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All Journal Semesta Teknika AGREGAT BERDIKARI : Jurnal Inovasi dan Penerapan Ipteks IEJST (Industrial Engineering Journal of the University of Sarjanawiyata Tamansiswa) Bulletin of Civil Engineering
Muhammad Heri Zulfiar, Muhammad Heri
Universitas Muhammadiyah Yogyakarta
Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Education Engineering Industrial & Manufacturing Engineering Transportation

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Journal : Semesta Teknika

 1 
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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Abstract

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

Abstract

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

Abstract

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

Abstract

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 1000ºC 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.
Co-Authors Adhianty Nurjanah Ahmad Janan Febrianto Bimo Aji, Dody Gunawan, Akhid Kusumawardana, Fernando Muhammad Azhar Muhammad Riang Endarto, Muhammad Riang Pujianto, As'at riswanto riswanto Ritonga, Mukail Syah, Sultan Agung Muhammad