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All Journal Rekayasa Sipil Journal of Civil Engineering BENTANG : Jurnal Teoritis dan Terapan Bidang Rekayasa Sipil Jurnal Kesehatan Poltekkes Kemenkes RI Pangkalpinang Composite Journal PROSISKO : Jurnal Pengembangan Riset dan observasi Rekayasa Sistem Komputer Sewagati Jurnal Pengabdian Pada Masyarakat Eldimas Jurnal Teknik Sipil Advance Sustainable Science, Engineering and Technology (ASSET) Jurnal Pengabdian Kepada Masyarakat
Hazen Masrafat
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Agriculture, Biological Sciences & Forestry Arts Humanities Biochemistry, Genetics & Molecular Biology Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Nursing Public Health Social Sciences Transportation Other

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The Effect of Sulfate Exposure on The Mechanical Properties of Conventional Portland Composite Cement Concrete Masrafat, Hazen; Sutrisno, Wahyuniarsih; Tajunnisa, Yuyun
Journal of Civil Engineering Vol 39, No 2 (2024)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j20861206.v39i2.19030

Abstract

The durability of concrete is an essential factor in construction as a means to enhance the quality of public facilities planning. The durability of concrete structures can be degraded due to several factors, one of the factors is sulfate attack concrete. Expose to magnesium sulfate (MgSO4) causes more aggressive damage compared to sodium sulfate. The negative effect of sulfate exposure is the accelerated formation of microcracks that lead to concrete deterioration. This study aims to investigate the influence of expose to a 5% magnesium sulfate solution on the mechanical properties of Portland composite cement concrete (PCC). Sulfate exposure was conducted after the PCC concrete was cured in water for 28 days. Observations and testing were carried out in four stages: before exposure, after 28, 56, and 90 days. The compressive strength of the concrete increased by 8.78% after 56 days of exposure but decreased by 7.2% from the 56-day strength during the 90-day exposure. The modulus of elasticity, Poisson's ratio, tensile strength, and fracture energy were directly proportional to the compressive strength values generated during sulfate exposure. Additionally, the mass of the concrete increased by 0.87% after 56 days of exposure and then decreased to 0.56% during the 90-day exposure.
FABAKO: Program Pemanfaatan Limbah Fly Ash dan Bottom Ash (FABA) sebagai Paving Jalan untuk Meningkatkan UMKM Masyarakat Paiton Tajunnisa, Yuyun; Cahyani, Arwinda Aribah; Masrafat, Hazen; Hariyanto, Ifarrel Rachmanda; Wibowo, Yosi Noviari; Alfayet, Muhamad Rifki; Halisah, Vonny Nur
Sewagati Vol 8 No 5 (2024)
Publisher : Pusat Publikasi ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j26139960.v8i5.2186

Abstract

Desa Sumberrejo menghadapi dua permasalahan utama yakni, akses jalan yang buruk dan dampak limbah dari PLTU Paiton. Akses jalan yang tidak layak memerlukan renovasi, sementara limbah Fly Ash dan Bottom Ash (FABA) dari PLTU menyebabkan masalah lingkungan dan kesehatan. PLTU Paiton menghasilkan 75% fly ash dan 25% bottom ash dari pembakaran 250 ton batu bara per jam, yang berdampak pada kerusakan hasil panen serta berpotensi menimbulkan masalah kesehatan. Meskipun demikian, uji karakteristik FABA menunjukkan bahwa limbah ini termasuk dalam kategori Limbah Non B3 Terdaftar dan aman digunakan sebagai pengganti semen dalam pembuatan paving block. Penggunaan FABA dalam paving block dapat meningkatkan kekuatan, mengurangi konsumsi air, dan berdampak positif bagi lingkungan. Rencana optimalisasi pemanfaatan FABA mencakup sosialisasi dan pendampingan kepada masyarakat Desa Sumberrejo untuk mengolah limbah menjadi paving block. Inisiatif ini dapat memberikan pengetahuan untuk mengatasi masalah akses jalan, meminimalisasi dampak FABA, dan meningkatkan perekonomian desa. Studi lebih lanjut diperlukan untuk memahami karakteristik FABA, terutama terkait konduktivitas panas sinar matahari. Dengan upaya ini, Badan Usaha Milik Desa Sumberrejo (BUMDes) dapat memanfaatkan limbah PLTU secara berkelanjutan, meningkatkan produktivitas, dan menjaga lingkungan serta kesehatan masyarakat.
Efek Variasi Jenis Pasir Terhadap Berat dan Kuat Tekan Beton Ringan Dari Agregat Kasar Ringan Buatan Louk Fanggi, Butje Alfonsius; Tajunnisa, Yuyun; Masrafat, Hazen; Meynerd Rafael, Jusuf Wilson
JURNAL TEKNIK SIPIL Vol 14, No 1 (2025): Volume 14 Nomor 1 Mei 2025
Publisher : Jurusan Teknik Sipil, Fakultas Teknik, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jts.v14i1.44191

Abstract

Penelitian ini bertujuan untuk menilai efek dari penggunaan campuran antara pasir sungai dan pasir ringan buatan serta pasir ringan buatan yang telah dihaluskan dalam campuran beton yang terbuat dari kerikil ringan buatan. Parameter yang ditinjau adalah adalah berat dan kuat tekan beton. Delapan belas buah benda uji dengan target kuat tekan 15, 28, dan 41 MPa dibuat dan dites pada saat berumur 28 hari. Hasil penelitian ini menunjukan bahwa beton yang dibuat dengan menggunakan pasir yang merupakan campuran antara pasir sungai dan pasir ringan buatan dapat digolongkan sebagai beton ringan. Demikian juga hasil penelitian ini menunjukan bahwa berat beton yang dibuat dengan menggunakan pasir ringan buatan tanpa dicampur dengan pasir sungai memiliki berat yang jauh lebih ringan dari beton yang terbuat dari campuran antar pasir ringan buatan dengan pasir sungai tetapi memiliki kuat tekan yang hampir menyamai beton yang menggunakan campuran antara pasir ringan buatan dan pasir sungai.
Integrasi Dakwah dan Pelayanan Kesehatan dalam Meningkatkan Kesejahteraan Jasmani dan Rohani Masyarakat Novia Martin; Zuhriana K. Yusuf; Hazen Masrafat; Ryskina Fatimah Siregar; Riska Nuryana; Jesica Mulyadi; Sulaiman Putra Nagaring
Jurnal Pengabdian Kepada Masyarakat Vol. 1 No. 3 (2026): Edisi: Mei-Juli
Publisher : Pustaka Bangsa Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Tekanan hidup modern meningkatkan kecemasan dan gangguan kesehatan masyarakat sehingga diperlukan pendekatan holistik yang memadukan penguatan spiritual dan layanan kesehatan. Kegiatan pengabdian masyarakat “Subuh Menyala Edisi Spesial Milad Muhammadiyah ke-113” bertema “Jangan Cemas, Tenang Aja” bertujuan meningkatkan kesadaran masyarakat akan pentingnya kesehatan jasmani dan rohani melalui kajian keagamaan dan layanan kesehatan gratis. Kegiatan yang dilaksanakan di Masjid Al-Muqarrabin Kota Gorontalo pada 18 Oktober 2025 ini melibatkan dosen, mahasiswa, tenaga medis, dan warga sekitar. Rangkaian kegiatan meliputi salat subuh berjamaah, kajian Islam, edukasi kesehatan, pemeriksaan kesehatan, dan konsultasi medis. Lebih dari 50 peserta mengikuti kajian, dan 37 orang menjalani pemeriksaan kesehatan. Beberapa kasus hipertensi ringan ditemukan dan langsung diberikan arahan medis. Kegiatan ini berhasil mengintegrasikan nilai keagamaan, promosi kesehatan, dan pemberdayaan masyarakat serta memperkuat kolaborasi antar lembaga akademik, sosial, dan keagamaan.
Potential of Sandless Geopolymer Concrete Bricks for Soundproof Walls Masrafat, Hazen; Nurfain, Irfan; Bayuaji, Ridho; Tajunnisa, Yuyun; Alfayet, Muhamad Rifki
Rekayasa Sipil Vol. 20 No. 2 (2026): Rekayasa Sipil Vol. 20 No. 2
Publisher : Department of Civil Engineering, Faculty of Engineering, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.rekayasasipil.2026.020.02.14

Abstract

This research explores the potential of sandless geopolymer bricks for application as soundproofing wall material. In this study, fly ash was employed as the primary binder in geopolymer concrete to substitute Portland cement, thereby reducing the environmental burden associated with conventional cement production. The geopolymer mixtures were prepared using a dry-mixing approach with varying proportions of coarse aggregate and binder. Three aggregate size ranges were investigated, namely 0.1–0.3 cm, 0.3–0.5 cm, and 0.5–1.0 cm. The performance of the resulting geopolymer concrete was evaluated through compressive strength, density, and sound transmission tests. The experimental results showed that specimens with larger aggregate sizes tended to exhibit higher compressive strength and density. In contrast, improved sound absorption was mainly associated with the development of pore structures within the material. These findings suggest that sandless geopolymer bricks have potential as an environmentally friendly material for soundproofing applications.
STUDI PERFORMA MEKANIK AWAL BETON GEOPOLIMER BERBASIS FLY ASH TIPE C DI BAWAH PAPARAN SULFAT Hazen Masrafat; Almutahir
Composite Journal Vol. 6 No. 1 (2026): Composite Journal
Publisher : Jurusan Teknik Sipil, Fakultas Teknik, Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37905/cj.v6i1.200

Abstract

This study examines the early-age sulfate resistance of Class C fly ash–based geopolymer concrete (GPC) in comparison with Portland cement concrete (PCC). The research evaluates mechanical performance, mass stability, and microstructural responses after 28 days of exposure to a 5% magnesium sulfate solution. The experimental program includes material characterization, dry-mix geopolymer preparation, sulfate immersion testing, and mechanical assessments. Chemical analysis shows that the fly ash contains 65% total pozzolanic oxides and 69.68% amorphous content, confirming its high reactivity and suitability for geopolymerization. The results indicate that GPC exhibits significantly better sulfate resistance, with a minimal mass change of only +0.03%, compared with PCC, which shows a +0.72% increase due to higher sulfate penetration. Mechanically, GPC demonstrates notable improvements: compressive strength increases by 25%, and elastic modulus rises by 9–11% after exposure. In contrast, PCC experiences only a slight increase in strength, primarily attributed to temporary pore filling from gypsum and ettringite formation rather than genuine structural enhancement. Microstructural observations confirm the presence of sulfate reaction products on both materials; however, no cracking or structural damage is detected, and GPC maintains a more stable aluminosilicate network. These findings highlight GPC’s superior early-age durability and its potential as a sustainable and chemically robust alternative to PCC in sulfate-rich environments. The study provides new experimental insights into the short-term sulfate behavior of Class C fly ash–based GPC and recommends future long-term durability evaluations under extended exposure durations and field-representative conditions.
Perilaku Teganga-Regangan Beton Ringan Densitas Rendah yang dikonfin oleh FRP Butje Alfonsius Louk Fanggi; Hazen Masrafat; Joko Suparmanto; Abdul Syukur Hadi Suwito; Indradhi Lasmana
Bentang : Jurnal Teoritis dan Terapan Bidang Rekayasa Sipil Vol 14 No 1 (2026): BENTANG Jurnal Teoritis dan Terapan Bidang Rekayasa Sipil (January 2026)
Publisher : Universitas Islam 45

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33558/bentang.v14i1.11833

Abstract

This study investigates the axial compressive behaviour of very-low-density lightweight concrete confined with fibre-reinforced polymer (FRP) jackets to improve understanding of its structural performance. The research aims to evaluate how confinement level, concrete strength, density, and fibre type influence confined strength and ductility in square sections. An experimental program was conducted using 150 mm × 150 mm × 300 mm lightweight concrete specimens with a target density of approximately 1550 kg/m³, wrapped with carbon FRP (CFRP) and glass FRP (GFRP) in two-an- three-layer configurations. Axial compression tests were used to establish stress–strain relationships and to determine key parameters, including confined strength ratio and ultimate strain ratio. The results show that FRP confinement produces substantial increases in both compressive strength and strain capacity, with fʹcu/fʹc values up to about 3.29 and εcu/εco ratios exceeding 20, confirming the high confinement efficiency attainable in very-low-density mixes. Higher strength concrete achieved greater ultimate stress but lower ultimate strain, whereas lower density concrete developed larger ultimate strains under effective jacketing. Comparisons between CFRP and GFRP revealed that, in some cases, GFRP confinement provided comparable or superior enhancement of strength and deformability, emphasising the role of material compatibility and installation quality. Overall, the findings extend the experimental database for FRP-confined lightweight concrete at densities near 1550 kg/m³ and highlight the need for refined predictive models and design provisions tailored to this density range.
Behavior of Lightweight Aggregate Concrete with FRP Confinement: Experimental Insights for Structural Applications Butje Alfonsius Louk Fanggi; Yuyun Tajunnisa; Hazen Masrafat; Jusuf Wilson Meynerd Rafael; Alva Yuventus Lukas; Niakku Immanuel Maggang; Joko Suparmanto; Melati Tabita Kirana Thei
Advance Sustainable Science Engineering and Technology Vol. 8 No. 3 (2026): May - July
Publisher : Science and Technology Research Centre Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/asset.v8i3.1650

Abstract

Lightweight aggregate concrete reduces structural dead load but generally exhibits lower compressive strength and ductility than normal-weight concrete. This study experimentally evaluates the effectiveness of carbon-fibre-reinforced polymer (CFRP) confinement for low-density lightweight aggregate concrete, an area in which data for square sections remain limited. Twelve 300-mm-high specimens with a density of approximately 1550 kg/m³ were tested under monotonic concentric compression. The investigated parameters were concrete compressive strength (15 and 28 MPa), cross-sectional shape (square and circular), and number of CFRP layers (one and two). Failure occurred through localized, extensive, or hoop rupture of the CFRP. The confined specimens exhibited approximately bilinear stress–strain responses and substantial improvements in strength and deformation capacity. For square specimens with 15 MPa concrete, two CFRP layers increased the average strength ratio to 2.27 and the strain ratio to 23.39. Circular specimens developed greater confinement efficiency, reaching an average strength ratio of 3.76 with two layers. Lower-strength concrete showed larger relative ductility gains than higher-strength concrete. These findings demonstrate that CFRP confinement can substantially reduce the brittle response of low-density lightweight concrete and support its use in lightweight, resilient, and earthquake-resistant structural applications.
Penyuluhan Keselamatan Berkendara dan Pengenalan Rambu Lalu Lintas bagi Siswa SMK Negeri 1 Suwawa Siti Nurfajrina J Patunrangi; Hazen Masrafat; Aristi Ayuningsi Ode Asri3; Muhammad Ikbal; Dwianto Dwianto
ELDIMAS: Jurnal Pengabdian Pada Masyarakat Vol 4 No 1 (2026): Mei - Oktober 2026
Publisher : Electrical Engineering Department Faculty of Engineering State University of Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37905/ejppm.v4i1.83

Abstract

Keselamatan berlalu lintas merupakan isu penting bagi pelajar, mengingat kecelakaan lalu lintas menjadi salah satu penyebab kematian tertinggi di Indonesia dan diproyeksikan menjadi penyebab kematian kelima terbesar di dunia pada tahun 2030. Di Kabupaten Bone Bolango, Provinsi Gorontalo, tercatat puluhan kasus kecelakaan pada tahun 2023, sebagian melibatkan pelajar yang masih minim pemahaman terhadap rambu-rambu lalu lintas. Kondisi ini mendorong tim dosen Jurusan Teknik Sipil Universitas Negeri Gorontalo melaksanakan kegiatan pengabdian mandiri berupa penyuluhan rambu-rambu lalu lintas bagi siswa SMK Negeri 1 Suwawa. Kegiatan dilaksanakan melalui tiga tahap, yaitu persiapan, pelaksanaan (sosialisasi interaktif, simulasi edukatif, dan pemasangan media edukasi berupa poster dan banner), serta evaluasi menggunakan pre-test dan post-test terhadap 14 siswa dengan 20 butir soal. Hasil evaluasi menunjukkan peningkatan rata-rata akurasi jawaban dari 53% pada pre-test menjadi 79% pada post-test, atau meningkat 26 poin. Peningkatan pemahaman paling menonjol terjadi pada materi fungsi rambu, tindakan berkendara saat hujan, dan keberanian menegur pelanggaran lalu lintas. Hasil ini menunjukkan bahwa metode edukasi interaktif yang dipadukan dengan media visual efektif meningkatkan pengetahuan dan kesadaran keselamatan berkendara siswa, sekaligus membuka peluang keberlanjutan program melalui kolaborasi dengan pihak sekolah dan instansi terkait.
ANALISIS PENGARUH SISTEM INFORMASI PARIWISATA TERHADAP PENINGKATAN JUMLAH WISATAWANBERBASIS DIGITAL Muhammad Safaat; Wahyuddin; Hasmina Tari Mokui; Mustarum Musaruddin; Hazen Masrafat
PROSISKO: Jurnal Pengembangan Riset dan Observasi Sistem Komputer Vol. 13 No. 2 (2026): Prosisko Vol. 13 No. 2 Juli 2026
Publisher : Pogram Studi Sistem Komputer Universitas Serang Raya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30656/2vrxdw31

Abstract

Perkembangan teknologi informasi memberikan pengaruh besar terhadap sektor pariwisata, khususnya dalam penyediaan informasi dan promosi destinasi wisata. Penelitian ini bertujuan untuk menganalisis pengaruh sistem informasi pariwisata terhadap peningkatan jumlah wisatawan berdasarkan berbagai penelitian terdahulu. Metode yang digunakan adalah literature review dengan mengumpulkan berbagai jurnal, artikel ilmiah, dan penelitian terkait sistem informasi pariwisata. Hasil penelitian menunjukkan bahwa sistem informasi pariwisata berbasis digital mampu meningkatkan jumlah wisatawan melalui kemudahan akses informasi, efektivitas promosi digital, serta perluasan jangkauan pemasaran wisata. Selain itu, kualitas informasi, tampilan website, kemudahan penggunaan, dan integrasi media sosial menjadi faktor penting dalam efektivitas sistem informasi pariwisata. Oleh karena itu, pengembangan sistem informasi pariwisata yang inovatif dan mudah diakses perlu terus ditingkatkan guna mendukung perkembangan sektor pariwisata di era digital.
Co-Authors Abdul Syukur Hadi Suwito Alfayet, Muhamad Rifki Almutahir Alva Yuventus Lukas Aristi Ayuningsi Ode Asri3 Butje Alfonsius Louk Fanggi Butje Alfonsius Louk Fanggi Cahyani, Arwinda Aribah Dwianto Dwianto Halisah, Vonny Nur Hariyanto, Ifarrel Rachmanda Hasmina Tari Mokui Indradhi Lasmana Jesica Mulyadi Joko Suparmanto Joko Suparmanto Jusuf Wilson Meynerd Rafael Louk Fanggi, Butje Alfonsius Melati Tabita Kirana Thei Meynerd Rafael, Jusuf Wilson Muhammad Ikbal Muhammad Safaat Mustarum Musaruddin Niakku Immanuel Maggang Novia Martin Nurfain, Irfan Ridho Bayuaji Riska Nuryana Ryskina Fatimah Siregar Siti Nurfajrina J Patunrangi Sulaiman Putra Nagaring Sutrisno, Wahyuniarsih Wahyuddin Wibowo, Yosi Noviari Wijaya, Aqsha Yuyun Tajunnisa Zuhriana K. Yusuf