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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 Teras Jurnal 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) Mestaka: Jurnal Pengabdian Kepada Masyarakat COREAI: Jurnal Kecerdasan Buatan, Komputasi dan Teknologi Informasi Jurnal Kabar Masyarakat JPNM : Jurnal Pustaka Nusantara Multidisiplin AN-NAS: Jurnal Pengabdian Masyarakat Jurnal Papeda: Jurnal Publikasi Pendidikan Dasar Jurnal Pendidikan dan Kebudayaan Jurnal Pendidikan dan Kebudayaan Rekayasa : Jurnal Ilmiah Fakultas Teknik Universitas Lampung Nemui Nyimah
Iswan Iswan
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Korelasi antara Kuat Tekan Bebas dengan Kuat Tekan Geser langsung pada Tanah Lanau Disubstitusi dengan Pasir Sudarman, Aulia R; Afriani, Lusmeilia; Iswan, Iswan
Jurnal Rekayasa Sipil dan Desain (JRSDD) Vol. 4 No. 2 (2016): Edisi Juni 2016
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jrsdd.v4i2.384

Abstract

This study aims to get the correlation between the soil compressive strength and soil shearstrength directly on silt substituted with granulated materials. This is done because if buildingstructures on the silt soil will cause several problems including a small value of the compressivestrength and low shear strength after incurring. For the testing is done with a mixture of sand, siltsoil so that it can be seen how much sand mixture to resist the forces on the load that is above theground.To determine the sand effect on silt soil , with the compressive strength and shear strength that hasbeen made by way of mixing the sand by 10%, 20%, 30% and 40%. From the test results showedan increase in the compressive strength of 0.3723 kg/cm 2 in a mixture of 10% sand and a decreasein the mixture thereafter. In the direct shear strength value increased 30% when variations mixtureof sand that is equal to 0.4290 kg / cm 2 , the cohesion of 0.27 kg / cm 2 and the friction angle in at26.170.Keywords: silt soil, sand, soil compressive strength, soil direct shear
Studi Perbandingan Uji Pemadatan Standar dan Uji Pemadatan Modified Terhadap Nilai Koefisien Permeabilitas Tanah Lempung Berpasir Sembiring, Natanael; Iswan, Iswan; Jafri, Muhammad
Jurnal Rekayasa Sipil dan Desain (JRSDD) Vol. 4 No. 3 (2016): Edisi September 2016
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jrsdd.v4i3.401

Abstract

AbstractConstruction of a construct in civil engineering requires that the material in top shape.The soil that became the foundation of a structure should reach the prime condition to be able to sustain the existing structure on it. But in fact it is not easily met at a project site . This research will compare the compacted soil permeability values are standard with compacted soil permeability values are modified. Soil of the sample in this study were taken from the  sukajawa village , Lampung Tengah. The soil was taken from two locations with different types. The soil is then mixed with sand which then compacted using standard methods and methods modified. Permeability testing is done to obtain permeability coefficient. Based on the original soil physical test , AASHTO soil 1 put into groups of A - 7-5 and the second soil  into a group of A- 7-6, which means the land is clay soil types and USCS classify the soil into fine-grained soil. The observations in the laboratory showed that compaction with different methods show different results and the amount of a mixture of sand affects the value of soil density.Keywords : Soil clay , sand , compaction and permeability.  
Pengaruh Variasi Waktu Pemeraman Terhadap Nilai Uji Kuat Tekan Bebas pada Tanah Lempung dan Lanau yang Distabilisasi Menggunakan Kapur pada Kondisi Optimum Hafizh Arrofiq, Abdil; Afriani, Lusmeilia; Iswan, Iswan
Jurnal Rekayasa Sipil dan Desain (JRSDD) Vol. 4 No. 3 (2016): Edisi September 2016
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jrsdd.v4i3.427

Abstract

In this study used raw material such as silt and clay soil with a mixture of lime additive which has a variety of levels of 5%, 10%, and 15% as well as with a variety of curing time for 7 days, 14 days and 28 days.The purpose of this study to increase the compressive strength of silt and clay soil free them. Soil samples tested in this study represents silt soil from the village Yosomulyo, East Metro District, Metro City, while the clay is derived from Rawa Sragi, Jabung District, East Lampung regency.After doing research, from the third level, the compressive strength maximum free of silt and clay soil found in the levels of 15% with 28 days curing time. This is due to the greater levels of lime and the longer the curing time, the greater the unconfined compression value.Keywords: Clay Soil, Silt Soil, Unconfined Compression, lime.
Pengaruh Penambahan Pasir Terhadap Tingkat Kepadatan dan Daya Dukung Tanah Lempung Lunak Prasenda, Christian; Setyanto, Setyanto; Iswan, Iswan
Jurnal Rekayasa Sipil dan Desain (JRSDD) Vol. 3 No. 1 (2015): Edisi Maret 2015
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jrsdd.v3i1.429

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
Korelasi Kuat Tekan Bebas dengan Kuat Geser Langsung pada Tanah Lempung yang dicampur dengan Zeolit Hermawan, M. Iqbal; Afriani, Lusmeilia; Iswan, Iswan
Jurnal Rekayasa Sipil dan Desain (JRSDD) Vol. 3 No. 1 (2015): Edisi Maret 2015
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jrsdd.v3i1.430

Abstract

This research was conducted to determine the effect between zeolite and clay of compressivestrength and shear strength. Construction founded on clay will cause some impact, such as lack ofcompressive strength and shear strength. Therefore, before the construction of structures on theclay, the clay must be stabilized first. In this research, soil stabilization using zeolite.Based on the results of this research there was an increase in the compressive strength of clay by94,5 % from 0,2975 kg/cm 2 be 0,5787 kg/cm 2 , and improving the clay cohesion of 54,17 % from0.24 kg/cm 2 be 0,36 kg/cm 2 , and the increase in the maximum shear strength of 43,89 % of 0.4754kg/cm 2 be 0,6841 kg/cm 2 , the additon of zeolite until 10%. From these values it can be concluded,compressive strength and shear strength increases as a percentage addition of zeolite, althoughthe increase that occurred in the unconfined compressive strength and direct shear strength is notas great.Keywords : Clay, Zeolite, Uncofined Compressive Strenght, Shear Strenght
Hubungan Nilai Konsolidasi dan Nilai Kuat Tekan Bebas pada Tanah Lempung yang Disubtitusi Material Pasir Kurniawan, Dedy; Iswan, Iswan; Setyanto, Setyanto
Jurnal Rekayasa Sipil dan Desain (JRSDD) Vol. 3 No. 1 (2015): Edisi Maret 2015
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jrsdd.v3i1.432

Abstract

This study was conducted to determine the behavior of reduction and compressive strength in claywhich is substituted with sand material and to see the correlation between the value ofconsolidation and the compressive strength on the soil. Because the clay when getting loadingthere will be a significant reduction in soil that affects the reduction in carrying capacity orcompressive strength of the soil. In this study used clay from the village of Belimbing Sari, Jabungdistrict, East Lampung with the coordinates of 105° 39 '10.74 "T and 5 ° 31' 44.26" S.The research was done by testing on samples without a mixture of clay and the clay soil mixedwith sand with varying amounts of sand mixture of 10%, 20%, and 30%. Testing was conducted ona standard compaction test to find the optimum water content, consolidation testing to find thevalue of the coefficient of consolidation (Cv), compression index (Cc) and coefficient ofcompression (Av) and compressive strength testing are free to seek the compressive strength on thesoil.Based on the results of this study can be seen in the behavior of a mixture of clay and sand withoutonce mixed with sand material that is an increase in the value of the coefficient of consolidation(Cv), a decrease in the value of compression index (Cc) and coefficient of compression (Av) and anincrease in the compressive strength (qu) in the clay soil. Value increases and decreases that occurwithout a mixture of clay and after mixed variations mixture of 10%, 20%, and 30% tend to bestable. From this study it can be concluded that the value of consolidation and strong correlationpress substituted clay with sand material that is smaller then the consolidation of soil compressivestrength will be greater as well.Keywords: Soil Clay, Sand, Consolidation, Soil Compressive Strength
Pengaruh Penambahan Pasir Terhadap Tingkat Kepadatan dan Daya Dukung Tanah Lempung Organik Ferdian, Ferdi; Jafri, Muhammad; Iswan, Iswan
Jurnal Rekayasa Sipil dan Desain (JRSDD) Vol. 3 No. 1 (2015): Edisi Maret 2015
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jrsdd.v3i1.433

Abstract

The problem of density level and bearing capacity of soil is one of things that really need toconsidered in the planning and construction work of a civilian building . This is because the landin question serves as a medium that holds the load or the action of a construction that is built on it. Stabilization using sand material is one way to meet the needs of the required strength . Changesin weather and temperature in the field are factors that makes the soil unstable .The type of soil is organic clay stabilized from the Gedong Pasir village, Jabung District, EastLampung District. This research was conducted by using a mixture of sand with variations mixtureof 5 %, 10 % and 15 %. After the CBR testing, Density, Atterberg Limits and Specific Gravity foreach sample.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, organic clay, bearing capacity
Korelasi Kuat Tekan dengan Kuat Geser pada Tanah Lempung yang Didistribusi dengan Variasi Campuran Pasir Pratama, Albertus Willy; Iswan, Iswan; Jafri, Muhammad
Jurnal Rekayasa Sipil dan Desain (JRSDD) Vol. 3 No. 1 (2015): Edisi Maret 2015
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jrsdd.v3i1.434

Abstract

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
Komparasi Nilai Daya Dukung Tanah Lempung Ditinjau dari Hasil Uji Skala Penetrasi Konus Dinamis, Uji CBR Laboratorium dan Uji Kuat Tekan Bebas Nursar, Achmad Satria; Iswan, Iswan; Setyanto, Setyanto
Jurnal Rekayasa Sipil dan Desain (JRSDD) Vol. 3 No. 2 (2015): Edisi Juni 2015
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jrsdd.v3i2.451

Abstract

Soil bearing capacity can be determined with several kind of test, that could produce different testresult for same sample in accordance to characteristics of test equipment and main targets of eachtest equipment in determining soil parameters. This research aimed to compare characteristics ofsoil bearing capacity that obtained from DCP (Dynamic Cone Penetrometer) test, LaboratoryCBR test, and UCS (Unconfined Compressive Strength) test.The soil sample which tested on this research was from Margakaya village and Palputih village,District of Jati Agung, South Lampung and Blimbing Sari village, District of Jabung, EastLampung. Soil sample for Laboratory CBR test was made by compaction. Meanwhile, soilsamples for UCS test was undisturbed soil and remoulded sample.The result of research showed that the CBR value of DCP test result was greater than theLaboratory CBR test result with margin less than 1%. The CBR value was directly proportional tothe compressive strength of its soil. Meanwhile, the DCPI value of DCP test result was inverselyproportional to the design CBR value and the compressive strength of its soil.Keywords: California Bearing Ratio, DCPI, clay, compressive strength
Studi Analisis Daya Dukung Tanah Lempung Berplastisitas Tinggi yang Dicampur Zeolit Alfian, Rian; Afriani, Lusmeilia; Iswan, Iswan
Jurnal Rekayasa Sipil dan Desain (JRSDD) Vol. 3 No. 2 (2015): Edisi Juni 2015
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jrsdd.v3i2.455

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
Co-Authors A., Putra Andrean Abdil Hafizh Arrofiq Achmad Satria Nursar Ade Setiawan Ade Setiawan Afriami, Lusmeilia Afrie, Fransiskus Agusni, Restu Ahmad Zakaria Ahmad Zakaria Aji, Badruzzaman Albertus Willy Pratama Aldani, Muhammad Aldy Fernanda Alward Farabi Amal Khairan Andandaningrum, Della Andius Dasa Putra Andius Dasa Putra Anggi, Yulisna Anggraini, Hany Octavia Aprizal, Dani arbenta, hermawan ARDIANSYAH ARDIANSYAH Ardianto, Yupi Ariana, S. Indira Adhi Aswir Aswir Auli, Septriza Aulia R Sudarman Aurelius Silvanno Krisdiyanto Ayu Ning Trias Pratiwi Badruzzaman Aji Bahar, Herwina Bahfen, Munifah Basrinang Basrinang Basuki Sri Hermanto Basuki Srihermanto Bravo Pandiangan brina, ardi elsa Carissa, Caroline Clara Christian Prasenda Dani Aprizal DELLA ANDANDANINGRUM Desti Rahayu Devrisvansyah Irwan Dewi, Afini Riani Dhea Chandra Dewi, Dhea Chandra Dewi Dhina, Martha Vepti Diah Andika Sari Diah Larasati Diah Larasati, Diah DIRGANTARA WICAKSONO Duha, Mayunata Faanzir, Faanzir Fahlefi, Julian Farabi, Alward Fatmi Riandini Fatria, Akhmad Ridho Fatria, Akhmad Ridho Ferdi Ferdian Ferdian, Ferdi Fernanda, Aldy Fikri Alami Fikri Alami Fransiskus Afrie Hadi, Sofian Hadidah, Indah Hafizh Arrofiq, Abdil Handayani, Friska Hany Octavia Anggraini Happy Indira Dewi hardianto widyastomo Haryati Haryati Hatapayo , Abdul Aziz Hedi Saputra Herdiana, I Komang Tri hermawan arbenta Hermawan, M. Iqbal I Komang Tri Herdiana I Wayan Diana Ichsani, Muhammad Desyan Ikratul Herman Imam Wahyudin Indah Parsianti Irwan, Devrisvansyah Istikomah Istikomah Jafri, M. julian fahlefi karami, muhammad Kholiq, Muhammad Nur Kristianto Usman Kurniawan, Panca Kusmawati, Ati Laksmi Irianti Lusmeilia Afriami Lusmeilia Afriani Lusmeilia Afriani M Lucky Apriansyah Nawawi M. Fahmi Rinaldi M. Iqbal Hermawan Ma'rufi, Ma'rufi Manik, Markus Markus Manik Marlina Marlina martha vepti dhina Masdar Helmi Mirsa Susmarani Mughaffir Yunus Muhammad Aldani Muhammad Ilyas Muhammad Jafri Muhammad Jafri muhammad karami Muhammad Nur Kholiq Muhammad Rendi Ramdhani Nasruddin Nasruddin Natanael Sembiring Nawawi Nawawi Nawawi Nawawi Nazifah Husainah Nidya Putri Syahida Nursar, Achmad Satria NURWAHIDAH NURWAHIDAH Ofik Taufik Purwadi, Ofik Taufik Panca Kurniawan Pandiangan, Bravo Pangestu, Beno Balakosa Prasenda, Christian Pratama, Albertus Willy Pratiwi, Ayu Ning Trias Prayitno, Irwan Putra Andrean A. Putra, Riansyah Putra, Rizki Dwi Putri, Silfa Nayyira Qurrahman, Taufiq Rahayu Sulistyiorini Rahayu Sulistyorini Rahayu Sulistyorini Rahman, Muhammad Natsir Ramadhani, Taufik Rambe, Renold Pangidoan Rasyid, Ramly Renold Pangidoan Rambe Restu Agusni Retno Primantiko Retno Wulandari Rian Alfian Rian Alfian, Rian Riansyah Putra Rinaldi, M. Fahmi Rio Dwi Septian Risqon Septian Ritonga, Matnur Rizki Dwi Putra Rizki Prinanda Umar Rizki, Fildzah Rizki, M. Rois Rois Rosmini Maru Rufi'i S. Indira Adhi Ariana Sadil, Salsabila Atalia Sahidin, Sudirman Saiful Bahri Salsabila Atalia Sadil Sampurna, Sindu Abadi Sejati, Septias Herson Sembiring, Natanael Septian, Rio Dwi Septian, Risqon Setyanto Setyanto Sherliana Sherliana Sherliana, Sherliana Sholehuddin, Sholehuddin Sindu Abadi Sampurna Siti Yulianah M. Yusuf SRIYANTI RAHMATUNNISA Sudarman, Aulia R Suherman Suherman Sulaiman Zhiddiq, Sulaiman Sulistyiorini, Rahayu Sumiharni Sumiharni Sundi, Venni Herli Suryaningsih Suryaningsih Susilo, G.E. Syah, Aminudin SYAMSU ALAM Taufik Ramadhani Taufiq Qurrahman Umar Umar Umar, Rizki Prinanda Untung Suwardoyo Wahyudhi, Aden Wahyuni, Nanda Dwi Widyastomo, Hardianto Wijayanti, Nurulita WINATA, WIDIA Yandriguna, Medi yulisna anggi Yupi Ardianto Yusak Maryunianta Yusuf, Siti Yulianah M