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Kajian Eksperimen Kuat Tekan Beton Ringan Menggunakan Agregat Bambu dan Bahan Tambah Beton Endarto, Muhammad Riang; Zulfiar, Muhammad Heri
Jurnal Semesta Teknika Vol 13, No 1 (2010): MEI 2010
Publisher : Jurnal Semesta Teknika

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The use bamboo as a substitute aggregate is an effort to reduce the density and static load of structural elements. This reseach focuses on the problem related to the specific gravity and compressive strength of the use of bamboo as a lightweight concrete aggregate. Specimens were produced using additive and 10 mm maximum grain size of bamboo agregate as a substitute for split aggregate, in a lightweight concrete composite systems. Variation of bamboo content as a substitute aggregate were selected being 0% (normal), 20%, 40%, 60%, 80% and 100% by weight of split aggregate. The samples are in the form of cylinder (of 15 cm diameter and 30 cm height), while the compression testing were performed after 14 days of treatment. The results showed that the lightweight concrete containing 80% of bamboo aggregate possessing compressive strength 5,86 MPa, which is below the minimum standard of ACI of 17,2 MPa.

Pemeriksaan Material pada Pembangunan Rumah Non-Engineered di Daerah Rawan Gempa Dusun Serut, Palbapang Kabupaten Bantul, Yogyakarta Zulfiar, Muhammad Heri
Semesta Teknika Vol 21, No 2 (2018): NOVEMBER 2018
Publisher : Semesta Teknika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/st.212224

Bantul Regency is a region with high level of seismic activity in Indonesia. Buildings that have the highest risk of collapse to earthquake are non-engineered buildings or residential buildings built without planning or not according regulation. This study aims to know contruction practices and material examination on non-engineered buildings in earthquake prone areas in accordance with the Indonesian National Standard. The object research is the construction of non-engineered building in Serut Village, Palbapang, Bantul Regency. The testing of material construction materials include: concrete test, reinforcing steel test and bricks test. the material are tested on the laboratory of Universitas Muhammadiyah Yogyakarta. The observations and measurements to the practices of construction consist of: concrete sloof with size 15 × 20 cm with the main reinforcement 4Ø12 and beugel reinforcement Ø6-150; column with size 10 × 15 cm with main reinforcement 4Ø10 and beugel reinforcement Ø6-150; the concrete mixture is made manually with a composition 1 cement: 3 sand: 2 gravel; Brick size 4.35 cm x 12.036 cm x 23.902 cm class criteria M-6 module. Laboratory material test results showed: steel reinforcement diameter Ø 10 mm obtained tensile strength (fy) 401.52 Mpa; Ø12 mm diameter obtained tensile strength (fy) 393,736 M.Pa; concrete have average compressive strength of 181 kg/cm2; brick test have average compressive strength of 20.03 kg/cm2. The conclusion of contruction practices on non-engineered buildings in earthquake prone areas are adequate on major earthquake, the quality of construction concrete and reinforcing steel are fulfilling the criteria and requirements of the Indonesian National Standard, but quality of material brick is not adequate standar.

Evaluasi Sistem Proteksi Kebakaran pada Bangunan Hotel UNY 5 Lantai Di Yogyakarta Zulfiar, Muhammad Heri; Gunawan, Akhid
Semesta Teknika Vol 21, No 1 (2018): MEI 2018
Publisher : Semesta Teknika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/st.211212

Fire is an event that causes many losses. Fire in multi-storey buildings will cause many losses. Some fire events in comersial multi-storey buildings can be used to be mitigation reference to decrease fire risk. Hotel is one of comersial buildings that has a safety standard to the occupants. One of the protection form is making protection for fire hazard. This research is conducted at UNY Hotel located at Karangmalang Street Caturtunggal Depok Sleman Yogyakarta. By this research, hopefully UNY Hotel can be the reference of fire protection system for the others comersial buildings in Yogyakarta.The purpose of this research is to assess the completeness of facilities and infrastructure of fire protection system that available at UNY Hotel. The method is by observation process and assessment of 4 parameters of reliability of building safety system, that are site completeness, rescue device, active protection, and passive protection with reference to Regulation of Minister of Public Works Number 26/PRT/M/2008 about Technical Requirement of Protection System Fire on Building and Environment Building and Fire Safety Building Inspection Guidebook (Pd-T-11-2005-C) from Research and Development Agency of Ministry of Public Works and several related Indonesian National Standards.The results of the Reliability Building Safety System is 91,60 which means the value of the reliability of the building at UNY Hotel is good. So, UNY Hotel building can be used optimally and building users get protection from fire building hazard.

Evaluasi Beton Bertulang terhadap Perlakuan Panas (Tinjauan pada Tegangan Tarik dan Modulus Elastis Tulangan Baja Lateral) Riswanto, Riswanto; Pujianto, As'at; Zulfiar, Muhammad Heri
Semesta Teknika Vol 16, No 2 (2013): NOVEMBER 2013
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/st.v16i2.4908

Fires phenomena have made demands to a building planner to protect, evaluate, and predict the performance of a building after a fires process. The main attention was given to the type of material, in this case, the reinforced concrete that used as a structural element, which due to heating and cooling cycles are alternating, and then the elements of reinforced concrete structures undergo a phase change both in the physical and chemical. This research related to the evaluation of reinforced concrete quality with a focus on heat treatment and reviews tensile stress and elastic modulus of the steel reinforcement. Specimens used in this study was a model of the reinforced concrete beam with a concrete cover types K250 and K300, 7.5 mm of rebar diameter and 2 cm of concrete cover thickness. Heat testing performed after 28 days of treatment with closed combustion in the furnace (heat chamber) without loading at a temperature of 1000ÂºC for 10 hours, holding time for 1 hour, and slows cooling for 10 hours. In normal specimens, the tensile test results show an equivalent stress value of 324.12 MPa. In specimens heat treatment with a concrete cover of K250, the tensile stress value was 259.52 MPa, while in the K300 was 263.76 MPa. Optimum tensile stress value in normal specimens was 568.62 MPa, and in specimens with heat treatment and with the K250 concrete cover was 473.74 MPa and amounted to 494.41 MPa for K300. The value of tensile fracture stress in normal specimens amounted to 552.52 MPa, and in specimens with heat treatment and with the K250 concrete cover amounted to 461.52 MPa and amounted to 465.24 MPa for K300. Elastic modulus values for normal specimen was 1,612,963.61 kg/cm2, while in specimen heat treatment with the K250 concrete cover was 1,287,888.05 kg/cm2 and was 1,311,545.42 kg/cm2 for K300.

Edukasi Pengelolaan Sampah Rumah Tangga Bagi Pendidkan Anak Usia Dini Zulfiar, Muhammad Heri; Nurjanah, Adhianty; Azhar, Muhammad; Ritonga, Mukail
Berdikari: Jurnal Inovasi dan Penerapan Ipteks Vol 11, No 2 (2023): August
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/berdikari.v11i2.19264

Waste is a complex and integrated problem at the upstream, service, and downstream levels. Each stage has different problems despite being inseparable. The problem is that the volume of waste reaches 100 fleets per day, carrying a supply of approximately 600 tons of waste. There is limited land for waste disposal in Yogyakarta, and the main access is a disposal route that causes air and water pollution, not to mention the problem of handling waste at landfills in terms of technical or technological. Households as waste producers (upstream), it is time not only to supply waste, but from this stage, the waste begins to be managed so that it does not accumulate in landfills. One of these efforts is the need for social engineering to change societal behavior. This mentoring activity in Serut Hamlet, Palbapang, is a miniature in handling changes in community behavior to become aware of waste. The service aims to provide awareness and understanding in managing household waste (upstream) through education. The method was to create collaboration between local institutions, specifically the Azola Waste Bank group representing waste activists with Early Childhood Education so that they can be synergistic and collaborative in changing community behavior through roles and examples among parents of students. These activities start from the stage of sorting waste from the kitchen. Then, the waste is taken to the school and collected by the waste bank, teaching the technological transformation of the use and processing of waste recycling for parents and bringing up an SPS PAUD curriculum about waste. The activity results show that public awareness and understanding of household waste management have been built. The activity patterns can provide education to students.

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

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.

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

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.

Manajemen Resiko Lingkungan Pada Proyek Gedung Sekolah Zulfiar, Muhammad Heri; Syah, Sultan Agung Muhammad
AGREGAT Vol 10 No 1 (2025)
Publisher : Universitas Muhammadiyah Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30651/ag.v10i1.26324

Pembangunan di Indonesia meningkat seiring meningkatnya jumlah dan kebutuhan penduduk. Terdapat banyak resiko yang terjadi selama pembangunan proyek salah satunya resiko yang terjadi pada lingkungan. Semakin besar skala proyek yang dikerjakan maka berbanding lurus dengan resiko yang dihadapi. Untuk mengatasi dan meminimalisir resiko tersebut maka diperlukan penilaian dan pengendalian pada proyek tersebut. Dalam penelitian ini dilakukan pengumpulan data dengan metode kuisioner yang diberikan kepada pihak yang terlibat pada pembangunan gedung sekolah di Bantul. Adapun data tersebut kemudian diolah dengan mengacu pada matriks resiko. Berdasarkan hasil analisis yang dilakukan, pelaksanaan prosedur pengendalian resiko lingkungan telah dilaksanakan dengan baik. Kesimpulan dari penelitian ini terdapat empat kategori pekerjaan yang diperoleh nilai sebesar 4,1 dengan kategori resiko rendah. Kemudian pada pekerjaan persiapan memperoleh angka sebesar 4,09 dengan kategori resiko tingkat rendah. Pada pekerjaan penggalian sebesar 5,00 dengan kategori resiko tingkat rendah. Pada pekerjaan pengaturan lalu lintas sebesar 3,19 dengan kategori resiko tingkat rendah. Pada pekerjaan struktur sebesar 4,12 dengan kategori resiko tingkat rendah.

Development of a Portable Disaster Evacuation Simulation Tool for Elementary Schools Using Quality Function Deployment (QFD) Febrianto, Ahmad Janan; Aji, Dody Bimo; Zulfiar, Muhammad Heri
INDUSTRIAL ENGINEERING JOURNAL of the UNIVERSITY of SARJANAWIYATA TAMANSISWA Vol 8 No 2 (2024)
Publisher : Universitas Sarjanawiyata Tamansiswa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30738/iejst.v8i2.0240202

This study presents the development of an interactive, portable disaster evacuation simulation tool for elementary school students using the Quality Function Deployment (QFD) method. The tool aims to enhance student's ability to memorize and recall evacuation routes through hands-on learning and interactive play. Conducted as a case study in a private elementary school in Bantul, Yogyakarta, this research integrates the House of Quality (HoQ) framework to align technical specifications with educators' requirements. The simulation tool is designed as a modular labyrinth-style board that mimics the school's disaster evacuation map, allowing students to actively reconstruct escape routes and improve their spatial awareness and disaster preparedness. Findings reveal that the interactive and adaptable nature of the tool significantly improves students' understanding of evacuation procedures compared to traditional static evacuation maps. Additionally, the tool's portability and customizable design accommodate annual changes in school infrastructure, ensuring long-term usability and scalability. This study highlights the importance of incorporating game-based learning and interactive disaster education strategies into school curricula, promoting engaged learning and better emergency preparedness among young learners.

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