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All Journal WARTA Prosiding Simposium Nasional Rekayasa Aplikasi Perancangan dan Industri Proceeding ISETH (International Summit on Science, Technology, and Humanity) Prosiding Seminar Nasional Teknik Sipil UMS Prosiding University Research Colloquium DEVOTE: Jurnal Pengabdian Masyarakat Global
Muhammad Ujianto
Universitas Muhammadiyah Surakarta
Humanities Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Education Electrical & Electronics Engineering Engineering Environmental Science Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Mechanical Engineering Medicine & Pharmacology Social Sciences Other

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Pengaruh Pozzolan Buatan dari Abu Eceng Gondok terhadap Kuat Tekan dan Daya Serap Air Beton Normal Alfarisi, Ibnu Kamal; Nurchasanah, Yenny; Ujianto, Muhammad; Rochman, Abdul
Prosiding Seminar Nasional Teknik Sipil UMS 2024: Prosiding Seminar Nasional Teknik Sipil UMS
Publisher : Universitas Muhammadiyah Surakarta

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Abstract

Abu eceng gondok merupakan pozzolan buatan yang dapat dipergunakan sebagai tambahan atau sebagai pengganti sebagian campuran beton. Tujuan dalam penelitian ini adalah untuk mengetahui nilai kuat tekan dan daya serap air beton yang dicampur dengan abu eceng gondok yang biasa disebut dengan pozzolan buatan sebagai penggantian sebagian semen sebanyak 0%,8%,10%,12%. Metode yang digunakan dalam penelitian ini adalah metode eksperimental dengan perkembangan nilai kuat tekan beton yang diuji pada umur 28 hari, serta daya serap air beton. Pengujian kuat tekan sendiri menggunakan silinder beton ukuran 15 cm x 30 cm dan untuk pengujian daya serap air menggunakan silinder ukuran 10 cm x 20 cm. Berdasarkan hasil penelitian dilakukan pengujian beton segar (slump test) didapatkan nilai tertinggi yaitu pada beton normal dengan menggunakan semen PPC 100% dibandingkan dengan semen OPC dengan penggantian sebagian abu eceng gondok. Pada beton normal semen PPC 100% didapatkan nilai kuat tekan sebesar 14,77 MPa dan kenaikkan terjadi pada variasi abu eceng gondok 12% sebesar 5,43% dengan nilai kuat tekan sebesar 20,20 MPa. Pemakaian variasi abu eceng gondok serapan airnya semakin kecil dibandingkan beton normal semen PPC 100%, dimana beton dengan 12% abu eceng gondok daya serap airnya yang paling rendah dan yang paling kedap air.
Model Analysis and Laboratory Experiments of Strengthening Diagonal Wall Panels in Concrete Structures Nurchasanah, Yenny; Ujianto, Muhammad
Proceeding ISETH (International Summit on Science, Technology, and Humanity) 2015: Proceeding ISETH (International Conference on Science, Technology, and Humanity)
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/iseth.2346

Abstract

Walls, even though being included in non-engineering building element, actually have the strength and stiffness. In this study, the wall elements will be analyzed regarding the influence in a system of reinforced concrete frame. The other side of this research is the adoption of high-rising building technology in the use of shear wall elements into earthquake-safe homes.This technology is to prevent the wall from quick collapse when exposed to seismic forces are by strengthening the areas diagonally. Diagonal area is an area where there will be the greatest shear force effects, and it is characterized by the appearance of cracks or even splitting on the diagonal area. The modeling of reinforced concrete structures is applied to SAP2000 to open frame and frame with concrete panels as filler. This is modeled as bracing representing an area of wall. There are 37 test objects of open frame and frame with wall concrete panels as filler (100x50x7), with diagonal reinforcement/bracing of the group of steel reinforcing. SAP2000 analysis results indicate that the structure with wall panels have a higher value than the capacity of open frame structure. Laboratory experimental data with compression test showed increased values up to 215.36% on the frame with wall panel, an increase of 271.99% on the frame wall panels with diagonal steel reinforcement. Flexural test showed increased values up to 37.73% on the frame with wall panel and an increase of 260.76% on the frame wall panels with diagonal steel reinforcement. The addition of diagonal reinforcement elements is conducted to divide the force received by the wall and to increase the strength of the wall and the stiffness of the structural system.
EDUKASI PEMASARAN BATA MERAH RAMAH LINGKUNGAN PADA KELOMPOK PENGRAJIN SENDEN JAYA, KLATEN Magfirona, Alfia; Hisan, Rumaisa; Isa, Muzakar; Ujianto, Muhammad; Kusuma, Nabil Belantara; Lestari, Nila Kusuma Ayu; Wicaksono, Akmal; Geraldy, Mochammad
Devote: Jurnal Pengabdian Masyarakat Global Vol. 4 No. 4 (2025): Devote: Jurnal Pengabdian Masyarakat Global, 2025
Publisher : LPPM Institut Pendidikan Nusantara Global

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55681/devote.v4i4.4841

Abstract

The problem of wood waste, particularly wood dust, is a pressing environmental issue for the furniture industry in Senden Village, Ngawen District, Klaten Regency. Waste that is usually burned or piled up causes pollution and impacts public health. The innovation of processing waste into environmentally friendly red bricks is a solution that has a selling value, is lighter, has good thermal insulation, and supports the eco-friendly concept. However, the artisan group still faces obstacles in the traditional marketing aspect. The objective of this community service activity is to analyze and implement marketing strategies, specifically through a digital approach, for the Senden Jaya Furniture Artisan Group. The activity methods include outreach, workshops, mentoring, and evaluation with the involvement of partner members as the main active participants. The results show an increase in partner skills in utilizing digital platforms such as Tokopedia as an online sales channel and TikTok and Instagram as creative promotional tools. Based on the post-test results, participants' understanding of digital marketing has significantly increased, and the product's image as an environmentally friendly brick has improved. These findings demonstrate that digital marketing strategies are effective in increasing partner economic value while supporting sustainable waste management.
Pengaruh Molaritas NaOH dan Komposisi Abu Bonggol Jagung terhadap Kuat Tekan dan Modulus Elastisitas Beton Geopolimer Ujianto, Muhammad; Farhanah, Dika Nabila; Septiana, Sri; Setiawan, Budi; Handayani, Nur Khotimah
Prosiding Simposium Nasional Rekayasa Aplikasi Perancangan dan Industri 2025: Prosiding Simposium Nasional Rekayasa Aplikasi Perancangan dan Industri
Publisher : Universitas Muhammadiyah Surakarta

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Abstract

Beton geopolimer merupakan material ramah lingkungan yang memanfaatkan fly ash sebagai pengganti semen untuk mengurangi emisi CO₂ dari proses industri semen konvensional. Penelitian ini bertujuan menganalisis pengaruh variasi molaritas NaOH dan penambahan abu bonggol jagung (ABJ) terhadap kuat tekan serta modulus elastisitas beton geopolimer. Variasi ABJ yang digunakan 0%,1%,3% dan 5% menggunakan alkali aktivator NaOH 10 M, 12M, dan 14M dengan Na2SiO3 (rasio 1:3). Pengujian kuat tekan dan modulus elastisitas dilakukan pada umur 28 hari, dengan perawatanoven suhu 60° C selama 24 jam dan steam suhu 60° C selama 14 hari kemudian perawatan dengan suhu ruang hingga 28 hari. Hasil penelitian menunjukkan bahwa semakin tinggi molaritas NaOH dan semakin besar penambahan ABJ, maka semakin baik performa mekanis beton geopolimer yang dihasilkan. Pada perawatan oven, penggunaan NaOH 10 M menghasilkan kuat tekan 25,05-32,72 MPa dengan peningkatan modulus elastisitas dari 23.447,679 menjadi 26.862,552 MPa seiring kenaikan ABJ. NaOH 12 M memberikan hasil tertinggi, yaitu kuat tekan 26,93-34,30 MPa serta modulus elastisitas 24.384,115-27.316,711 MPa. Pada perawatan steam, NaOH 10 M menghasilkan kuat tekan 25,15-30,14 MPa, sedangkan NaOH 14 M menunjukkan peningkatan menjadi 27,08-31,69 MPa dengan modulus elastisitas 24.379- 26.418 MPa. Secara keseluruhan, kombinasi NaOH 12 M dan substitusi ABJ 5% terbukti memberikan performa paling optimal. Temuan ini menegaskan bahwa abu bonggol jagung berpotensi digunakan sebagai bahan tambahan dalam beton geopolimer untuk meningkatkan sifat mekanis sekaligus mendukung pemanfaatan limbah pertanian sebagai material konstruksi berkelanjutan.
Co-Authors Abdul Rochman Alfarisi, Ibnu Kamal Alfia Magfirona Aliem Sudjatmiko Alim, Maulana Mansyurudin Budi Setiawan Dedy Kurniawan Ernawati, Santi Farhanah, Dika Nabila Geraldy, Mochammad Haq, Fandi Ahmad Dhia Ul Hisan, Rumaisa Kusuma, Nabil Belantara Laksono, Indra Agung Lestari, Nila Kusuma Ayu Moch. Solikin, Moch. Muzakar Isa Nur Khotimah Handayani Pambayu, Rizki Aji Qunik Wiqoyah Riatmojo, Erik Rizki Aji Pambayu Septiana, Sri Wicaksono, Akmal Yenny Nurchasanah