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Resmi Bestari Muin
Universitas Mercu Buana
Humanities Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Public Health Social Sciences Transportation Other

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Pemberdayaan Masyarakat dalam Pengelolaan Limbah Rumah Tangga Mandiri Melalui Program Bank Sampah di Meruya Selatan Resmi Bestari Muin; Pintor Tua Simatupang; Juny Andry Sulistyo; Reni Karno Kinasih; Sylvia Indriany
Jurnal Pengabdian West Science Vol 3 No 06 (2024): Jurnal Pengabdian West Science
Publisher : Westscience Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58812/jpws.v3i06.1273

Abstract

Sebagian masyarakat Kelurahan Meruya Selatan masih terbiasa membakar sampah rumah tangganya, hal ini menimbulkan polusi udara dan potensi terjadinya kebakaran. Berbagai pihak perlu ambil andil untuk melepaskan kebiasaan membakar sampah di masyarakat, mulai dari pemerintah, pihak swasta, maupun akademisi. Oleh karena itu, perlu adanya pemahaman mengenai pengelolaan sampah yang benar, selain untuk menciptakan pola hidup bersih dan sehat juga untuk mengambil manfaat dari sampah. Yang dimaksud dengan pemberdayaan masyarakat dalam pengelolaan limbah rumah tangga secara mandiri melalui program bank sampah pada kegiatan pengabdian kepada masyarakat ini merupakan program untuk melatih masyarakat untuk mandiri dalam mengelola sampah. Tujuan dari kegiatan ini adalah untuk memberikan informasi dan pemahaman tentang pentingnya pemilahan sampah mulai dari lingkungan keluarga, melibatkan masyarakat dan pemerintah setempat. Kegiatan ini dilakukan secara tatap muka di RPTRA Meruya Selatan, dan terbukti dapat meningkatkan kesadaran masyarakat akan pentingnya pengelolaan sampah dengan  memilah sampah berdasarkan jenisnya, hal ini terlihat dari survey (kuesioner) yang diisi oleh para peserta.
Efek Molaritas Aktivator (NaOH) pada Beton Geopolymer dengan Bahan Pengikat Limbah Fly Ash PLTU Lontar: Molarity Effect of Activator (NaOH) on Geopolymer Concrete with Fly Ash Waste Binding Material from PLTU Lontar Bawono, Dapit; Muin, Resmi Bestari
Cantilever: Jurnal Penelitian dan Kajian Bidang Teknik Sipil Vol. 12 No. 2 (2023): Cantilever
Publisher : Department of Civil Engineering and Planning, Faculty of Engineering, Sriwijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35139/cantilever.v12i2.253

Abstract

The average temperature of the earth's surface has increased by 0.74 ± 0.18°C over the past hundred years, caused by 65% carbon dioxide (CO2) emissions. Of the total CO2 emissions, around 6% come from the cement industry. Geopolymer concrete can be a solution to the problem because it does not use cement as a binder, but uses fly ash and activator materials. This activator material is to activate fly ash to become a binder. The aim of this study was to determine the effect of variations in the molarity of the NaOH activator on the workability, setting time, and compressive strength of geopolymer concrete. This study used fly ash from PLTU Lontar with a ratio of NaOH:NNa2SiO3 of 1:1.5, then the NaOH was varied with concentration levels of 5 Molar, 8 Molar, 11 Molar, and 14 Molar. From this research, it is known that the molarity level of the activator (NaOH) affects the workability (slump value), setting time, and compressive strength of concrete. The higher the molarity level of the activator (NaOH), the lower the workability of the concrete (the slump value decreases), the slower the setting time of the concrete, and the higher the compressive strength of the concrete. The most optimal variation is 14 Molar NaOH geopolymer with a slump value of 15 cm, initial setting time of 90 minutes, final setting time of 203 minutes, and compressive strength at 28 days of 54.60 MPa.
Pengaruh Batu Kuarsit dan Gamping Koral Terhadap Kehilangan Kuat Tekan Pada Beton Dalam Kondisi ASR Setiyadi, Syukur; Muin, Resmi Bestari; Sukamdo, Pariatmono
Konstruksia Vol 15, No 1 (2023): Jurnal Konstruksia Vol 15 No. 1 Tahun 2023
Publisher : Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jk.15.1.1-13

Abstract

Batu kuarsit dan Batu gamping wilayah pesisir Kab. Pati dan Kab. Blora belum termanfaatkan optimal sebagai agregat kasar [23]. Diteliti sifat fisik agregat kasar serta komposisi kimia, untuk kemudian digunakan dalam mendapatkan karakteristik beton agregat kasar kuarsit dan batu gamping. Pengujian 18 (delapan belas) silinder beton QS 70%:30% LS pada kondisi perawatan terendam air suhu 20°C untuk kuat tekan, kuat tarik belah, dan modulus elastisitas dilaksanakan. Dievaluasi komposisi kimia CaO agregat kasar dan hubungannya dengan kuat tekan beton. Pengujian Lost in Compressive Strength dilakukan atas 6 silinder beton dalam lingkungan ASR 80°C. Penggantian 30% agregat kasar kuarsit (QS) dengan batu gamping (LS) menunjukkan hasil kuat tekan 19.69 MPa dan 29.85 MPa untuk w/c rasio 0.61 dan 0.47 secara berurutan. komposisi kimia CaO (Calcium Oxide) QS dan LS dengan nilai 49.293% dan 54.462%, adapun kandungan SiO2 diperoleh 2.874% dan 1.517% untuk QS dan LS secara berurutan. Terdapat hubungan negatif lemah antara kandungan CaO agregat kasar terhadap kuat tekan beton dan density beton. Terjadi kehilangan kuat tekan (LICS) sebesar -4.7% pada beton w/c 0.61 dan 13.7% untuk beton w/c 0.47, mengindikasikan terdapat peningkatan kuat tekan 4.7% untuk beton w/c rasio 0.61 dan terjadi penurunan kuat tekan 13.7% untuk beton w/c rasio 0.47 pada umur 28 hari lingkungan ASR.
Fourier representation of geometrical imperfection for probabilistic buckling analysis Sukamdo, Pariatmono; Oktavia, Tuti; Muin, Resmi Bestari; Ontowirjo, Budianto; Ihsan, Mohammad; Sitompul, Sang Toga
SINERGI Vol 28, No 3 (2024)
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/sinergi.2024.3.003

Abstract

This research studies the first part of the failure of a compression member structure due to buckling. This unstable equilibrium collapse, exposes brittle failure which occurs suddenly and therefore should be avoided wherever possible. Unavoidable geometric imperfections due to structural fabrication, will weaken the structure against buckling. The behavior of bar under compression will be closely examined by taking a set of geometric imperfection data synthesized from previously available from the measurement of conical shells. Therefore, the two-dimensional surface imperfection is converted into several one-dimensional imperfection with some probability properties. In order to obtain a comparison tool for different type of imperfections, Fourier analysis is used to convert the imperfection into coefficients of trigonometric function. By examining the coefficients, geometric imperfection patterns introduced by a certain fabrication process are able to be identified. The study successfully demonstrates the applicability of Fourier analysis in representing inherent geometric imperfections as an initial step for conducting probabilistic buckling analysis. Fourier analysis has shown its capability to simultaneously characterize imperfections in two crucial parameters - the magnitude and configuration of the imperfection.
The Effect of Variation in the Length of Water Hyacinth Fiber Twisted on Split Tensile Strength High-Performance Fiber Concrete Verdian, Riki; Muin, Resmi Bestari
ASTONJADRO Vol. 12 No. 2 (2023): ASTONJADRO
Publisher : Universitas Ibn Khaldun Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32832/astonjadro.v12i2.9346

Abstract

One of the weaknesses of concrete is that it has a very small tensile strength, which makes it brittle. Normal concrete has a tensile strength of 9-15% of its compressive strength. To increase the tensile strength of concrete, it is necessary to add fiber. The types of fibers that can be used in concrete can be either natural fibers or non-natural fibers. Various alternatives can be made as an effort to improve the quality of concrete. One of them is by utilizing weeds or weeds into useful materials. One of these disturbing plants is the water hyacinth plant, which is quite abundant and grows very fast. Water hyacinth plants consist of stems, leaf petals, which are rich in fiber, which allows it to be used as an alternative additive in concrete mixtures for construction. The purpose of this research is to try to apply water hyacinth fiber (SEG) 0,75% in high performance concrete (HPC) to determine the effect of the ratio of water hyacinth fiber twisted length on the compressive strength and split tensile strength of high performance concrete with several variants fiber lengths of 2 cm, 1,5 cm and 1 cm. The results showed that the decrease in the compressive strength of water hyacinth fiber-rolled concrete for variations of 2 cm, 1,5 cm and 1 cm were respectively 10,76%, 14,16%, and 18,76% of the reference concrete compressive strength of 45,42 MPa and the highest splitting tensile strength of concrete is in the 1 cm fiber length variation of 3,65 MPa which is 9.89% of the concrete compressive strength of 36,90 MPa. The modulus value decreases with the variation in the length of the fiber strand.
Peningkatan Pengetahuan Tukang tentang Struktur Atas Rumah Sederhana Ramah Gempa Suci Putri Elza; Resmi Bestari Muin
KREATIF: Jurnal Pengabdian Masyarakat Nusantara Vol. 5 No. 3 (2025): Jurnal Pengabdian Masyarakat Nusantara
Publisher : Pusat Riset dan Inovasi Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55606/kreatif.v5i3.8001

Abstract

Many simple houses in Indonesia, particularly in Menes District and its surroundings, Pandeglang Regency, are built without considering earthquake resistance principles. This is a serious problem considering that the region is prone to disasters, making the vulnerability of the buildings potentially pose a significant risk to the safety of occupants. One aspect that is often overlooked is the superstructure construction, which plays a crucial role in maintaining the overall stability of the building. Weaknesses in this section can cause severe damage and even collapse during an earthquake. This situation is exacerbated by the lack of knowledge and skills of builders regarding earthquake-resistant housing concepts and a lack of access to standard technical guidelines. To address this issue, this community service program was designed to improve the understanding and skills of builders in building earthquake-resistant simple house superstructures. The activities were carried out through a combination of theoretical and practical training covering the basic principles of earthquake resistance, appropriate material selection, and construction techniques that comply with building safety standards. This training is a collaboration between Mercu Buana University and PT. Tunas Engineering, ensuring that the approach provided is more applicable and relevant to real-world needs. The targeted program outputs include a significant increase in the level of understanding of the craftsmen as measured through pre- and post-training evaluations, the development of a simple training module as a work guide, and the formation of a community of craftsmen who care about earthquake-resistant construction.
Co-Authors Adelfy Dara Arianti Agnes Hanna Patty, Armin Naibaho, Singgih Fitra Utama, Arianti, Adelfy Dara Bawono, Dapit cahyadi cahyadi Fidi Fidi Fidi, Fidi Friska Damayanti Ghivari Alkindy Juny Andry Sulistyo Mohammad Ihsan Oktavia, Tuti Ontowirjo, Budianto Pintor Tua Simatupang Rahmat Hidayat Reni Karno Kinasih Sagir Alva Setiyadi, Syukur Sitompul, Sang Toga Suci Putri Elza Suhartono Sukamdo, Pariatmono Syaiful Ashari Sylvia Indriany Verdian, Riki Yusup Supriawan