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All Journal Teknika: Jurnal Sains dan Teknologi Wahana Teknik Sipil: Jurnal Pengembangan Teknik Sipil Science and Technology Indonesia BENTANG : Jurnal Teoritis dan Terapan Bidang Rekayasa Sipil CANTILEVER Jurnal Abdimas Mandiri International Journal of Community Service Indonesian Journal of Engineering and Science (IJES) International Journal of Humanities Education and Social Sciences Cantilever: Jurnal Penelitian dan Kajian Bidang Teknik Sipil Jurnal Talenta Sipil International Journal of Health, Engineering and Technology
Adhitya, Bimo Brata
Sriwijaya University
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Pendampingan Administrasi Sederhana dan Legalitas Usaha Bagi Usaha Mikro di Desa Ulak Kerbau Lama Kecamatan Tanjung Raja Kabupaten Ogan Ilir Mandasari, Lisa; Adhitya, Bimo Brata; Pratiwi, Feny Selly
Jurnal Abdimas Mandiri Vol. 9 No. 1
Publisher : UNIVERSITAS INDO GLOBAL MANDIRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36982/jam.v9i1.4802

Abstract

Usaha mikro merupakan kelompok usaha yang cukup mampu untuk bertahan di saat kondisi ekonomi yang kurang stabil, namun sulit untuk berkembang meskipun situasi ekonomi dalam kondisi yang stabil dan kondusif. Hal tersebut tidak terlepas dari beberapa persoalan atau masalah yang dihadapi masyarakat / para pelaku usaha mikro, salah satunya terkait manajemen / pengelolaan usaha mereka. Pengelolaan usaha belum dilaksanakan dengan baik, dalam hal administrasi masih banyak masyarakat yang belum melakukan pengadministrasian meskipun secara sederhana. Selain itu, dalam hal legalitas sebagian besar dari masyarakat pelaku usaha mikro masih belum mempunyai legalitas usaha. Tujuan kegiatan PkM ini adalah memberikan informasi dan juga pengetahuan kepada pelaku usaha mikro tentang administrasi sederhana dan pentingnya kelengkapan alat organisasi usaha serta menyampaikan informasi serta menanamkan pemahaman kepada pelaku usah mikro tentang cara membuat legalitas usaha. Metode pelaksanaan pengabdian adalah dengan sosialisasi, pelatihan dan juga pendampingan dengan perserta yang berjumlah 25 orang pelaku usaha. Hasil kegiatan dari pengabdian ini yaitu terdapat peningkatan pemahaman tentang pengadministrasian meskipun secara sederhana seperti kelengkapan alat organisasi usaha (logo, alamat, nomor kontak, kop surat, stempel, buku tamu, dan nota kwitansi) termasuk buku catatan keuangan dan pengetahuan tentang cara membuat Nomor Induk Berusaha (NIB) maupun perizinan Produk Industri Rumah Tangga (PIRT) untuk usaha olahan pangan secara online melalui OSS (Online Single Submission) menjadi lebih meningkat karena sebagian besar pelaku UMKM di Desa Ulak Kerbau Lama Kecamatan Tanjung Raja Kabupaten Ogan Ilir belum memiliki legalitas usaha.
Balancing strength and porosity: A critical evaluation of cement substitution with metakaolin in porous concrete Rahmadillah, Auliya; Adhitya, Bimo Brata; Sari, Fitria Putri Lintang
Jurnal Teknika Vol 21, No 1 (2025): June 2025
Publisher : Faculty of Engineering, Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/tjst.v21i1.32646

Abstract

Rapid urbanization has led to increased impervious surfaces, exacerbating stormwater runoff and urban flooding. As a response, pervious concrete has emerged as an innovative solution in sustainable infrastructure due to its high porosity, enabling water infiltration and flood mitigation. This study evaluates the impact of varying percentages of metakaolin as a partial cement substitute on the mechanical properties, permeability, and porosity of pervious concrete. Metakaolin, as a reactive pozzolanic material, is expected to enhance mechanical strength while maintaining the concrete’s drainage function. Five mix variations with 10%, 12.5%, 15%, 17.5%, and 20% metakaolin as a partial cement substitute were tested at concrete ages of 7 and 28 days. The results show that the optimal composition was achieved with a 15% metakaolin substitution, yielding 13.17 MPa compressive strength, 3.87 MPa splitting tensile strength, 0.469 cm/s permeability, and 24.34% porosity at 28 days. The addition of metakaolin in moderate amounts improves density and structural strength, but higher proportions significantly reduce permeability. These findings highlight the importance of achieving a balance between mechanical performance and hydraulic function in metakaolin-based pervious concrete design.
OPTIMASI KUAT TEKAN PASTA GEOPOLIMER BERBAHAN DASAR FLY ASH DENGAN VARIASI RASIO MASSA FLY ASH DAN ALKALI AKTIVATOR (FA/AA) Nayobi, Budi; Rosidawani; Brata Adhitya, Bimo
Wahana Teknik Sipil: Jurnal Pengembangan Teknik Sipil Vol. 30 No. 1 (2025): Wahana Teknik Sipil
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/wahanats.v30i1.6441

Abstract

Cement production generates high CO₂ emissions, which have a negative impact on the environment. To reduce this carbon footprint, alternative materials to cement are needed. Geopolymer paste presents a promising solution as it utilizes industrial waste such as fly ash, is environmentally friendly, and can achieve good mechanical strength. This study aims to optimize the compressive strength of fly ash-based geopolymer paste by varying the mass ratio of fly ash to alkaline activator (FA/AA). The fly ash used was characterized using X-Ray Fluorescence (XRF), X-Ray Diffraction (XRD), and Scanning Electron Microscope (SEM) to determine its crystal structure, chemical composition, and particle morphology. The characterization results indicate that the fly ash is predominantly amorphous, classified as Class F according to ASTM C618-2019, and has spherical particles with sizes less than 2 µm, making it suitable as a geopolymer precursor. Test specimens were prepared in the form of 50 mm × 50 mm × 50 mm cubes, and compressive strength tests were conducted at 3, 7, and 28 days with varying FA/AA ratios. The test results showed that compressive strength increased with the FA/AA ratio up to an optimum ratio of 2.5, then decreased at a ratio of 3. This indicates that the FA/AA ratio significantly affects the development of compressive strength in geopolymer paste. These findings are expected to serve as a foundation for developing environmentally friendly alternative materials to replace Portland cement.
Co-Authors Adiguna, Adiguna Alia, Febrinasti Alzahri, Syahril Anthony Costa Betty Susanti Betty Susanti, Betty Butarbutar, Samuel Citra Indriyati Costa, Anthony Hamzah Hasyim Hasbi, Edlin Al Khuzaifah Hendro Cahyono I Putu Leo Pramana Ika Juliantina Kencana Verawati Lisa Mandasari M. Baitullah Al Amin, M. Baitullah Melawaty Agustien, Melawaty Mulyadi Eko Purnomo Nayobi, Budi Nur Alam Fajar Pramana, I Putu Leo Pratiwi, Feny selly Qolbi, Muhammad Khofidul Rahmadillah, Auliya Reffanda Kurniawan, Reffanda Rosidawani Rosidawani, Rosidawani Sadila, Yunira Samsuryadi Sari, Fitria Putri Lintang Yulindasari Sutejo, Yulindasari