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All Journal J-Sil (Jurnal Teknik Sipil dan Lingkungan) Civil Engineering Dimension Pendas : Jurnah Ilmiah Pendidikan Dasar E-JRM J-Sil (Jurnal Teknik Sipil dan Lingkungan)
Ramadhan, Fathur
Unknown Affiliation
Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Economics, Econometrics & Finance Engineering Environmental Science Transportation Other

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Pengaruh Penambahan CaCO3 terhadap Parameter Kuat Geser Pasir Pantai Tri Julianto, Baskoro; Ramadhan, Fathur; Fauzan, Muhammad; Putra, Heriansyah
Jurnal Teknik Sipil dan Lingkungan Vol. 8 No. 3: Desember 2023
Publisher : Departemen Teknik Sipil dan Lingkungan, IPB University and The Institut of ENgineering Indonesia (PII), Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jsil.8.03.233-239

Abstract

Tanah pasir merupakan salah satu jenis tanah yang memiliki sifat mekanik yang baik. Namun, tanah pasir dapat menjadi mimpi buruk bila dalam kondisi jenuh serta terbebani secara siklik terus-menerus. Kondisi seperti ini dapat memicu terjadinya potensi likuefaksi. Upaya penambahan bahan aditif sebagai upaya perbaikan tanah banyak dilakukan untuk meminimalkan dampak dari potensi likuefaksi tersebut. Penelitian ini melakukan upaya peningkatan kuat geser pasir pantai dengan menambahkan CaCO3 Teknis sebagai upaya perbaikan dan stabilisasi tanah. Pasir pantai yang digunakan merupakan pasir dengan gradasi buruk yang dapat dibuktikan dari nilai Koefisien Derajat Keseragaman (Cc) sebesar 0,90 dan nilai Koefisien Kelengkungan (Cu) sebesar 4,00. Selain itu, dilakukan juga pengujian sifat fisis lain berupa pemeriksaan kadar air, pemeriksaan berat isi kering, pemeriksaan berat isi basah, pemeriksaan berat jenis butir, pemeriksaan angka pori serta pemeriksaan porositas. Sampel diberi perlakuan berupa penambahan CaCO3 dengan dosis sebanyak 10% dan 20%. Hasil pengujian laboratorium yang telah dilakukan menunjukkan peningkatan nilai parameter kuat geser tanah yang disajikan dalam bentuk model persamaan linear serta memperlihatkan perubahan nilai parameter kuat geser pasir berupa sudut geser dalam dan kohesi secara berturut-turut dengan nilai sebesar 25,82% dan 25,00% untuk sampel dengan dosis CaCO3 sebesar 10% serta 54,43% dan 250,00% untuk sampel dengan dosis CaCO3 sebesar 20%.
Pengaruh Litererasi Keuangan, Akses Pembiayaan dan Perencanaan Keuangan Terhadap Keberlanjutan Usaha Mikro di Night Market Pasar Besar Kota Malang. Ramadhan, Fathur; Susyanti, Jeni; Novianto, Abdullah Syakur
E-JRM : Elektronik Jurnal Riset Manajemen E-JRM : Elektronik Jurnal Riset Manajemen Vol. 14 No. 01
Publisher : UNIVERSITAS ISLAM MALANG

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Abstract

Abstract This study aims to analyse and describe the effect of Financial Literacy, Access to financing and Financial Planning on Micro Business Sustainability in the Night Market Pasar Besar Malang City. The population used in this study were micro business owners in the night market Pasar Besar Malang City. The sample in the study using the Slovin formula obtained 93 respondents. This study analyses data using the Statistical Package for the Social Science (SPSS) Version 30.00 tool. The dependent variable used in this study is Business Sustainability, Financial Literacy, access to financing and financial planning as independent variables. The results of this study indicate that Financial literacy has no significant effect on business sustainability,  Access to financing has a negative Significant effect on business sustainability, Financial planning has no significant effect on business sustainability. Keywords: Business Sustainability, Financial Literacy, Access to Financing, Financial Planning
Improvement of Shear Strength of Clay Shale Soil using Polymer-Calcite Precipitation (PCP) as Soil Stabilization Technique Ramadhan, Fathur; Fauzan, Muhammad; Putra, Heriansyah; Sudibyo, Tri
Civil Engineering Dimension Vol. 27 No. 2 (2025): SEPTEMBER 2025
Publisher : Institute of Research and Community Outreach - Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9744/ced.27.2.214-222

Abstract

Clay shale is an expansive soil owing to its shrinkage and expansion, leading to geotechnical issues, such as loss of strength. This study explored the effectiveness of the Polymer–Calcite Precipitation (PCP) method in improving clay shale's shear strength. This study evaluated the optimum Polyvinyl Alcohol (PVA) concentration for enhancing the shear strength and identifying the residual shear strength of the treated soil. Various tests were conducted to determine the soil properties and assess soil improvement using direct shear tests. The results indicate that adding PVA increases the cohesion value of saturated clay shale and maintains its residual strength close to its peak strength value, with the optimum concentration of 4% PVA boosting cohesion from 4.47 kPa to 32.83 kPa. In conclusion, the PCP method effectively enhances the shear strength of clay shale and offers a potential solution for soil stabilization.
Pengaruh Penambahan CaCO3 terhadap Parameter Kuat Geser Pasir Pantai Tri Julianto, Baskoro; Ramadhan, Fathur; Fauzan, Muhammad; Putra, Heriansyah
Jurnal Teknik Sipil dan Lingkungan Vol. 8 No. 3: Desember 2023
Publisher : Departemen Teknik Sipil dan Lingkungan IPB

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jsil.8.03.233-239

Abstract

Tanah pasir merupakan salah satu jenis tanah yang memiliki sifat mekanik yang baik. Namun, tanah pasir dapat menjadi mimpi buruk bila dalam kondisi jenuh serta terbebani secara siklik terus-menerus. Kondisi seperti ini dapat memicu terjadinya potensi likuefaksi. Upaya penambahan bahan aditif sebagai upaya perbaikan tanah banyak dilakukan untuk meminimalkan dampak dari potensi likuefaksi tersebut. Penelitian ini melakukan upaya peningkatan kuat geser pasir pantai dengan menambahkan CaCO3 Teknis sebagai upaya perbaikan dan stabilisasi tanah. Pasir pantai yang digunakan merupakan pasir dengan gradasi buruk yang dapat dibuktikan dari nilai Koefisien Derajat Keseragaman (Cc) sebesar 0,90 dan nilai Koefisien Kelengkungan (Cu) sebesar 4,00. Selain itu, dilakukan juga pengujian sifat fisis lain berupa pemeriksaan kadar air, pemeriksaan berat isi kering, pemeriksaan berat isi basah, pemeriksaan berat jenis butir, pemeriksaan angka pori serta pemeriksaan porositas. Sampel diberi perlakuan berupa penambahan CaCO3 dengan dosis sebanyak 10% dan 20%. Hasil pengujian laboratorium yang telah dilakukan menunjukkan peningkatan nilai parameter kuat geser tanah yang disajikan dalam bentuk model persamaan linear serta memperlihatkan perubahan nilai parameter kuat geser pasir berupa sudut geser dalam dan kohesi secara berturut-turut dengan nilai sebesar 25,82% dan 25,00% untuk sampel dengan dosis CaCO3 sebesar 10% serta 54,43% dan 250,00% untuk sampel dengan dosis CaCO3 sebesar 20%.
PENINGKATAN HASIL BELAJAR PESERTA DIDIK MENGGUNAKAN MODEL PROJECT BASED LEARNING (PjBL) PADA MATERI IPAS KELAS IV SDN 33 SAWAHAN KOTA PADANG Ramadhan, Fathur; Arwin
Pendas : Jurnal Ilmiah Pendidikan Dasar Vol. 11 No. 03 (2026): Volume 11 No. 03, September 2026 Produce
Publisher : Program Studi Pendidikan Guru Sekolah Dasar FKIP Universitas Pasundan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23969/jp.v11i03.61737

Abstract

This study was motivated by classroom observations showing that students' science learning outcomes were still low because the learning process remained teacher-centered, limiting student participation and engagement. The study aimed to improve the science learning outcomes of fourth-grade students at SDN 33 Sawahan, Padang City through the implementation of the Project-Based Learning (PjBL) model. This research employed Classroom Action Research (CAR) using qualitative and quantitative approaches. The study was conducted in two cycles, each consisting of planning, implementation, observation, and reflection. Data were collected through observation, tests, and non-test techniques to evaluate the implementation of the PjBL model and students' learning outcomes. The research subjects included the classroom teacher as observer, the researcher as practitioner, and 22 fourth-grade students of SDN 33 Sawahan, Padang City. The findings indicate that the implementation of the PjBL model improved both the learning process and student achievement. The average score for the teaching module increased from 89.6% (Good) in Cycle I to 95.8% (Very Good) in Cycle II. Teacher activity improved from an average of 89.06% (Good) to 96.8% (Very Good), while student activity also increased from 89.06% (Good) to 96.8% (Very Good). Students' average learning outcomes rose significantly from 67.28 (Fair) in Cycle I to 90.45 (Very Good) in Cycle II. These results demonstrate that the Project-Based Learning model effectively enhanced student participation and learning outcomes in science. Therefore, the study concludes that the Project-Based Learning model is effective in improving science learning outcomes for fourth-grade students at SDN 33 Sawahan, Padang City.
Co-Authors Abdullah Syakur Novianto Arwin Jeni Susyanti Julianto, Baskoro Tri Muhammad fauzan Putra, Heriansyah Tri Sudibyo