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All Journal International Journal of Applied Power Engineering (IJAPE) PROSIDING SEMINAR NASIONAL Tadulako Journal Sport Sciences And Physical Education Jurnal Rekayasa Jurnal Rekayasa Sipil dan Desain DINAMIKA Jurnal Ilmiah Teknik Mesin REFLEKSI EDUKATIKA Terampil : Jurnal Pendidikan dan Pembelajaran Dasar UNM Geographic Journal Jurnal Environmental Science Civil and Environmental Science Journal (CIVENSE) Islamic Management: Jurnal Manajemen Pendidikan Islam IKRA-ITH ABDIMAS Holistika : Jurnal Ilmiah PGSD Jurnal Teknodik Edukids: Jurnal Pertumbuhan, Perkembangan, dan Pendidikan Anak Usia Dini JURNAL PENDIDIKAN, SAINS DAN TEKNOLOGI Al'adzkiya International of Education and Sosial (AIoES) Journal juremi: jurnal riset ekonomi Jurnal Ranah Publik Indonesia Kontemporer (Rapik) Pedagogy : Jurnal Pendidikan Matematika PENANOMICS: INTERNATIONAL JOURNAL OF ECONOMICS Seminar Nasional Insinyur Profesional (SNIP) JPNM : Jurnal Pustaka Nusantara Multidisiplin AN-NAS: Jurnal Pengabdian Masyarakat Jurnal Papeda: Jurnal Publikasi Pendidikan Dasar
Iswan Iswan
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Religion Humanities Astronomy Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Social Sciences Other

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Analisa Kegagalan Struktur Lereng Tanah Pada Jalur Ganda Dengan Menggunakan Analisis Komputasi (Studi Kasus : Sta 208 + 00 Doeble Track Kereta Api Martapura- Baturaja) Rio Dwi Septian; Iswan Iswan; Ahmad Zakaria
Jurnal Rekayasa Sipil dan Desain Vol 7, No 2 (2019): Edisi Juni 2019
Publisher : Jurnal Rekayasa Sipil dan Desain

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The safety level of a slope is influenced by several factors, including factors tilt and loads working on it. Slope conditions with large loads and steep slopes can cause landslides. The influence of heavy rain flushed the majority of the region martapura - baturaja cause landslides and slope at some point in double track train along 50m which have geographic condition consists of the land pile of high steep, so prone to landslides. This is certainly very dangerous for trains, and around the slopes a solution is needed that can be an alternative to make the slope safe from landslide hazards. Based on the laboratory tests that have been carried out of the samples were taken from the site, so the analysis of the existing slopes stability with computer analysis shows the condition of unstable because from the result of numerical safety value analysis 1,731 for condition 1 and 1,732 for condition 2, so that needed reinforcement on the slopes itself. From the analysis of the slopes stability which has been strengthened with a combination of retaining Wall of land and drill pile using the Computer Analysis obtained greater numerical safety value compared by only reinforced with retaining Wall land for 3,978 to condition 1 and 3,983 to condition 2, so the design of strengthening is safe and able to withstand landslide. Keyword : Borehole Data, Geoelectric, Computer Analysis using methods Fellenius
Korelasi Kuat Tekan dengan Kuat Geser pada Tanah Lempung yang Didistribusi dengan Variasi Campuran Pasir Albertus Willy Pratama; Iswan Iswan; Muhammad Jafri
Jurnal Rekayasa Sipil dan Desain Vol 3, No 1 (2015): Edisi Maret 2015
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This research aims to determine the compressive strength and shear strength on clay which issubstituted with a mixture of sand variations. Soil tested in this study is derived from clay ofBelimbing Sari Village, Jabung District, East Lampung. This is done because if you set up astructure on top of the clay will cause some problems, among others, the small value ofcompressive strength and shear strength of the soil.To determine the effect of mixing clay with sand on the compressive strength and shear strength, itis done by varying the mixing of sand by 10%, 20%, 30%, 40%. From the test results it is obtainedthat the increase in shear strength to a maximum of 0.7534 kg / cm2 and a decrease in cohesionvalue of 0.10 kg / cm2 at mixing the sand as much as 40%. In the compressive strength reaches amaximum value at 30% of the mixing done 4 variation is equal to 0.4996 kg / cm3. The greater thelevel of sand were added then the lesser the value of the soil cohesion, friction angle and thecompressive strength will increase although the maximum compressive strength value in mixing30% sand.Keywords : Clay, Sand, Soil Compressive Strength, Soil Strength Press
Hubungan Batas Cair dan Plastisitas Indeks Tanah Lempung yang Disubstitusi Pasir Terhadap Nilai Kohesi Tanah pada Uji Direct Shear Taufik Ramadhani; Iswan Iswan; Muhammad Jafri
Jurnal Rekayasa Sipil dan Desain Vol 3, No 2 (2015): Edisi Juni 2015
Publisher : Jurnal Rekayasa Sipil dan Desain

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Abstract

The Clay has a low shear force properties, large density, small permeability coefficient and has alow bearing capacity. To increase the bearing capacity of the clay can be used a mixture of sand.In this study, the test is done by using the Direct Shear test, which will be a reference in relation ofliquid limit and plasticity index to the value of cohesion (c) of each soil sample that has beensubstituted with sand.Soil samples used an original soil samples and disturbed soil of clay that comes from threelocations: the area Margakaya Jati Agung South Lampung, Palputih Karang Anyar SouthLampung , and Belimbing Sari Jabung East Lampung. Clay will be mixed with sand No.40 sieve(0.43 mm) in accordance with the required percentage of the variation in sand content of 0%, 5%,10%, and 15%.Based on AASHTO classification system, the three of soil include to the class of ordinary clay soilup to bad as subgrade material. The addition of sand mixture into three types of clay causingdecreased shear strength. The greater the addition of sand content, then the value of cohesion (c),liquid limit and plasticity index of the soil will decrease and shear angle will increase.Keywords : shear strength, Atterberg limits, Clay, Sand .
Studi Analisis Penurunan Tanah Lempung Lunak dan Tanah Lempung Organik Menggunakan Pemodelan Matras Beton Bambu Nawawi Nawawi; Lusmeilia Afriani; Iswan Iswan
Jurnal Rekayasa Sipil dan Desain Vol 5, No 3 (2017): Edisi September 2017
Publisher : Jurnal Rekayasa Sipil dan Desain

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Abstract

The strength of infrastructure buildings is influenced by the type of soil underneath. One type of land that is widely found in the land in the province of Lampung is fine-grained soil. The fine grained soil is meant soft clay and organic clay. Construction of the above clay will experience significant land subsidence constraints when given the loading. The load that causes the pore water pressure increases so that the pore water out and soil decreases consolidatively. Therefore, it is necessary to study soil degradation using box test and bamboo concrete mats as a means of land degradation. The result of clay decline testing using boks modeling and bamboo concrete mat, soft clay experience faster rate of process of decline (Cv) than organic clay. The magnitude of soft clay (Cc) decline is less than that of organic clay. Soft clay volumes are also changing volume (Mv) faster than organic clay. Coeficient of compression(av) of soft clay is also faster than organic clay. The total decline in total soil over a 20 year period on soft clay is smaller than that of organic clay. Keywords : Clay, Test Box, Bamboo Concrete Mattress, Soil Consolidation
THE INFLUENCE OF THE ADDITION OF RICE HUSK ADDITIVES AND MATOS TO THE VALUE OF CBR (CALIFORNIA BEARING RATIO) OF CLAY SOIL IN TERMS OF CURING TIME Sindu Abadi Sampurna; Iswan Iswan; Ahmad Zakaria
Jurnal Rekayasa Sipil dan Desain Vol 5, No 2 (2017): Edisi Juni 2017
Publisher : Jurnal Rekayasa Sipil dan Desain

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Abstract

Soils have different types and different carrying capacity. One of them is clay soil that has the low carrying capacity. Viewed from the rapid development of infrastructure in Indonesia, does not rule out the possibility that the infrastructure built in areas with clay soil types. Given the small carrying capacity of the clay, the soil should be improved in order to support the development of a construction.soil improvement with an additional mixture of rice husk ash and matos as stabilizer can improve soil quality. This research was conducted with rice husk ash mixture of 6%, 8%, 10%, and 12% and matos with level 3,3898% gr. Then, curing for 7 days, 14 days, 21 days, and 28 days without immersion. Soil that used in research is from Sidomulyo, South Lampung is a type of clay soil that belongs to the A-7-5 group based on the AASTHO classification. Research in laboratory showed that 28 days of curing with 12% rice husk ash mixture had the highest CBR value from other curing durations. Soil clay CBR value increased from 7.3% to 31.8%. This shows that the ash mixture of rice husk and matos is quite effective in increasing the carrying capacity of clay soil. Keywords : Matos, CBR, Rice Husk Ash
Pengaruh Penambahan Pasir Terhadap Tingkat Kepadatan dan Daya Dukung Tanah Lempung Lunak Christian Prasenda; Setyanto Setyanto; Iswan Iswan
Jurnal Rekayasa Sipil dan Desain Vol 3, No 1 (2015): Edisi Maret 2015
Publisher : Jurnal Rekayasa Sipil dan Desain

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Abstract

The problem of strength and resilience of soil is one of things that really need to considered in theplanning and construction work of a civilian building . This is because the land in question servesas a medium that holds the load or the action of a construction that is built on it . Stabilizationusing sand material is one way to meet the needs of the required strength . Changes in weatherand temperature in the field are factors that makes the ground unstable .The type of soil is soft clay stabilized from the Rawa Sragi village, Jabung District, East LampungDistrict. This research was conducted by using a mixture of sand with variations mixture of 5%,10% and 15%. After the CBR testing, Density, Atterberg Limits and Specific Gravity for eachsample.The more variations of a mixture of sand were added resulting in declining water levels that wouldmake the value of the soil carrying capacity increases, the value of density and plastic limitincreased, while the value of the liquid limit and plasticity index decrease.Keywords: sand, soft clay, bearing
Hubungan Pengujian Cbr Metode Tumbukan Dengan Alat Uji Cbr Metode Tekanan Berdasarkan Uji Pemadatan Standard Devrisvansyah Irwan; Andius Dasa Putra; Aminudin Syah; Iswan Iswan
Jurnal Rekayasa Sipil dan Desain Vol 9, No 3 (2021): Edisi September 2021
Publisher : Jurnal Rekayasa Sipil dan Desain

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Abstract

The importance of soil as construction material needs to be considered carefully. With various soil conditions, a physical test is required to discover the characteristics of the soil and California Bearing Ratio (CBR) test in a laboratory to determine the bearing capacity of the basic land (subgrade). This research was conducted to assess the suitability of the CBR test value with two different compaction tools.The results of the CBR test with the collision method without immersion resulted in the design CBR value of 7.7% and the CBR value of the immersion sample of 3.6%. Meanwhile, the CBR test using a pressure modification device, the CBR values obtained in the samples not immersed at a pressure of 3 MPa, 6 MPa, 9 MPa, and 12 MPa, were 4.2%, 6.8%, 9.8%, and 11.4%. The CBR valuesfor the immersion samples were 2.95%, 4.2%, 4.45%, and 4.56%. The results obtained from the design CBR value of the pressure method with a pressure of 6MPa which is closest to the collision CBR value with a difference of 0.9% for no immersion and 0.6% for immersion. The assumption that the difference between the two methods is due to the compaction energy of 6 MPa strength is not the same as the energy produced from the use of hammer energy according to ASTM D 698, Test Method for Laboratory Compaction Characteristics.
Studi Analisis Daya Dukung Tanah Lempung Berplastisitas Tinggi yang Dicampur Zeolit Rian Alfian; Lusmeilia Afriani; Iswan Iswan
Jurnal Rekayasa Sipil dan Desain Vol 3, No 2 (2015): Edisi Juni 2015
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Abstract

C lay has properties that are not profitable for construction. This is because the bearing capacityof the soil or low CBR have low value. Therefore we need a stabilizing agent that can reduce soilproperties which are unprofitable, usually accompanied by binding to each soil grain with theother .The research was done by testing on clay samples without a mixture and the clay that is mixedwith zeolite with a variation of 6%, 8%, 10%, 12% and 14%. Tests were performed using standardand modified compaction which previously done curing for 14 days. After compaction test, thesamples were soaked for 4 days and then followed by mechanical testing which is CBR test thataimed to determine the bearing capacity value of the soil after the sample was mixed by zeolites.Based on the results of laboratory research, the highest value obtained on the sample CBR claywith a mixture of 14% zeolite with the use of modified compaction with 14 days of curingand 4days of soaking in the amount of 2.78%. This is because the effect of zeolite which can bind clayparticles. So, the more a mixture of zeolite then bearing capacity of the soil also increasing.However, the value of CBR in this research can not be used as subgrade in road constructionbecause of its CBR value ≤ 6%.Keywords: CBR, Soil Clay, Zeolite
Hubungan Sifat-Sifat Fisik Tanah dan Aktivitas Tanah Terhadap Nilai Koefisien Permeabilitas Yang Dipengaruhi Campuran Semen Berdasarkan Uji Laboratorium S. Indira Adhi Ariana; Iswan Iswan; Aminudin Syah
Jurnal Rekayasa Sipil dan Desain Vol 9, No 2 (2021): Edisi Juni 2021
Publisher : Jurnal Rekayasa Sipil dan Desain

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Abstract

Soil is the materials that has a very important role to support the construction on it. Soil permeability value for every construction is different. Such differences affect the strength of a civil construction to be built. The problem that is caused by settlement as seen in Palembapang, Umbul Ligoh, the soil is soft in the rainy season and its bearing capacity becomes low, so it makes a lot of construction problems. Therefore it is necessary to attempt to manipulate the soil permeability value by adding cement as an additive ingredients with the percentage of 0%, 4%, 8% and 12% to a soil permeability values obtained in order to meet the standard of civil construction to be built. Cement has very fine particles so that it can fill the soil pores and has a function as a strong binder. In testing physical properties, the soil includes the classification of A-7-6 soil or poorly categorized soil types.Due to cement addition into soft clay, compaction with the standard proctor experienced a decrease the optimum moisture content (OMC) and an increase in the weight of maximum dry volume, then in the permeability test, the permeability coefficient decreased 2,52%. The composition of the cement mixture affects the value of soil permeability. The lower permeability value follows the amount of cement mixture on the soil. The most change on permeability coefficient was recorded by the sample mixed with 12% of cement.
Pengaruh Waktu Perendaman Terhadap Uji Kuat Tekan Paving Block Menggunakan Campuran Tanah dan Kapur dengan Alat Pemadat Modifikasi DELLA ANDANDANINGRUM; Iswan Iswan; Setyanto Setyanto
Jurnal Rekayasa Sipil dan Desain Vol 4, No 4 (2016): Edisi Desember 2016
Publisher : Jurnal Rekayasa Sipil dan Desain

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Paving block is a composition ingredient construction made from mixture of portland cement or a kind of adhesive hydrolysis, water, and aggregates with or without other ingredients. Concrete bricks can colored as original color or given substance color on composition and used for page both inside nor outside construction. In this study the process of manufacture of paving blocks will use a mix of soil and chalk. Moreover, soaking of the paving blocks that are expected to increase the strength of paving blocks is according to SNI 03-0691-1996. Soil samples tested were from Kota Baru, South Lampung. Composition blend of soil and chalk with variation time to soak is 7 days, 14 days, 21 days, and 28 days, as well as to the treatment of pre-combustion and post-combustion of the sample of paving blocks. Based on the results of physical testing the original soil, USCS classify soil samples as fine-grained soil and belong to the group ML. Results from this study is the manufacture of paving blocks using silt soil and chalk soil material that does not meet the specifications of SNI 03-0691-1996. This is because the weakness on modification compactor which are use when make a sampel. For the compressive strength of paving blocks pre-combustion and post-combustion are best shown in soaking time of 28 days. The compressive strength that generated as a whole still does not meet the specifications of the paving block SK SNI 03-0691-1996 that is a minimum compressive strength at 85 kg/cm2. But value of water absorption meets the specification 03-0691-1996 which is 3%-10%.Keyword : Paving block, slit soil, compressive strength, soil burning.
Co-Authors Abdil Hafizh Arrofiq Achmad Satria Nursar Ade Setiawan Ahmad Zakaria Ahmad Zakaria Albertus Willy Pratama Aldy Fernanda Alward Farabi Amal Khairan Andius Dasa Putra Andius Dasa Putra Aswir Aswir Ati Kusmawati Aulia R Sudarman Ayu Ning Trias Pratiwi Badruzzaman Aji Bahar, Herwina Bahfen, Munifah Basuki Sri Hermanto Bravo Pandiangan Carissa, Caroline Clara Christian Prasenda Dani Aprizal DELLA ANDANDANINGRUM Desti Rahayu Devrisvansyah Irwan Dewi, Afini Riani Dhea Chandra Dewi, Dhea Chandra Dewi Diah Andika Sari Diah Larasati DIRGANTARA WICAKSONO Duha, Mayunata Faanzir, Faanzir Fatmi Riandini Fatria, Akhmad Ridho Ferdi Ferdian Fikri Alami Fikri Alami Fransiskus Afrie Hadi, Sofian Hadidah, Indah Handayani, Friska Hany Octavia Anggraini Happy Indira Dewi hardianto widyastomo Haryati Haryati Hatapayo , Abdul Aziz Hedi Saputra hermawan arbenta Husainah, Nazifah I Komang Tri Herdiana Ikratul Herman Imam Wahyudin Indah Parsianti Istikomah Istikomah Jafri, M. julian fahlefi Lusmeilia Afriami Lusmeilia Afriani Lusmeilia Afriani M Lucky Apriansyah Nawawi M. Fahmi Rinaldi M. Iqbal Hermawan Ma'rufi, Ma'rufi Markus Manik martha vepti dhina Mirsa Susmarani Muhammad Aldani Muhammad Ilyas Muhammad Jafri muhammad karami Muhammad Nur Kholiq Muhammad Rendi Ramdhani Natanael Sembiring Nawawi Nawawi NURWAHIDAH NURWAHIDAH Ofik Taufik Purwadi, Ofik Taufik Panca Kurniawan Prayitno, Irwan Putra Andrean A. Putri, Silfa Nayyira Rahayu Sulistyiorini Rahayu Sulistyorini Rahman, Muhammad Natsir Rasyid, Ramly Renold Pangidoan Rambe Restu Agusni Retno Primantiko Retno Wulandari Rian Alfian Riansyah Putra Rio Dwi Septian Risqon Septian Ritonga, Matnur Rizki Dwi Putra Rizki Prinanda Umar Rizki, Fildzah Rizki, M. Rosmini Maru S. Indira Adhi Ariana Saiful Bahri Salsabila Atalia Sadil Sejati, Septias Herson Setyanto Setyanto Sherliana Sherliana Sholehuddin, Sholehuddin Sindu Abadi Sampurna Siti Yulianah M. Yusuf SRIYANTI RAHMATUNNISA Sulaiman Zhiddiq, Sulaiman Sumiharni Sumiharni Sundi, Venni Herli Suryaningsih Suryaningsih Susilo, G.E. Syah, Aminudin SYAMSU ALAM Taufik Ramadhani Taufiq Qurrahman Umar Umar Wahyudhi, Aden Wijayanti, Nurulita WINATA, WIDIA yulisna anggi Yupi Ardianto Yusak Maryunianta