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All Journal JeLAST : Jurnal Teknik Kelautan , PWK , Sipil, dan Tambang Jurnal Teknik Sipil Journal of Mathematical and Fundamental Sciences Journal of Engineering and Technological Sciences Tasyri` : Jurnal Tarbiyah-Syari`ah-Islamiyah Portal: Jurnal Teknik Sipil Chalim Journal of Teaching and Learning Realism: Law Review ILJ: Islamic Learning Journal
Herwani .
JurusanTeknik Sipil Universitas Tanjungpura, Pontianak
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Journal : Jurnal Teknik Sipil

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Investigation of Epoxy Resin Effect as Additional Component on the Mechanical Properties of Polymer Concrete Kardianto, Arie; Elvira, Elvira; Herwani, Herwani; Nurhayati, Nurhayati
Jurnal Teknik Sipil Vol 25, No 3 (2025): Vol 25, No 3 (2025): JURNAL TEKNIK SIPIL EDISI AGUSTUS 2025
Publisher : Fakultas Teknik Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/jts.v25i3.92762

Abstract

This research investigates the mechanical properties of polymer concrete, a composite material composed of varying proportions of epoxy resin, sand, and crushed stone. A total of 76 cylindrical specimens were prepared and tested for compressive strength, split tensile strength, and elastic modulus over curing durations of 1, 2, 7, and 14 days. The results indicated that the highest compressive strength of 44.78 MPa was achieved by a specimen with 34% epoxy resin and 66% crushed stone after 1 day of curing. In contrast, the lowest strength was found in mixtures with high sand content and lower resin proportions. The split tensile strength increased with the addition of crushed stone, reaching a peak value of 1.69 MPa at 14 days. Furthermore, the elastic modulus improved as the coarse aggregate content increased, with a maximum value of 4,538.50 MPa. These findings highlight the potential of epoxy-based polymer concrete as a viable alternative to conventional cement concrete, particularly for rapid-strength applications. The results also provide a foundation for optimizing mixture design in structural applications, contributing to the development of high-performance composite materials in civil engineering.
Experimental Study on the Effect of Aggregate Content on the Compressive Strength of Fly Ash-based Geopolymer Concrete Z, Yosafat; Herwani, Herwani; Faisal, Faisal
Jurnal Teknik Sipil Vol 25, No 3 (2025): Vol 25, No 3 (2025): JURNAL TEKNIK SIPIL EDISI AGUSTUS 2025
Publisher : Fakultas Teknik Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/jts.v25i3.89866

Abstract

The production process of Portland cement causes air pollution by releasing carbon dioxide into the air, contributing to the greenhouse effect. In an effort to reduce cement usage, researchers are seeking more environmentally friendly materials, such as fly ash a byproduct of coal combustion as an alternative to cement. In this study, fly ash is used to replace cement in geopolymer concrete. The method used in this research is the experimental method, involving the creation of test specimens to examine physical and mechanical properties, including material analysis, specimen preparation, curing, compressive strength testing, split tensile strength, and modulus of elasticity. The study results show that the average bulk density ranges from 2,206.949 kg/m ³ to 2,313.052 kg/m ³, the average compressive strength ranges from 8.913 MPa to 15.915 MPa, the average split tensile strength ranges from 0.943 MPa to 1.368 MPa, and the average modulus of elasticity ranges from 2,186.062 MPa to 3,644.775 MPa. The best variation was found in geopolymer concrete with 60% fine aggregate content, achieving an average compressive strength of 15.915 MPa at 28 days. The study concludes that fly ash has strong potential to replace cement as the main component in concrete.
Experimental Study on the Effect of Heating Duration on Compressive Strength of Fly Ash-Based Geopolymer Concrete from Bengkayang Power Plant Mahazir, Muhamad; Herwani, Herwani; Faisal, Faisal
Jurnal Teknik Sipil Vol 25, No 1 (2025): Vol 25, No 1 (2025): JURNAL TEKNIK SIPIL EDISI FEBRUARI 2025
Publisher : Fakultas Teknik Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/jts.v25i1.88386

Abstract

Geopolymer concrete is an innovative construction material developed as an alternative to Portland cement. First introduced by Davidovits in 1978, geopolymer exhibits a chemical composition similar to zeolite but with an amorphous microstructure. One of its most significant advantages is its ability to reduce carbon dioxide emissions by approximately 80% compared to conventional concrete, making it a promising solution for mitigating the environmental impact of the cement industry. This study explores the utilization of coal-fired power plant waste to develop geopolymer concrete with varying heating durations, aiming to create a more environmentally friendly alternative that reduces pollution and lowers COâ‚‚ emissions from cement production. The experimental process involved producing test specimens using fly ash, NaOH, Naâ‚‚SiO₃, fine aggregates, and coarse aggregates, followed by mechanical property evaluations, including compressive strength, splitting tensile strength, and elastic modulus tests. The results demonstrated an average density ranging from 2,238.780 kg/m ³ to 2,323.662 kg/m ³, an average 28-day compressive strength between 15.279 MPa and 16.977 MPa, an average splitting tensile strength ranging from 1.320 MPa to 1.627 MPa, and an average elastic modulus (Chord Modulus method) between 2,838.251 MPa and 3,631.342 MPa. The optimal heating duration was identified as 24 hours, producing the highest 28-day compressive strength of 16.977 MPa. These findings confirm that fly ash is a viable substitute for cement in construction applications, offering a sustainable and eco-friendly alternative to traditional concrete.
STUDI KOEFISIEN KUAT TEKAN BETON GEOPOLIMER PADA BERBAGAI UMUR Aryanto, Aryanto; Faisal, -; Sutandar, Erwin; Herwani, -
Jurnal Teknik Sipil Vol 21, No 2 (2021): JURNAL TEKNIK SIPIL EDISI DESEMBER 2021
Publisher : Fakultas Teknik Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/jtst.v21i2.50662

Abstract

Paper ini menyajikan hasil penelitian secara eksperimental mengenai pemanfaatan limbah pembakaran batubara pembangkit listrik tenaga uap (PLTU) Suralaya berupa fly ash. Material ini digunakan sebagai bahan dasar pembuatan beton Geopolimer. Pengaruh molaritas larutan alkali activator terhadap kuat tekan beton yang dihasilkan dipelajari dalam riset ini. Penggunaan larutan sodium silikat dan sodium hidroksida dipilih sebagai larutan aktivatornya. Molaritas larutan sodium hidroksida yang digunakan adalah   10 M, 12 M dan 14 M. Benda uji dibuat berupa silinder beton berdiameter 10 cm dengan tinggi 20 cm sebanyak 3 buah setiap variabel sehingga total benda uji adalah 27 buah. Perawatan benda uji dilakukan pada suhu ruang dengan ditutup plastik untuk menghindari penguapan pada benda uji. Pembahasan di fokuskan pada koefisien kuat tekan beton geopolimer umur 7 dan 14 hari terhadap umur 28 hari.   Dari hasil analisa diketahui koefisien kuat tekan beton geopolimer diperoleh berturut-turut 65.5 %, 84.8%, dan 100% untuk Beton NaOH 10 M. Kemudian beton dengan konsentrasi larutan sodium hidroksida (NaOH) 12 M berturut-turut 49.8 %, 80.4%, dan 100%. Selanjutnya capaian kuat tekan beton dengan konsentrasi NaOH 14 M pada umur 7, 14, dan 28 hari terhadap kuat tekan umur 28 hari berturut-turut adalah 59.6 %, 88.5%, dan 100%.
COST ANALYSIS OF SUSPENSION BRIDGE CONSTRUCTION IN KALIMANTAN BARAT PROVINCE Yasin, Usman; Elvira, Elvira; Lusiana, Lusiana; Herwani, Herwani
Jurnal Teknik Sipil Vol 24, No 1 (2024): Vol 24, No 1 (2024): JURNAL TEKNIK SIPIL EDISI FEBRUARI 2024
Publisher : Fakultas Teknik Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/jts.v24i1.72224

Abstract

The successful implementation of a job begins with the determination of a reliable estimation value. One of the models used in determining the estimated value of a job, using data from the cost budget plan (RAB) on work that has been carried out, is the Cost Significant Model.   In this study, the data used were five suspension bridge construction jobs starting from 2018 to 2022. the data obtained from the RAB is processed into independent variables and dependent variables, which are then tested using multiple linear regression methods using the SPSS application. Based on the results of the analysis, the influential variables are X2, namely Bridge Oprit Work; X4, namely Upper Building Work (Transportation and Installation of Truss Bridges); and X5, namely Lower Building Work (Angkur Block Work, Pyilon Foundations, Wind Ties) with a total weight of 85.30%.   By using the equation Y = -21,640,343,680,000 + (1,856,843,372 x X2) + (453,953,095 x X4) + (41,965,201,370 x X5), the maximum value of 62.21% and minimum value of -98.05% are obtained, so it falls into the Class 5 category. Class 5 has an accuracy value ranging from +30% to +100%, so it is estimated that it is feasible to use it to carry out the initial concept screening estimation.
Impact of Activator Ratio on Fly Ash-Based Geopolymer Concrete Ramadhany, Ajmal; Herwani, Herwani; Faisal, Faisal
Jurnal Teknik Sipil Vol 25, No 1 (2025): Vol 25, No 1 (2025): JURNAL TEKNIK SIPIL EDISI FEBRUARI 2025
Publisher : Fakultas Teknik Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/jts.v25i1.88511

Abstract

Geopolymer concrete is made by activating raw materials high in silica and alumina using alkaline activators. This material substitutes conventional Portland cement concrete by incorporating industrial waste materials like fly ash or metakaolin, which are recognized for reduced carbon emissions and superior chemical resistance. This study experimentally investigates the effect of the activator ratio (NaOH/Na₂SiO₃) on the alkali-silica reaction and the mechanical properties of geopolymer concrete made from fly ash, aiming to optimize the performance of this sustainable construction material. The experiment assesses various parameters, such as slump, volume weight, compressive strength, splitting tensile strength, and elastic modulus, using a constant 10M molar concentration for the activator solution with activator ratios of 1/2, 1/3, 1/4, and 1/5. The specimens used for the tests were cylindrical, measuring 10 cm x 20 cm for compressive strength tests and 15 cm x 30 cm for tests on split tensile strength and elastic modulus. Compressive strength was tested at 7, 14, and 28 days, while split tensile strength and elastic modulus were tested at 28 days. Results announced that increasing the Na₂SiO₃ concentration in the activator solution significantly affected the properties of geopolymer concrete. The optimal NaOH/Na₂SiO₃ ratio was found to be 1/5.
Experimental Study of The Effect of Activator Molarity on The Compressive Strength of Fly Ash-Based Geopolymer Concrete from Bengkayang Regency Power Plant Faraid, Luthi Armey; Herwani, Herwani; Faisal, Faisal; Parabi, Ashraf Dhowian
Jurnal Teknik Sipil Vol 24, No 4 (2024): Vol 24, No 4 (2024): JURNAL TEKNIK SIPIL EDISI NOVEMBER 2024
Publisher : Fakultas Teknik Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/jts.v24i4.88329

Abstract

Geopolymer concrete is a form of concrete where Portland cement is substituted with alternative materials like fly ash, rice husk ash, and other silica- and aluminum-rich sources as binders. The research employed an experimental method by preparing geopolymer concrete test specimens using fly ash, NaOH solution, Naâ‚‚SiO₃, fine aggregate, and coarse aggregate. Tests conducted included physical properties (slump test and unit weight) and mechanical properties (compressive strength, split tensile strength, and modulus of elasticity). The results showed a slump range of 130"“190 mm, an average unit weight between 2249.39 kg/m ³ and 2336.39 kg/m ³, a 28-day average compressive strength between 12.32 MPa and 15.92 MPa, an average split tensile strength between 1.46 MPa and 1.56 MPa, and an average modulus of elasticity (Chord Modulus) between 3011.67 MPa and 3881.8 MPa. The optimal variation was achieved with an NaOH solution concentration of 10 M, resulting in a slump of 160 mm, a 28-day average compressive strength of 15.92 MPa, an average split tensile strength of 1.56 MPa, and an average modulus of elasticity (Chord Modulus) of 3881.48 MPa. Therefore, fly ash-based geopolymer concrete demonstrates potential as a viable substitute for cement as a binder material.
CALCULATION OF EARTHQUAKE RESISTANT STRUCTURE OF MEDICAL CENTER BUILDING RUMAH SAKIT UMUM DAERAH (RSUD) SOEDARSO PONTIANAK USING PUSHOVER ANALYSIS Sutiono, Tansetiadi; Budi, Gatot Setya; Herwani, Herwani
Jurnal Teknik Sipil Vol 23, No 3 (2023): JURNAL TEKNIK SIPIL EDISI AGUSTUS 2023
Publisher : Fakultas Teknik Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/jts.v23i3.67754

Abstract

Hospitals are essential in providing health services and must withstand the forces that may occur, even due to an earthquake. RSUD Soedarso is a hospital in Pontianak City that has been around for a long time. However, because it is already quite old, various problems must be addressed. The step taken by the government is to build a new building, namely the Medical Centre and Inpatient Building.The purpose of writing this final project is to evaluate the performance of the earthquake-resistant structure of the Soedarso Hospital Medical Centre building using the pushover analysis method. This method analyses the inelastic behaviour of the system due to the earthquake, where the result is a curve of the relationship between the shear force and the displacement of the roof that occurs. The guidelines for pushover rules used are based on the provisions of ATC-40 and FEMA 356. Further research was carried out on the dilation between the Medical Centre Building and the IRNA Building.The results are that both buildings are still in elastic condition when the performance point is reached. Based on ATC-40 and FEMA 356, the building is classified as in the Immediate Occupancy (IO) performance level, regarding drift ratio and from plastic hinges that occur in column and beam elements. Then the dilatation that arises due to pushover is smaller than the design dilation of 150 mm. Both buildings are protected from potential collisions, which is a relief.
Effect of Curing Temperature on Mechanical Properties of Fly Ash-Based Geopolymer Concrete from Bengkayang Power Plant Syavanka, Lucky Nur; Herwani, Herwani; Faisal, Faisal
Jurnal Teknik Sipil Vol 25, No 1 (2025): Vol 25, No 1 (2025): JURNAL TEKNIK SIPIL EDISI FEBRUARI 2025
Publisher : Fakultas Teknik Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/jts.v25i1.88504

Abstract

The production of portland cement generates carbon dioxide emissions, which contribute to environmental degradation. To address this issue, researchers have explored the use of coal waste, such as fly ash, as a partial replacement for cement. This research investigates the potential of fly ash as a substitute in the production of geopolymer concrete. The research follows an experimental approach involving the fabrication of test specimens to evaluate the concrete's mechanical properties. The process encompasses material analysis, specimen preparation, curing, and testing for volume weight, compressive strength, split tensile strength, and elasticity modulus. The findings reveal that the volume weight values range between 2.260,000 kg/m ³ and 2.336,395 kg/m ³, while compressive strength varies from 10,152 MPa to 16,994 MPa. Additionally, the split tensile strength falls within 1,415 MPa to 1,556 MPa, and the elasticity modulus spans from 2.727,352 MPa to 3.325,204 MPa. The results emphasize the significant influence of temperature variations on the mechanical performance of geopolymer concrete, with 60 °C identified as the optimal curing temperature for achieving the highest compressive strength, split tensile strength, and elasticity modulus.
DESIGN OF REINFORCED CONCRETE STRUCTURE WITH ORDINARY MOMENT FRAME IN LOW SEISMIC REGION (CASE STUDY: MIDRISE SHOPPING BUILDING IN SINGKAWANG CITY) Zulshaec, Yongga; Herwani, Herwani; Yusuf, Muhammad
Jurnal Teknik Sipil Vol 24, No 1 (2024): Vol 24, No 1 (2024): JURNAL TEKNIK SIPIL EDISI FEBRUARI 2024
Publisher : Fakultas Teknik Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/jts.v24i1.75755

Abstract

This paper focuses on the design of a reinforced concrete structure for an eight-story shopping building in Singkawang City, located in a low to moderate seismic area. The study integrates relevant design considerations in response to the region's seismic conditions. Through structural analysis, the building is categorized as seismic design category B due to moderate seismic risk, leading to the selection of an ordinary moment-resisting frame system compliant with SNI 1726:2019. Emphasis is placed on the importance of using such a system to enhance ductility and prevent brittleness during earthquakes.The research emphasizes the need to design structures capable of withstanding various loads, including dead, superimposed dead, live, wind, and earthquake loads, particularly in West Kalimantan, known for its historically low to moderate seismic activity. Recent earthquake records highlight the necessity of earthquake-resistant design for safety and durability. Structural analysis confirms the building's stability against seismic forces, with a modal participation ratio meeting SNI 1726:2019 requirements, indicating robust response under seismic loads.The study also assesses inter-story drift and P-Delta effects to ensure they meet allowable limits, which is crucial for preserving structural integrity and preventing post-earthquake instability. A detailed reinforcement design following SNI 2847:2019 enhances structural strength and durability, especially when under seismic loading. The foundation design uses tailored hollow spun piles to provide sufficient bearing capacity and stability. This approach demonstrates resilience against potential seismic events in low-to-moderate seismic regions, highlighting the importance of integrating seismic design principles and ductility considerations for effective earthquake hazard mitigation.
Co-Authors - Faisal, - ., Jeprianto Ali Akbar Andreas, Ricky Arfan ., Arfan Aryanto Aryanto Asep Supriyadi B. Budiono Bambang Budiono Bambang Budiono Bayu Emilsyah Bin Ilias, Mohd. Faeez Cek Putra Handalan, Cek Putra Chrisna Djaya Mungok Crisna Djaya Mungok DWI SANTOSO Ediansjah Zulkifli Eka Priadi Elsa Tri Mukti Elvira . Elvira Elvira Erwin Sutandar Faisal Faisal Faraid, Luthi Armey Fitrahaldi, Naufal Gagas Bagus Pradewa Hermanus, Hermanus Hutajulu, Jacob Hasiholan Insan Ari Maulana Iswadi Iswadi Iswandi Imran Ivindra Pane Kardianto, Arie Lusiana Lusiana Mahazir, Muhamad Manah . Muhammad Yusuf MUHAMMAD YUSUF Novita, Arisia Nurhayati Nurhayati Odie Sulung, Odie Parabi, Ashraf Dhowian pengelola, pengelola Rafie Rafie Ramadhany, Ajmal Randy Factsah Rubi Awalia, Rubi Salsabila, Putri Najwa Samsul Saputra, Husyin Sonny Franata Supatmi . Sutiono, Tansetiadi Syahmil, Muhammad Syavanka, Lucky Nur Ubabuddin, Ubabuddin Udi Wijayadi Vian, Ryan Al Yasin, Usman Z, Yosafat Zulshaec, Yongga