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Muhammad Mukhlisin
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Department of Civil Engineering Politeknik Negeri Semarang (State Polytechnic of Semarang) Jl. Prof. Sudarto, SH Tembalang, Kota Semarang (50275) Jawa Tengah, INDONESIA
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Wahana Teknik Sipil: Jurnal Pengembangan Teknik Sipil
Published by Politeknik Negeri Semarang
ISSN : 08538727     EISSN : 25274333     DOI : http://dx.doi.org/10.32497/wahanats
Core Subject : Science, Engineering,
Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Engineering Transportation
Wahana Teknik Sipil: Jurnal Pengembangan Teknik Sipil or Civil Engineering Forum: Journal of Civil Engineering Development is a medium of communication and dissemination of research results, case studies, and scientific reviews (applied) to scientists and practitioners in the field of Civil Engineering. This journal is published by the Civil Engineering Department of Semarang State Polytechnic periodically 6 (six) months, ie June and December. Scopes of Wahana Teknik Sipil: Jurnal Pengembangan Teknik Sipil or Civil Engineering Forum: Journal of Civil Engineering Development are: 1. Civil and Structural Engineeering 2. Environmental Engineering 3. Geotechnical Engineering 4. Transport Egineering 5. Water Resources Engineering 6. Constructions Management 7. Building Constructions. 8. Disaster Management.
Arjuna Subject : Teknik (semua kategori) - Bangunan dan Konstruksi
Articles 283 Documents
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EXPERIMENTAL AND NUMERICAL STUDY RETROFITTING BEAM WITH EXPANSION IN THE SUPPORT AREA Purba, Luki Hariando; Lisantono, Ade
Wahana Teknik Sipil: Jurnal Pengembangan Teknik Sipil Vol. 30 No. 1 (2025): Wahana Teknik Sipil
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/wahanats.v30i1.6053

Abstract

Retrofitting is one way to strengthen a building to withstand earthquakes and is often called an earthquake-resistant structure. Retrofitting beams will increase strength, stiffness, and ductility so that the structure is still stable when experiencing large earthquake forces. In addition to experimental methods, numerical methods are also used by researchers in developing a study of the behavior of building structures. Numerical methods using finite element software can examine the behavior of strength, stiffness, and ductility in beams. With this background, the author conducted a study of the retrofitting behavior of beams that were widened in the support area using numerical methods and theoretical analysis. The purpose of this study has been achieved so that a conclusion can be given that retrofitting with widening in the beam support area can increase the beam capacity quite significantly. Based on numerical research, with wide expansion reinforcement in the cross-sectional dimensions, the beam strength is increased by almost 45% and the beam stiffness is increased by 13-40% while ductility does not show a significant difference. These results are also expected to show the same behavior in experimental testing so that it will strengthen this reinforcement method. Experimental and numerical testing will be conducted in this study so that it will maintain the results and it is hoped that they can be accepted and practiced in the world of building construction.
TINJAUAN PENGARUH PENAMBAHAN SERAT POLYPROPYLENE DAN PEMANFAATAN BETON ULTRA HIGH PERFORMANCE TERHADAP KETAHANAN ABRASI BETON Hidayat, Maulana Nur; Solikin, Mochamad; Harnaeni, Senja Rum
Wahana Teknik Sipil: Jurnal Pengembangan Teknik Sipil Vol. 30 No. 1 (2025): Wahana Teknik Sipil
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/wahanats.v30i1.6062

Abstract

Concrete is a material that is widely used in the construction process, proven in various sectors widely used such as foundation construction, building structures, road pavements and water channels. However, concrete still has many weaknesses in abrasion resistance. To improve the quality of concrete abrasion resistance, the addition of Polypropylene fibers and the use of Ultra High Performance Concrete (UHPC) can be used. The fibers used in the study used Polypropylene fibers and the compressive strength of concrete with the UHPC method was planned to be more than 80 MPa. Mix planning was carried out using the American Concrete Institute (ACI) method with adjustments from trial and error. Furthermore, testing was carried out and test data was obtained which will be continued with the analysis and discussion process to draw conclusions. This study is intended to test the abrasion resistance of UHPC concrete with the addition of 0.2, 0.4, 0.6 polypropylene fibers, with the pressurized water spray method at the age of 28 days. The test results showed 0.351%, 0.284%, 0.369%.
INOVASI MATERIAL GEOSINTETIK (GEOCELL) DAN KIMIA (GEOPOLL) UNTUK OPTIMALISASI PERBAIKAN JALAN HAULING DI PT. MARUWAI COAL Raharjo, Oky Fauzi; Mudiyono, Rachmat; Rochim, Abdul
Wahana Teknik Sipil: Jurnal Pengembangan Teknik Sipil Vol. 30 No. 1 (2025): Wahana Teknik Sipil
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/wahanats.v30i1.6180

Abstract

PT Maruwai Coal faces challenges in increasing hauling production efficiency due to the decline in the quality of hauling roads. In April 2023, dump truck traffic only reached 1.58 cycles/shift, far below the target of 2 cycles/shift, causing a production loss of 26% (91,280 tons). This condition is influenced by the decline in the quality of hauling roads, which is reflected in the Coal Hauling Road Index (CHRI) value which only reached 81.02% in the 17th week of 2023, far below the standard of 90%. Decreased road performance results in increased travel time, maintenance costs, and faster vehicle damage.   This research aims to apply the principles of geosynthetic (geocell) and chemical (geopoll) materials in improving transport roads. In addition, the Road Maintenance application is used to maintain road conditions, provide recommendations for repairs, and ensure proper implementation of SOPs. A case study was carried out on Segment 4 (KM39”“KM52) by measuring changes in CHRI values, average speed and production results. The application of geocell increased the CHRI value from 83% to 91.23% and extended the life of the road by more than 8 weeks. The use of geopoll increases the bearing capacity of the soil, reduces installation and maintenance costs by 21.95%, and increases the average speed from 35.08 km/h to 38.66 km/h. Production increased from 362,419 tonnes/month to 397,337 tonnes/month, resulting in increased profits of $8,243,790 per month. This research shows that geocells, geopolls and digital applications significantly improve cost efficiency, road performance and support production sustainability at PT Maruwai Coal. This study makes a real contribution to the development of infrastructure technology.
DESAIN MODEL BASISDATA PEMELIHARAAN KOMPONEN MECHANICAL- ELECTRICAL GEDUNG SEBAGAI PENDUKUNG FACILITY MAINTENANCE MANAGEMENT (FMM) Santosa, Stefanus; Suwarto, Suwarto; Sudarmono, Sudarmono; Setiyono, Karnawan Joko; Suwarno, Anung; Pratama, M Hafidh Aditya; Wicaksono, M Rafi
Wahana Teknik Sipil: Jurnal Pengembangan Teknik Sipil Vol. 30 No. 1 (2025): Wahana Teknik Sipil
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/wahanats.v30i1.6296

Abstract

Current planning and implementation of building Mechanical-Electrical (ME) component maintenance are inefficient due to the lack of proven methods and techniques for providing accurate, non-overlapping, effective, and efficient information. Current ME component maintenance management practices and processes face numerous challenges related to data compilation and management, including data loss, wasted time searching for information, and a lack of interoperability. Research on databases, particularly in the building maintenance phase, remains limited. Data compilation is limited to scheduling and existing condition data used to generate routine maintenance reports with reference to implementation dates. This research resulted in an integrated Building MechanicalElectrical Component Maintenance Database Model to support Facility Maintenance Management (FMM). This model has met the requirements by passing the Database Reliability Test. The test used queries ranging from simple to highly complex to provide accurate, non-overlapping, effective, and efficient information needed to manage data on materials, equipment, contractors, types of work, schedules, and costs during the maintenance and repair phase.
STUDI KERETAKAN GEDUNG DAN AKSES JALAN KAMPUS POLITEKNIK PEKERJAAN UMUM DI KOTA SEMARANG UTOMO, ADITYO BUDI; Agung Bhakti Utama; Laely Fitria Hidayatiningrum; Andi Patiroi
Wahana Teknik Sipil: Jurnal Pengembangan Teknik Sipil Vol. 30 No. 1 (2025): Wahana Teknik Sipil
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/wahanats.v30i1.6314

Abstract

The MBH Campus, Public Works Polytechnic (PUtech) located in Semarang City began construction in 2021 - 2022 and functional in early 2023. Six months after its first operation, much damage was found to the building and access roads where there were many cracks in the walls with the same pattern and widening and collapsing in several parts of the garden and access roads that widened over time. A study was conducted to identify the cause of the damage that occurred. The study began by identifying the level of damage to the PUtech campus building and making assumptions regarding the cause of the damage. A more detailed investigation was carried out to strengthen the possibility of suspicions. The analysis was carried out based on the results of field measurements, non-destructive material tests, and soil characteristic tests on the building. The study's results showed a tendency for the building to subside to the north by 0-4 cm per year. The subsidence did not indicate conditions that were dangerous to the building structure because it occurred evenly. The base soil is in the form of cohesive inorganic clay with moderate plasticity so there is a high potential for soil expansion. The soft base soil, classified as soft soil, has the potential for consolidation up to 40 cm due to the existing building load.
EVALUASI EFEKTIVITAS BAKTERI BACILLUS MEGATERIUM SEBAGAI MATERIAL INJEKSI SELFHEALING UNTUK PERBAIKAN RETAK BETON Alimin, Baso Muhammad Ilham; Muhammad Mauludin, Luthfi; Gandhi Widiarnoko
Wahana Teknik Sipil: Jurnal Pengembangan Teknik Sipil Vol. 30 No. 1 (2025): Wahana Teknik Sipil
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/wahanats.v30i1.6327

Abstract

Concrete deterioration is a significant problem in the construction industry, which can reduce the service life and structural performance of buildings. Conventional repair methods, such as the use of epoxy and other bonding materials, are commonly used to improve the durability of concrete, but often rely on synthetic materials that are not environmentally friendly. This study focuses on the use of Bacillus megaterium bacteria combined with epoxy as a self-healing injection material, offering an environmentally friendly and sustainable solution to overcome concrete cracking. This study explores the potential of Bacillus megaterium to biologically repair concrete structures by adding the bacteria to epoxy at concentrations of 5%, 10%, 15%, 20%, and 25%. Concrete blocks measuring 100 mm x 100 mm x 500 mm were tested using flexural strength, ultrasonic wave velocity (UPV), and scanning electron microscopy (SEM) tests to assess the effectiveness of the repair. The results showed that at a concentration of 15%, Bacillus megaterium increased the flexural strength by 12.19% of the initial strength and the UPV velocity reached 3.19 km/s, which was almost equivalent to normal concrete. SEM analysis showed the formation of calcium carbonate deposits on the cracks, indicating the success of the self-healing process. This study shows that the application of Bacillus megaterium in epoxy provides an environmentally friendly alternative to conventional concrete repair methods, reduces dependence on synthetic chemicals, and extends the service life of concrete infrastructure. This innovation contributes to the development of more sustainable and efficient construction practices in civil engineering.
PERBAIKAN NILAI KADAR AIR DAN INDEKS PLASTISITAS TANAH LEMPUNG LUNAK MENGGUNAKAN BAHAN TAMBAH EXPANDED POLYSTYRENE (EPS) DAN RESIDIUM CRACKING CATALYST 15 (RCC 15) shaputra, muhammad rio eka; Syahril; Indra Noer Hamdhan; Geni Firuliadhim
Wahana Teknik Sipil: Jurnal Pengembangan Teknik Sipil Vol. 30 No. 1 (2025): Wahana Teknik Sipil
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/wahanats.v30i1.6424

Abstract

The uneven distribution of development in each region can result in construction on land with poor characteristics. One of the soils that has weak characteristics is soft clay. Soft clay has weak characteristics, such as relatively high water content and plasticity index (PI), so it needs to be stabilized to improve its bearing capacity before being used in construction. This study aims to examine the effect of adding Expanded Polystyrene (EPS) which is a fabricated material with Residium Cracking Catalyst 15 (RCC15) which is a waste product of oil processing from PT. Pertamina on improving the characteristics of soft clay. The specimens from Cililin, Bandung Regency, has a soft inorganic clay (CH) with a clay content of 61% and a water content of 37.945%. Test specimens were made with variations in the addition of EPS of 0.4% and RCC15 of 20%, 25%, and 30%. The results of the property index test showed that the addition of RCC15 can increase the water content and plasticity index (PI) value, with the optimum value at a mixture of 0.4% EPS and 25% RCC15. The impact of using EPS and RCC15 as additives has the potential to increase the stability of soft clay, making it suitable for use in construction.
OPTIMASI KUAT TEKAN PASTA GEOPOLIMER BERBAHAN DASAR FLY ASH DENGAN VARIASI RASIO MASSA FLY ASH DAN ALKALI AKTIVATOR (FA/AA) Nayobi, Budi; Rosidawani; Brata Adhitya, Bimo
Wahana Teknik Sipil: Jurnal Pengembangan Teknik Sipil Vol. 30 No. 1 (2025): Wahana Teknik Sipil
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/wahanats.v30i1.6441

Abstract

Cement production generates high CO₂ emissions, which have a negative impact on the environment. To reduce this carbon footprint, alternative materials to cement are needed. Geopolymer paste presents a promising solution as it utilizes industrial waste such as fly ash, is environmentally friendly, and can achieve good mechanical strength. This study aims to optimize the compressive strength of fly ash-based geopolymer paste by varying the mass ratio of fly ash to alkaline activator (FA/AA). The fly ash used was characterized using X-Ray Fluorescence (XRF), X-Ray Diffraction (XRD), and Scanning Electron Microscope (SEM) to determine its crystal structure, chemical composition, and particle morphology. The characterization results indicate that the fly ash is predominantly amorphous, classified as Class F according to ASTM C618-2019, and has spherical particles with sizes less than 2 µm, making it suitable as a geopolymer precursor. Test specimens were prepared in the form of 50 mm × 50 mm × 50 mm cubes, and compressive strength tests were conducted at 3, 7, and 28 days with varying FA/AA ratios. The test results showed that compressive strength increased with the FA/AA ratio up to an optimum ratio of 2.5, then decreased at a ratio of 3. This indicates that the FA/AA ratio significantly affects the development of compressive strength in geopolymer paste. These findings are expected to serve as a foundation for developing environmentally friendly alternative materials to replace Portland cement.
ANALISIS DEBIT BANJIR PADA SUB DAERAH ALIRAN (DAS) SUNGAI TABUK, PERBANDINGAN METODE HIDROGRAF SATUAN SINTETIK SCS DAN SNYDER Amal, Nilna; Haliza, Noor
Wahana Teknik Sipil: Jurnal Pengembangan Teknik Sipil Vol. 30 No. 2 (2025): Wahana Teknik Sipil
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/wahanats.v30i2.6890

Abstract

Floods are a natural disaster that can occur during the rainy season in various watershed areas across many regions of Indonesia. Continuous heavy rainfall causes rivers to exceed their capacity, leading to flooding. The Sungai Tabuk sub-district, which comprises 20 villages and one urban village, is entirely affected by flooding, with the worst-hit area being Pemakuan Darat Village. To determine the magnitude of the flood discharge, a hydrological model simulation using the HEC-HMS software is necessary. The analysis was conducted by collecting data on the Sub-basin of Sungai Tabuk, which includes primary and secondary data. The data was processed to create a rainfall-runoff model using HEC-HMS. The rainfall distribution process was carried out using the Mononobe distribution. The method used is the SCS Curve Number, while direct runoff is analyzed using the HSS SCS and the HSS Snyder. The simulation results with observations dated January 1, 2021, using the Mononobe distribution method by SCS and Snyder, are as follows: the SCS method at the outlet Reach and Sink had the highest discharge of 1,430.2 m³/s, whereas the Snyder method had a discharge of only 1,092.3 m³/s. In contrast, the discharge observed in the field was 39.072 m³/s. It can be seen that the discharge values from the HEC-HMS software are significantly higher than the discharge values obtained in the field.
PENGARUH BUDAYA KERJA TERHADAP PERSEPSI KESELAMATAN PADA PEKERJA KONSTRUKSI DI INDUSTRI MINYAK DAN GAS Bagos Armansyah; Albani Musyafa; Fitri Nugraheni; Hari Purnomo
Wahana Teknik Sipil: Jurnal Pengembangan Teknik Sipil Vol. 30 No. 2 (2025): Wahana Teknik Sipil
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/wahanats.v30i2.6971

Abstract

Occupational safety is a crucial aspect in the oil and gas industry, especially in the high-risk field construction sector. This study aims to analyze the influence of work culture on the perception of safety in field construction workers, especially in the work area of Riau province. The method used was a qualitative and quantitative approach by distributing questionnaires to 108 workers in oil and gas construction projects. The data were analyzed using linear regression to measure the relationship between work culture and safety perception. The results of the study showed that work culture has a positive and significant influence on safety perception, where work culture contributes to safety perception by 45.9%. These findings indicate that a strong work culture can improve the perception of safety, thereby reducing the risk of accidents. Therefore, companies in the oil and gas industry are advised to consistently foster a work culture that supports safety to minimize the risk of work accidents

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