibuan Ari Sandhyavitri Arifan Farhan Ary Iqbal Azizah . Bagus Muhammad Akbar Daniel Irfan Dian Paramita Eka Saputra Eko Soebowo Elianora Elianora Endala Siboro Esther RA Fadli Dirga Subardi Ferry Fatnanta Fitri Herawati Frans Rezal Frimadofi Frimadofi Genta Putra Adietama Gina Khusnul Khotimah Gunawan Wibisono Gunawan Wibisono Gustika, Rani Ardeylina Himmatul Azizah Indradi Wijatmiko Jannika Suhelmi Lisa Trisnawati Lita Darmayanti Muhamad Azizi Muhammad Naufal Muhammad Riyan Sabri Muhammad Shalahuddin Muhammad Shalahuddin Muhammad Taufik Muhardi Oki Chandra Ongko, Andarsin Panji Tegar Aji Rafika Rani Zainuddin Ridho Ilahi Ronny Tigor Sitanggang Ropiska Alfareza Satibi, Syawal Simanjuntak, Lambok Jadiaman Soewignjo Agus Nugroho Sutikno, Sigit Vebrian Anggara Wahyu Frisnel Yoyon Kurniawan