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Jurnal Ilmiah Rekayasa Sipil
Published by Politeknik Negeri Padang
ISSN : 18583695     EISSN : 26552124     DOI : https://doi.org/10.30630/jirs.v21i2
Core Subject : Engineering,
Civil Engineering, Building, Construction & Architecture
Jurnal Ilmiah Rekayasa Sipil is intended as a medium for scientific studies of research results, thoughts and critical-analytical studies regarding research in the Field of Civil Engineering Science. As part of the spirit of disseminating knowledge resulting from research and thinking for wider community service and as a reference source for academics in the field of Civil Engineering. Jurnal Ilmiah Rekayasa Sipil accepts scientific articles with the scope of research on: Structural Engineering Construction Materials Geotechnical Engineering Environmental Engineering Water Resources Engineering Transportation Planning and Management Road Design and Pavement Bridge Structure Construction Management Earthquake and Tsunami Other relevant study topics With articles that have primary citations and have never been published online or in print before.
Arjuna Subject : Teknik (semua kategori) - Teknik Sipil dan Struktur
Articles 159 Documents
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Pengaruh Penambahan Abu Tempurung Kelapa dan Silika Fume Terhadap Kuat Tekan Beton Saputra, Ian Sugiawan; Sulfanita, Andi; Misbahuddin, Misbahuddin
Jurnal Ilmiah Rekayasa Sipil Vol 22 No 1 (2025): April 2025
Publisher : Pusat Penelitian dan Pengembangan Masyarakat (P3M), Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jirs.v22i1.1704

Abstract

Coconut shell ash and silica fume can enhance the strength and durability of concrete. Coconut shell ash, as an organic waste material, functions as a lightweight aggregate, while silica fume improves the bond between cement and aggregate, thereby increasing the overall durability of the concrete. This study aims to compare the compressive strength results and determine the optimal percentage of coconut shell ash and silica fume in both normal and mixed concrete at 28 days of curing, using an experimental method. The results showed that the compressive strength of normal concrete at 28 days was 26.33 MPa. After the addition of 2% coconut shell ash and 2% silica fume, the compressive strength increased significantly to 31.61 MPa, representing an improvement of 5.28 MPa. However, adding more than 2% coconut shell ash led to a decrease in compressive strength, with the lowest value of 22.36 MPa observed in the mixture containing 10% coconut shell ash and 2% silica fume. The optimal combination was found to be 2% coconut shell ash and 2% silica fume, yielding the highest compressive strength of 31.61 MPa. These findings suggest that organic waste such as coconut shell ash can serve as an environmentally friendly alternative in the construction industry, especially when combined with supplementary materials like silica fume.
Analisis Kapasitas Saluran Drainase Menggunakan Permodelan SWMM pada Jalan Pembangunan Kota Batam Lurich, Frank; Saputra, Ade Jaya; Ginting, Jody Martin
Jurnal Ilmiah Rekayasa Sipil Vol 22 No 1 (2025): April 2025
Publisher : Pusat Penelitian dan Pengembangan Masyarakat (P3M), Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jirs.v22i1.1725

Abstract

Sistem drainase memiliki peran krusial dalam mengelola air hujan dan mencegah banjir, terutama di kota berkembang seperti Kota Batam. Salah satu wilayah yang rentan terhadap banjir akibat curah hujan dengan intensitas sedang hingga tinggi adalah Jalan Pembangunan, Kecamatan Lubuk Baja, Kota Batam. Permasalahan ini disebabkan oleh kapasitas saluran drainase yang tidak mampu menampung debit air hujan. Penelitian ini bertujuan untuk menganalisis sistem drainase menggunakan perangkat lunak Storm Water Management Model (SWMM) serta mengidentifikasi peluang perbaikan yang dapat diterapkan. Data yang digunakan dalam penelitian ini terdiri dari data primer dan sekunder, dengan curah hujan sebagai parameter utama dalam analisis kinerja sistem drainase. Berdasarkan analisis frekuensi, distribusi log normal digunakan untuk menghitung intensitas hujan. Hasil perhitungan menunjukkan bahwa intensitas hujan di lokasi penelitian mencapai 107,74 mm/jam dengan debit puncak sebesar 48,75 m³/s. Penelitian ini menggunakan periode ulang 2 tahun, karena lokasi penelitian berada di kawasan perkotaan dengan luas daerah aliran mencapai 1,89 km². Hasil simulasi SWMM terhadap kapasitas saluran drainase menunjukkan bahwa saluran drainase eksisting di Jalan Pembangunan tidak mampu menampung debit air hujan dengan intensitas tinggi. Oleh karena itu, diperlukan peningkatan kapasitas saluran drainase serta pemeliharaan yang berkelanjutan guna mengurangi risiko banjir di wilayah tersebut.
Uji Kuat Tekan Mortar Geopolymer Berbasis Fly Ash dan Kapur Tupail, Fharhan; Jasman, Jasman; Muis B, Abd
Jurnal Ilmiah Rekayasa Sipil Vol 22 No 1 (2025): April 2025
Publisher : Pusat Penelitian dan Pengembangan Masyarakat (P3M), Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jirs.v22i1.1728

Abstract

The increasing use of infrastructure in Indonesia every year requires a large cement supply. Cement is a very crucial material for development, and its demand in increasing line with the development of human facilities and infrastructure. However, the cement manufacturing process can cause air pollution, CO₂ gas emissions, and produce B3 waste that can damage the environment. One way to reduce this environmental impact is to utilize industrial waste, such as fly ash and lime, as an alternative to cement using geopolymer technology. This study aimed to measure the compressive strength of geopolymer mortar made from fly ash and lime, and to understand how variations in the mixture affect the achievement of maximum mortar strength. The approach applied in this study is an experimental method carried out in the laboratory of the Muhammadiyah University of Parepare. The test specimens used were in the form of cubes measuring 5x5x5 cm with a ratio of fly ash and lime of 70:30, 75:25, and 80:20, so that a total of 36 test specimens were made. The experiment results showed that the mixture with a higher proportion of ash consistently produced greater compressive strength. The mixture with 75% fly ash and 25% lime increased in compressive strength from 6.667 MPa after 7 days to 10.667 MPa after 28 days. This proves that the addition of fly ash in greater amounts can increase the compressive strength of the mortar, especially because fly ash functions as a pozzolanic material that reacts with free lime, forming calcium silicate hydrate (C-S-H) compounds that function as the main binder and thus strengthen the mortar structure. Therefore, the combination of fly ash and lime at 80%:20% is the most efficient and superior mixture in producing high-strength mortar.
Analisis Perilaku Balok Beton Bertulang dengan Perkuatan Fiber Reinforced Polymer (FRP) Berdasarkan Variasi Tinggi Silvi, Ni Putu; Laintarawan, I Putu
Jurnal Ilmiah Rekayasa Sipil Vol 22 No 1 (2025): April 2025
Publisher : Pusat Penelitian dan Pengembangan Masyarakat (P3M), Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jirs.v22i1.1730

Abstract

Structural failure due to structural design that does not meet the minimum standards according to SNI results in structural failure, one of which is cracks. One of the popular strengthening for reinforced concrete beams is using FRP (Fiber Reinforced Polymer). This is because FRP has the advantages of being lightweight, easy to install, corrosion resistant and does not interfere with the function of the structure. The purpose of this study was to determine the behavior of strengthening reinforced concrete beam structures using FRP with variations in FRP strengthening height against reinforced concrete beams without strengthening. The method used in this study is a quantitative method using FRP height variation data which is modeled and analyzed using the finite element method. Modeling and analysis using SAP2000 software assistance with 5 (five) models, namely model 1 is a model without reinforcement, models 2, 3, 4 and 5 with FRP heights of 0.25h, 0.5h, 0.75h and h respectively. The FRP thickness is 5 mm. The loads calculated in the analysis are the ultimate dead and live loads according to SNI 1727: 2020 (SNI Loading) and SNI 2847: 2019 (SNI Concrete). Based on the analysis results, strengthening reinforced concrete beams with FRP can reduce vertical deflection due to the ultimate load by an average of 46.146% compared to beams without strengthening. The ultimate moment of the support and the field of the FRP-strengthened beam can increase the ultimate flexural and shear capacity by an average of 0.242% compared to beams without strengthening. Likewise, the bending stress s11 min and s11 max of the FRP-strengthened beam can increase the average bending stress capacity by 21.65% compared to beams without strengthening. The maximum stress and strain contours decrease as the FRP strengthening height increases.
Studi Eksperimental Karakteristik Beton Ringan SCC dengan Penambahan Styrofoam dan Benang Gelasan Fajrul Falah, Muhammad; Solikin, Mochamad; Kholilur Rohman, Rosyid; Muhammad Nuryanto, Fadhil; Ika Hariani, Deby; Putri Yastari, Febi; Agung Saputra, Cahyo
Jurnal Ilmiah Rekayasa Sipil Vol 22 No 1 (2025): April 2025
Publisher : Pusat Penelitian dan Pengembangan Masyarakat (P3M), Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jirs.v22i1.1736

Abstract

Global sustainability is a big challenge for various industry sectors, including the construction industry. Concrete is a key material in infrastructure development due to its high strength and good durability. However, concrete production has significant environmental impacts, such as the exploitation of natural resources and increased carbon emissions. Therefore, there is a need to innovate materials that are more environmentally friendly without reducing the quality of concrete. This research aims to explore the use of Styrofoam waste and yarn as additives in concrete mixes. Styrofoam was chosen due to its lightweight and biodegradable nature, its use in concrete can reduce environmental pollution. Meanwhile, yarn was added to increase the strength of concrete that had undergone changes due to the addition of Styrofoam. This research was conducted using an experimental method with the addition of 30% Styrofoam from the total fine aggregate as a fixed variable. In addition, variations of yarn were used at 0.5% and 1% of the total concrete mix. Tests were carried out using cylindrical test objects with a diameter of 15 cm and a height of 30 cm, with a total of 8 samples tested to determine the compressive strength value of the resulting concrete. The test results showed that the highest compressive strength was obtained in the variation of adding 1% yarn, with a value of 15.03 MPa. This shows that the combination of styrofoam and yarn still allows the concrete to have sufficient strength for certain construction applications. From this research, it can be concluded that the use of Styrofoam and yarn in concrete has the potential to be an environmentally friendly material innovation that supports the sustainability of the construction industry. By utilizing this waste, it is expected to reduce environmental impact and open up new opportunities in the development of sustainable construction materials
Perencanaan Rencana Anggaran Biaya RumahTinggal dengan Pendekatan Inovatif di Kota Kendari Nesya, Badzlina Harvy; Alvanda, Muhammad Reyhan; Habibulloh, Abdi; Nugroho, Shabrina Salsabila
Jurnal Ilmiah Rekayasa Sipil Vol 22 No 1 (2025): April 2025
Publisher : Pusat Penelitian dan Pengembangan Masyarakat (P3M), Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jirs.v22i1.1749

Abstract

Kendari is the capital city of Southeast Sulawesi Province which administratively has 11 sub-districts and 65 villages. In 2023, the population of Kendari City reached 351,051 people which is increasing from year to year. This increase in population causes the need for houses as a basic need for housing for the community to also continue to increase from year to year. The house as a residence is certainly the key to the comfort and safety of its inhabitants. This comfort and security cannot be separated from efficient and effective house construction planning so that these goals can be achieved properly. The purpose of this research is to obtain detailed specifications of innovative implementation methods and materials that can make the construction of residential houses with a Budget Plan (RAB) that becomes effective and efficient and prioritizes aspects of quality and high quality. The data studied in this research is a residential house with an area of 7m x 9.5m located in Kendari City, Southeast Sulawesi Province. The results obtained are the calculation of the Cost Budget Plan (RAB) of Rp318,419,000 and the innovations applied to achieve the effectiveness and efficiency of residential construction, namely the calculation of the quantity of work items by prioritizing good waste management aspects, the use of high-quality products, casting using mini ready mix concrete with maintained quality, and innovative use of technology such as SketcUp 3D and Microsoft Project for efficient project execution and scheduling methods.
Analisis Stabilitas dan Perbandingan Metode Perbaikan Longsor Ruas Jalan Barung-Barung Belantai KM. 45+400, Pesisir Selatan Zelby, Rahayu; Hakam, Abdul; Andriani, Andriani
Jurnal Ilmiah Rekayasa Sipil Vol 22 No 1 (2025): April 2025
Publisher : Pusat Penelitian dan Pengembangan Masyarakat (P3M), Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jirs.v22i1.1761

Abstract

The Barung-Barung Belantai road section is located in Pesisir Selatan Regency, West Sumatra. The area is dominated by steep hillsides that are prone to landslides. The types of slope reinforcement used are Gabion, Cantilever Retaining Walls and Sheet Piles. This study aims to calculate the slope safety factor value using the slice method, analyze slope reinforcement against the safety factors of overturning, sliding, soil bearing capacity and calculate the cost and time of the work. Based on the calculation of slope stability, the slope safety factor (Fs) value is 0.8569, overturning is 0.971, and the soil bearing capacity value is 0.996. These values ​​indicate that the slope condition is classified as unstable because all safety factor values ​​(Fs) are below 1.25, which is the safe limit. Based on this analysis, this study recommends the use of a 4-meter high cantilever retaining wall as a repair solution. The calculation results show that this wall has a safety factor (Fs) against shear of 4.920, overturning of 2.003, and soil bearing capacity of 4.730, including the safe category and meeting technical criteria. It is concluded that the cantilever wall is more efficient than the gabion and sheet pile methods. The construction of the cantilever wall requires a budget of Rp. 522,259,000 with a working time of 14 weeks. As a comparison, the construction of the gabion structure costs Rp. 560,974,000 with a work duration of 11 weeks, while the sheet pile costs Rp. 629,578,000.- with a work time of 10 weeks.
Penanganan Longsor Pada Ruas Jalan Padang – Painan (Sta. 50+950 - 51+035) di Kabupaten Pesisir Selatan dengan Dinding Penahan Tanah dan Fondasi Tiang Bor Laurency, Sonya Ostha; Andriani, Andriani; Hakam, Abdul; Istijono, Bambang
Jurnal Ilmiah Rekayasa Sipil Vol 22 No 1 (2025): April 2025
Publisher : Pusat Penelitian dan Pengembangan Masyarakat (P3M), Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jirs.v22i1.1765

Abstract

High rainfall on steep slopes along the Padang – Painan city boundary road (Sta 50+950 – Sta 51+035) Pesisir Selatan Regency resulted in landslides and damage to retaining walls. This study aims to analyze slope stability, and retaining wall stability without and using bored pile foundations. The retaining wall used in this study is the Cantilever type. Slope stability analysis using the slices method was carried out by trial and error three times, the results showed a safety factor value (FS <1.25) which means the slope is unstable. The results of the slope improvement analysis using cantilever retaining wall without bored pile foundations showed that the structure was safe against overturning (FS = 3.9) and shear safety (FS = 2.3), but not safe against soil bearing capacity (FS = 1.5 <3). The addition of a single bored pile foundation to the retaining wall increased the bearing capacity to 3,443.43 kN but was unable to withstand the design load of 41,766.45 kN. Therefore, a pile group foundation with a maximum load capacity of 482,080.27 kN, and a permissible bearing capacity of 192,832 kN is used so that it can withstand the structural load. The estimated cost of geotechnical and structural work is Rp10,361,534,397.05 with an implementation time of 10 weeks. The results of this study provide technical recommendations for comprehensive slope and DPT repairs for similar conditions in the future.
Kajian Disrupsi Pada Transportasi Umum (Angkot) Di Kecamatan Nanggalo,Kota Padang Dengan Metode Importance Performance Analisis Prawira, Dazaqki; Roza, Angelalia; Wahab, Wilton; JF, Anggun Pratiwi
Jurnal Ilmiah Rekayasa Sipil Vol 22 No 1 (2025): April 2025
Publisher : Pusat Penelitian dan Pengembangan Masyarakat (P3M), Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jirs.v22i1.1794

Abstract

This study aims to analyze the impact of disruption caused by the development of online transportation on public minivans (angkot) in the Nanggalo District, Padang City, and to assess changes in public interest in choosing urban transportation modes. Disruption refers to innovation that replaces existing systems with new methods, and this phenomenon is also occurring in spatial planning in Indonesia, particularly in the transportation sector. In recent years, angkot, as a primary mode of transportation, has experienced a decline in passenger numbers and fleet size due to the emergence of online transportation applications such as Gojek and Grab. The methodology employed in this research is Importance Performance Analysis (IPA). The findings indicate that 73% of respondents prefer using online transportation, leading to a 48.67% decrease in angkot passengers. The average frequency of angkot operating during peak hours is recorded at only 3 vehicles per hour for the Pasar Nanggalo – Lapai route and 5 vehicles per hour for the Pasar Nanggalo – Gunung Pangilun route. Furthermore, the load factor for the Pasar Nanggalo – Lapai route is 41.67%, while for the Pasar Nanggalo – Gunung Pangilun route, it is 48.61%. The average waiting time for angkot on the Pasar Nanggalo – Lapai route is 13 minutes, whereas for the Pasar Nanggalo – Gunung Pangilun route, it is 7 minutes. This study recommends enhancing the quality of angkot services, including more regular scheduling, improved cleanliness, and increased comfort during trips. Additionally, it is crucial for local governments to formulate policies that support the sustainability of angkot through driver training programs and innovations in public transportation systems. By doing so, it is expected that angkot can adapt to technological advancements and meet the evolving needs of the community.

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