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Bulletin of Civil Engineering
Published by Universitas Muhammadiyah Yogyakarta
ISSN : 27971104     EISSN : 27756351     DOI : https://doi.org/10.18196/bce
Core Subject : Engineering,
Civil Engineering, Building, Construction & Architecture
Bulletin of Civil Engineering (BCE) is an international journal of civil engineering. This journal publishes original papers on interdisciplinary theoretical and practical research related to the broad spectrum of civil engineering, encompassing all related sub-topics. The journal provides a forum for the international civil engineering community to present and discuss matters of major interest, including new developments in civil regulations. Coverage includes Structures; Geotechnics; Transportation; Environment; Earthquakes; Water Resources; Hydraulic and Hydraulic Structures; Construction Management and Materials.
Arjuna Subject : Teknik (semua kategori) - Bangunan dan Konstruksi
Articles 2 Documents
 1 
Search results for , issue "Vol 4, No 1 (2024): Februari" : 2 Documents clear
Potensi Penggunaan Abu Daun Jagung Sebagai Alternatif Pengganti Semen Pada Campuran Mortar Ramadhan, Muhammad Ernadi; Sulaiman, Lusman; Islami, Rizky Citra; Agustina, Yanida
Bulletin of Civil Engineering Vol 4, No 1 (2024): Februari
Publisher : Civil Engineering Department, Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/bce.v4i1.21324

Abstract

Semen yang digunakan pada mortar terbuat dari bahan kapur yang tidak dapat diperbaharui dan dapat menimbulkan polusi udara ketika semen diproduksi dalam jumlah besar. Oleh karena itu, bahan alternatif yang lebih ramah lingkungan sangat dibutuhkan untuk mengurangi penggunaan material semen sebagai bahan ikat. Penelitian ini bertujuan untuk mengevaluasi material abu daun jagung sebagai bahan pengganti semen pada mortar.  Variabel penelitian menggunakan empat macam variasi komposisi mortar berdasarkan jumlah semen yang diganti dengan abu daun jagung (Mortar semen, 3% abu daun jagung, 5% abu daun jagung, dan 7% abu daun jagung). Model uji diberi pengujian makroskopik (uji kuat tekan) dan mikroskopik (X-Ray Diffraction , Energy Dispersive X – Ray Spectroscopy, dan Scanning Electron Microscope). Berdasarkan pengujian yang telah dilakukan, penggunaan abu daun jagung 7% dari berat semen pada mortar menjadi variasi yang terkuat pada penelitian ini Cement used on mortar was made from limestone that cannot produced naturally, causing air pollution when it produced on big amount. Therefore, an alternative green material was very important for reducing cement utilization as bounding material. The purpose of this research was evaluating corn leaves ash material as cement substitute on mortar.The research variables were using four different mortar composition based on cement amount which replaced by corn leaves ash(Cement mortar, 3% corn leaves ash, 5%  corn leaves ash , and 7%  corn leaves ash). The samples were tested by macroscopic method (compression test) and microscopic method ( X-Ray Diffraction , Energy Dispersive X – Ray Spectroscopy, and Scanning Electron Microscope ). Based on the test, the substitution of 7% corn leaves ash from cement on mortar became the strongest variation on this research
Risiko Kerugian Mutu Pekerjaan Konstruksi Pada Pembangunan Gedung Sekolah 4 Lantai Zulfiar, Muhammad Heri; Kusumawardana, Fernando
Bulletin of Civil Engineering Vol 4, No 1 (2024): Februari
Publisher : Civil Engineering Department, Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/bce.v4i1.21901

Abstract

Pada umumnya tolak ukur keberhasilan proyek dinilai berdasarkan waktu penyelesaiannya yang singkat dengan pengeluaran biaya yang seminiminal mungkin. Berdasarkan hal-hal tersebut, maka penelitian lebih mengenai faktor-faktor yang memiliki potensi kerugian pekerjaan pada proyek pembangunan Gedung sekolah empat lantai yang berlokasi di Bantul. Penelitian ini dilakukan berdasarkan penyebaran kuisioner serta wawancara langsung dengan pihak terkait didalam proyek agar didapatkan nilai risiko dengan pendekatan risk = event x impact, yang kemudian dituangkan dalam matriks resiko AS/NZS 4360. Penelitian ini menggunakan metode Work Breakdown Structure (WBS) untuk memecah proyek secara sistematis dan logis menjadi komponen- komponennya.  Hasil penelitian ini menunjukkan bahwa pada pekerjaan struktur bawah yang mencakup pondasi footplate/ cakar ayam, struktur kolom, dan struktur balok memiliki tingkat resiko rendah dengan rata-rata sebesar 4,06. Faktor kerugian yang sering terjadi adalahpadapekerjaan bekisting plat lantai, penulangan balok dan pekerjaan bekisting balok.In general, the benchmark for project success is usually assessed based on a short completion time with minimal costs incurred. Based on these things, further research is needed  regarding the factors that have the potential for job losses in the four-story school building construction project located in the Building Construction of Al – Azhar 66 Islamic Junior High School in Bantul. This research was carried out based on distributing questionnaires and direct interviews with related parties in the project in order to obtain risk values using the risk = event x impact approach, which was then outlined in the AS/NZS 4360 risk matrix. This research applied Work Breakdown Structure (WBS) method to identify every component in the construction work. Results of this structure showed that footplate, column, and beam construction have low risk of quality loss with the 4.06 of average value. Loss factors often occur in floor formwork, beam reinforcement and beam formwork.

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