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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 Edukasi Elita : Jurnal Inovasi Pendidikan Jurnal Papeda: Jurnal Publikasi Pendidikan Dasar Jurnal Pendidikan dan Kebudayaan Rekayasa : Jurnal Ilmiah Fakultas Teknik Universitas Lampung Nemui Nyimah
Iswan Iswan
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Religion Agriculture, Biological Sciences & Forestry Arts Humanities Astronomy Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management 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 Transportation Other

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Menentukan Nilai CBR Menggunakan Alat DCP Dalam Grafik Dan Persamaan Fungsi Ardianto, Yupi; Setyanto, Setyanto; Iswan, Iswan
Jurnal Rekayasa Sipil dan Desain (JRSDD) Vol. 5 No. 3 (2017): Edisi September 2017
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jrsdd.v5i3.741

Abstract

Kekuatan tanah dasar memegang peranan penting dalam mendukung suatu konstruksi seperti; jalan, bangunan gedung , jembatan dan sebagainya. Dan untuk menilai kekuatan tanah dasar tersebut, dipergunakanlan nilai CBR (California Bearing Ratio). Tetapi seringkali di lapangan, karena keterbatasan transportasi pada daerah pedalaman dan ketersediaan alat pengujian yang cukup memadai, alat yang paling mudah untuk mendapatkan nilai CBR dari tanah dasar tersebut dapat digunakan alat Dinamic Cone Penetrometer (DCP). Dari data pengujian alat DCP tadi, dengan menggunakan fungsi logaritma tertentu sesuai dengan besaran sudut konus dari alat DCP, yaitu 30o atau 60o, yang kemudian digambarkan dalam grafik hubungan antara besaran penetrasi dan jumlah tumbukan, didapatlah besaran nilai CBR. Grafik hubungan yang digunakan adalah perumusan dari Smith dan Pratt, 1983 untuk sudut konus 300 dengan persamaan Log CBR = 2,503 – 1,15 (Log DCP), dan TRL, Road Note 8, 1990, untuk sudut konus 600 dengan persamaan Log CBR = 2,48 – 1,057 (Log DCP). Sebelumnya sudah ada, grafik hubungan DCP dan CBR, akan tetapi untuk menentukan nilai CBR yang dihasilkan, harus menggunakan cara diterawang menggunakan kertas lain, dan hal ini cukup menyulitkan jika titik yang diuji sangat banyak jumlahnya. Dengan perhitungan logaritma yang diaplikasikan ke grafik dan persamaan fungsi, diharapkan dapat mempermudah dan mempersingkat waktu yang dibutuhkan untuk mengolah data DCP yang diuji. Kata kunci : Tanah dasar, grafik DCP, hubungan DCP dan CBR, logaritma DCP
Pengaruh Waktu Pemeraman Terhadap Daya Dukung Tanah Lempung Dan Lanau Yang Distabilisasi Dengan Menggunakan Kapur Pada Kondisi Rendaman (Soaked CBR) Afrie, Fransiskus; Afriani, Lusmeilia; Iswan, Iswan
Jurnal Rekayasa Sipil dan Desain (JRSDD) Vol. 5 No. 4 (2017): Edisi Desember 2017
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jrsdd.v5i4.746

Abstract

ABSTRACTThe soil layer is the bottom layer that has function to forward the load from construction on it. But not always the basic soil layer is able has function properly as the bearing capacity. The soil stabilization method with lime additive is an alternative that can be used in planning on a unstable soil construction. The aim of this research is to know the physical characters of clay soil in Sidodadi Asri area, Jati Agung subdistrict, South Lampung regency and the type of silt soil in Yosomulyo area, East Metro District, Metro City. And also to know the increase of the bearing capacity of both types of soil with variation of curing time of 7, 14 and 28 days. From the result of the physical character research and mechanical of original soil samples obtained so it can be concluded that land taken from Sidodadi Asri village classified as clay with high plasticity, while the soil from yosomulyo village is clay with low plasticity. And on the CBR test in the ideal soaking conditions with ideal lime content showed that the increase of CBR value in each soil type along with the increase of the curing duration of 2.8%, 4%, 6.4% and 10.2% in clay and 2, 2%, 3%, 3.6% and 6% in silt soils. This suggests that the ideal lime composite in addition to the curing duration gives a positive effect to increase bearing capacity soil or CBR value. Keywords: Lime, Stabilization, Clay and Silt Soil, Soaked CBR. 
Perbaikan daya dukung tanah dasar lempung yang distabilisasi dengan additive kapur dan matos terhadap kualitas lama waktu pemeraman Umar, Rizki Prinanda; Iswan, Iswan; Zakaria, Ahmad
Jurnal Rekayasa Sipil dan Desain (JRSDD) Vol. 6 No. 1 (2018): Edisi Maret 2018
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jrsdd.v6i1.792

Abstract

The subgrade is the base surface for placement of other pavement parts.  The strength and durability as well as the thickness of the pavement construction layer depend on the properties and carrying capacity of this basic soil.  There are many types of soil, one of the basic types of soil that can be said to be bad for a construction is a soil with clay type. The soil samples used were taken from Sidorejo village, Sidomulyo district, South Lampung, then in this study the soil samples were mixed with matos and lime with variations of 5, 8, 10 and 12%.  After obtaining the highest CBR value, soil samples were immersed with the duration of 7, 14, 21, and 28 days to be tested again its CBR value.Soil in this study belongs to the group A-7-5, with LL values 74.112%, PL 35.44% and PI 38.669%.  The dry weight value (γd) and the optimum water content (ωopt) increased as the amount of lime content added to the sample.  In the CBR test, the highest increase of CBR value occurred on a 12% lime mixture variation of 21.5%.  While for CBR testing after curing without immersion, the highest CBR value is found on 28 days of curing duration of 45%.  The addition of lime and matos proved to increase the value of CBR and soil bearing capacity. Keywords : Clay Soil, CBR, Matos, Lime
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 Sampurna, Sindu Abadi; Iswan, Iswan; Zakaria, Ahmad
Jurnal Rekayasa Sipil dan Desain (JRSDD) Vol. 5 No. 2 (2017): Edisi Juni 2017
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jrsdd.v5i2.801

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 Zat Additive Abu Sekam Padi dan Matos Terhadap Nilai CBR (California Bearing Ratio) Tanah Lempung Sampurna, Sindu Abadi; Iswan, Iswan; Zakaria, Ahmad
Jurnal Rekayasa Sipil dan Desain (JRSDD) Vol. 6 No. 1 (2018): Edisi Maret 2018
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jrsdd.v6i1.805

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. 
Stabilisasi Tanah Lempung yang Dicampur Zat Additive Kapur dan Matos Dtinjau Dari Waktu Perendaman Herdiana, I Komang Tri; Iswan, Iswan; Zakaria, Ahmad
Jurnal Rekayasa Sipil dan Desain (JRSDD) Vol. 6 No. 1 (2018): Edisi Maret 2018
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jrsdd.v6i1.806

Abstract

In order to obtain a good, strong and sturdy foundation layer, good soil carrying capacity is required.  In addition, the soil also serves to support the foundation of a civil construction such as buildings and pavement. Therefore it is necessary to do soil improvement for soil types that have low carrying capacity. In this final project, a research on high plasticity clay soil is taken from Sidorejo area, Sidomulyo district, South Lampung to find CBR value with variation of immersion time.  From this research, we can see the change of CBR value with immersion variations that have been done for 4, 5, 14, and 28 days.From the research conducted in the Laboratory of Soil Mechanics of Lampung University , it is known that the soil originating from Sidorejo area, Sidomulyo District Southern Lampung is classified into A-7-5 clay soil which has a soil bearing capacity value of 7%.  After the improvement of soil with lime additive substances with optimum content of 12% and 3,472 gr of matos stabilizer which is then done with immersion test with a duration of 4, 5, 14 and 28 days, the value of CBR is 24% at 4 days, 22% at 5 days, 15.6% at 14 days and 9% at 28 days.  The value of CBR obtained tends to decrease as the duration of immersion is increased, so it can be concluded the duration of immersion greatly affects the size of soil bearing capacity.
Prilaku Subgrade Pada Studi Kasus Tebal Perkerasan yang di Subtitusi Menggunakan Semen Yandriguna, Medi; Iswan, Iswan; Zakaria, Ahmad
Jurnal Rekayasa Sipil dan Desain (JRSDD) Vol. 6 No. 4 (2018): Edisi Desember 2018
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jrsdd.v6i4.995

Abstract

In the field of highway damage to road pavement in addition to weather factors and overloading can also occur due to poor subgrade. A good alternative so that the soil on the highway subgrade does not experience excessive swelling is to use cement additives.Soil samples were tested using subgrade soil material originating from the RA. Basyid passageway of Fajar Baru Village, Jati Agung Subdistrict, South Lampung at STA 3 + 900 and variations of cement used were 0, 4, 8 and 12%. The test carried out is by testing the swelling of soil against CBR which has been marred for 3 days, then based on the results of the test, the calculation of pavement thickness was carried out by the method of analysis of components of SKBI 2.3.26.1987.In testing physical properties, the soil includes the classification of A-6 soil or poorly categorized soil types. However, after adding variations in soil classification cement into a good A-2-4 category. In the CBR swelling test on 0% cement percentage swelling values were 0.62% and CBR 0.9%, in the 4% percentage swelling value 0.27% and CBR 42.6%, at the percentage of 8% swelling value 0.19% and CBR 53.2%, and 12% percentage swelling value 0.06% and CBR 78.1%. From the calculation of the pavement thickness, the greater the CBR value, the thicker the thickness of each layer.Keywords: CBR, Soil Swelling, Pavement Thickness, Stabilization, Cement
Analisa Kegagalan Struktur Lereng Tanah Pada Jalur Ganda Dengan Menggunakan Analisis Komputasi (Studi Kasus : Sta 208 + 00 Doeble Track Kereta Api Martapura- Baturaja) Septian, Rio Dwi; Iswan, Iswan; Zakaria, Ahmad
Jurnal Rekayasa Sipil dan Desain (JRSDD) Vol. 7 No. 2 (2019): Edisi Juni 2019
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jrsdd.v7i2.1212

Abstract

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
Implementasi Pendidikan Karakter Siswa dada Pembelajaran Tematik Kelas IV di SD Negeri Kelapa Dua 05 Pagi Hayatin Nusyur; Iswan Iswan
Edukasi Elita : Jurnal Inovasi Pendidikan Vol. 3 No. 3 (2026): Juli: Edukasi Elita : Jurnal Inovasi Pendidikan
Publisher : Lembaga Pengembangan Kinerja Dosen

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62383/edukasi.v3i3.3377

Abstract

Character education is an essential part of elementary education because learning should develop not only academic achievement but also students’ attitudes and behavior. This study aimed to describe the implementation of character education in thematic learning for fourth-grade students at SD Negeri Kelapa Dua 05 Pagi, Kebon Jeruk, West Jakarta, and identify obstacles and efforts to overcome them. This study employed a qualitative descriptive approach conducted from October to December 2025. Data were collected through semi-structured interviews, structured non-participant observations, and documentation. Data were analyzed through data collection, reduction, display, and conclusion drawing. The findings showed that character education was implemented through lesson planning, classroom activities, teacher modeling, habituation, assignments, and appreciation of students’ achievements. The character values developed included religiosity, honesty, tolerance, discipline, curiosity, environmental care, social care, and responsibility. The main obstacles were limited learning media, limited variation in teaching methods, time constraints in assessing students’ attitudes, and inconsistent character support at home. Teachers addressed these obstacles through learning adaptations, motivation, appreciation, behavior monitoring, and communication with parents. The study concludes that character education can be strengthened through consistent teacher modeling, varied learning strategies, and school-family collaboration.
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 Ati Kusmawati Auli, Septriza Aulia R Sudarman Aurelius Silvanno Krisdiyanto Ayu Ning Trias Pratiwi Badruzzaman Aji Basrinang Basrinang Basuki Sri Hermanto 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 Hayatin Nusyur Hedi Saputra Herdiana, I Komang Tri hermawan arbenta Hermawan, M. Iqbal Herwina Bahar 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 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 Munifah Bahfen 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 Suryaningsih Suryaningsih Susilo, G.E. Syah, Aminudin SYAMSU ALAM Taufik Ramadhani Taufiq Qurrahman Umar Umar Umar, Rizki Prinanda Untung Suwardoyo Venni Herli Sundi Wahyudhi, Aden Wahyuni, Nanda Dwi Widyastomo, Hardianto Wijayanti, Nurulita WINATA, WIDIA Yandriguna, Medi yulisna anggi Yupi Ardianto Yusak Maryunianta Yusuf, Siti Yulianah M