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All Journal Borneo Engineering: Jurnal Teknik Sipil REKONSTRUKSI TADULAKO: Civil Engineering Journal on Research and Development Jurnal Konstruksi Paulus Civil Engineering Journal MILRev: Metro Islamic Law Review Jurnal Surya Teknika
Sri Nur Akifa
Universitas Tadulako
Religion Humanities Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Engineering Environmental Science Law, Crime, Criminology & Criminal Justice Social Sciences Transportation

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Kajian Perubahan Pola Transportasi Sedimen Pesisir Pascagempa 2018 terhadap Fasilitas Tambatan Perahu di Teluk Palu Mantong, Tiffani Mandasari Putri; Tiffani Mandasari Putri, Mantong; Karuru, Rezky Susmono; Akifa, Sri Nur; Ramadhan, Bayu Rahmat; Wahidin, Suci Amalia Namira
Paulus Civil Engineering Journal Vol. 8 No. 2 (2026): Paulus Civil Engineering Journal, Juni 2026
Publisher : Universitas Kristen Indonesia Paulus

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52722/antvrd93

Abstract

Gempa bumi dan tsunami yang terjadi di Teluk Palu pada tahun 2018 menyebabkan perubahan morfologi dasar laut yang berpotensi mempengaruhi dinamika hidrodinamika serta transport sedimen di wilayah pesisir. Penelitian ini bertujuan untuk menganalisis perubahan pola transport sedimen pascabencana serta implikasinya terhadap kondisi pesisir dan fasilitas tambatan perahu di Pantai Talise, Teluk Palu. Metode penelitian dilakukan melalui pemodelan numerik hidrodinamika dan transport sedimen untuk memperoleh distribusi kecepatan arus, perubahan elevasi dasar laut (bed level change), serta perubahan garis pantai (shoreline change). Hasil simulasi menunjukkan bahwa kecepatan arus di wilayah kajian berkisar antara 0,002–0,018 m/s. Variasi nilai bed level change menunjukkan terjadinya proses erosi dan sedimentasi pada beberapa lokasi pengamatan. Hasil simulasi juga menunjukkan dominasi proses akresi di sepanjang Pantai Talise yang mengindikasikan adanya akumulasi sedimen di wilayah pesisir. Kondisi ini dapat meningkatkan stabilitas garis pantai, namun dalam jangka panjang berpotensi menyebabkan pendangkalan pada perairan dangkal di sekitar tambatan perahu. Selain dipengaruhi oleh perubahan batimetri akibat tsunami, dinamika transport sedimen di wilayah kajian juga dipengaruhi oleh keberadaan struktur pelindung pantai seperti revetment yang dapat mengubah distribusi energi gelombang dan pola sedimentasi.
Pengaruh Komposisi Campuran Multi-Variabel terhadap Kuat Tekan Mortar Geopolimer Fly Ash-GGBFS Novacharisma Vindiantri Verucha; Bayu Rahmat Ramadhan; Rezky Susmono Karuru; Sri Nur Akifa; Misel Boro Allo
Jurnal Konstruksi Vol 24 No 1 (2026): Jurnal Konstruksi
Publisher : Institut Teknologi Garut

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33364/konstruksi/v.24-1.3366

Abstract

Growing interest in sustainable construction materials has driven the utilization of industrial by-products, such as fly ash, as alternatives to Portland cement. However, Type F fly ash typically exhibits low calcium (CaO) content, resulting in slow geopolymerization and limited strength development under ambient curing conditions. This study investigates the combined influence of Ground Granulated Blast Furnace Slag (GGBFS) incorporation and multi-variable mix composition on the compressive strength development of fly ash-based geopolymer mortar.An experimental program based on a Taguchi L9 design was employed to systematically evaluate the effects of GGBFS content (0%, 10%, 20%, and 30%), activator-to-binder ratios (0.30, 0.35, and 0.40), and aggregate-to-binder ratios (2.25, 2.50, and 2.75). Compressive strength was measured at 7, 14, and 28 days under ambient curing conditions and compared with conventional Portland cement mortar. The results indicate that GGBFS plays a dominant role in enhancing strength development by promoting the formation of hybrid C–A–S–H and N–A–S–H gels, which densify the microstructure and accelerate reaction kinetics.The fly ash-only mixture exhibited very low strength (0.82 MPa at 28 days), while mixtures incorporating GGBFS showed significant improvement. The optimal composition (D40G30A2.5) achieved a compressive strength of 28.81 MPa at 28 days, exceeding the Portland cement control (16.75 MPa). Statistical analysis further confirms that GGBFS content is the most influential parameter governing strength development, followed by activator dosage, while aggregate proportion has a relatively minor effect. This study contributes a systematic multi-parameter optimization framework for ambient-cured fly ash–GGBFS geopolymer mortar, demonstrating that 20–30% GGBFS incorporation enables practical strength development without the need for elevated temperature curing, thereby enhancing its applicability for real-world construction.
Co-Authors Adam, A.A. Andi Arham Adam Ani Susanti Arief Setiawan Bayu Rahmat Ramadhan Bayu Rahmat Ramadhan Boroallo Seril Dandan Haryono Irwan Waris Lilis Deviana Lonardya, C.J. Mantong, Tiffani Mandasari Putri Medi Tikara Misel Boro Allo Moh. Iqbal Rasyid Nirmalawati Novacharisma V. Verucha Payung, F.R. Rasyid, Moh. Iqbal Ratmadi Payung, Fritswel Rezky Susmono Karuru Said, Sugira Seril, Boroallo Suci Amalia Namira Wahidin Sugira Said Tiffani Mandasari Putri, Mantong Verucha, Novacharisma V. Verucha, Novacharisma Vindiantri Wahidin, Suci Amalia Namira William Arrang Sarungallo