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International Journal of Research in Vocational Studies (IJRVOCAS)
Published by Yayasan Ghalih Pelopor Pendidikan
ISSN : 27770168     EISSN : 27770141     DOI : https://doi.org/10.53893/ijrvocas.v1i1
Core Subject : Economy, Science, Education, Social, Engineering,
Aerospace Engineering Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Social Sciences Other
The International Journal of Research in Vocational Studies (IJRVOCAS) is a double-blind peer-reviewed journal. This journal provides full open access to its content on the principle that making research freely and independently available to the science community and the public supports a greater global exchange of knowledge and the further development of expertise in the field of vocational education and training (VET). IJRVOCAS is since the beginning independent from any non-scientific third-party funding. The establishment of the journal was supported between 2015 and 2016 with grants from the Yayasan Ghalih Pelopor Pendidikan (Ghalih Foundation). All members of IJRVOCAS work on an honorary basis. The journal is hosted by Ghalih Publishing and the publishing house of the Ghalih Academic. Scope IJRVOCAS covers all topics of VET-related research from pre-vocational education (PVE), initial vocational education and training (IVET) and career and technical education (CTE) to workforce education (WE), human resource development (HRD), professional education and training (PET) and continuing vocational education and training (CVET).
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 242 Documents
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The Influence of Kaolin as an Additive on Concrete Compressive Strength Rasiwan; Sasongko, Hartanto Wahyu; Abduh, Muhammad
International Journal of Research in Vocational Studies (IJRVOCAS) Vol. 5 No. 4 (2026): IJRVOCAS - Special Issues - Hybrid International Conference on Construction, Ma
Publisher : Yayasan Ghalih Pelopor Pendidikan (Ghalih Foundation)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53893/ijrvocas.v5i4.237

Abstract

Kaolin is a clay soft, white mineral which can be found in nature and is known as clay stones. This research aimed to investigate the effect of using kaolin as an additive material toward compressive strength of concrete. This was qualitative experimental research which the object being a concrete K-350. The researchers planned K-350 based on the concrete standard for building structure four floors. The kaolin mixture used was at a percentage of 5%, 10%, and 15% of the cement weight according to the job mix formula for K-350 concrete quality. After 28 days, the resulting concrete samples were tested in the laboratory using a compressive strength testing machine. The results showed that the average compressive strength of kaolin 5%, 10%, and 15% were 27.27 MPa, 30.15 MPa and 24.48 MPa. The optimum result of the kaolin mixture was 15%. Based on the result, the researchers did not recommend applying kaolin as an additive material for building structure four floors.
Revitalization of the Akcaya Park in Pontianak City for Green Open Space Planning Mahardi, Putri Pratama; Alifia, Rizka; Muhtadi, Ahmad; Anggraini, Irene
International Journal of Research in Vocational Studies (IJRVOCAS) Vol. 5 No. 4 (2026): IJRVOCAS - Special Issues - Hybrid International Conference on Construction, Ma
Publisher : Yayasan Ghalih Pelopor Pendidikan (Ghalih Foundation)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53893/ijrvocas.v5i4.240

Abstract

Akcaya Park is one of the open green spaces that plays an important role in providing recreational facilities, supporting social interaction, and improving environmental quality in Pontianak City. However, the park’s existing condition shows a decline in the quality of its facilities, aesthetics, and spatial utilization, making revitalization efforts necessary. This study aims to design a revitalization concept for Akcaya Park that can optimize its ecological, social, and aesthetic functions in accordance with community needs and technical standards for green open space planning.The methodology includes field surveys, collection of primary and secondary data, analysis of existing conditions, and the preparation of a design concept based on landscape planning principles and relevant technical guidelines. The design takes into account spatial arrangement, circulation, supporting facilities, lighting, vegetation, and environmental sustainability. Based on the design results, the revitalization of Akcaya Park focuses on improving accessibility, comfort, and optimizing the park’s functions, which include upgrading the children’s playground, relaxation garden, parking areas, public toilets, basketball court, waste management facilities, and lighting. This design is expected to meet community needs and contribute to the creation of a green, comfortable, and sustainable city.
Time and Cost Planning Using the Crashing Method in the Construction of the Nuclear Medicine Building of dr. Soedarso Arena, Azza; Fitriani, Nurul; Fajry, Raihanny Syafrina; Putra, Septian Eka
International Journal of Research in Vocational Studies (IJRVOCAS) Vol. 5 No. 4 (2026): IJRVOCAS - Special Issues - Hybrid International Conference on Construction, Ma
Publisher : Yayasan Ghalih Pelopor Pendidikan (Ghalih Foundation)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53893/ijrvocas.v5i4.259

Abstract

The construction of the Nuclear Medicine Building of dr. Soedarso is a strategic effort to improve health services in West Kalimantan, especially in dealing with internal diseases such as cancer and heart. This project has an implementation deadline, so effective and efficient planning is required. This research aims to plan project time and costs using the crashing method, as well as consider aspects of human resources (HR), Occupational Health and Safety (K3), and project communication. The methodology used in the preparation of this final project is secondary data analysis in the form of RAB, AHSP, S curve, and basic price in 2024. The calculation of time and cost is carried out based on two approaches to project acceleration, namely the addition of working hours (overtime) and the addition of manpower. The analysis is complemented by the identification of the amount of labor needed, potential hazards at the work site, PPE needs, and communication used in the project. Normally for structural work, this project requires a cost of IDR 8.17 billion with a duration of 84 days. The results of this planning show that the crashing method with the alternative of adding working hours (overtime) costs IDR 8.19 billion, with a duration of 72 days (12 days faster than the normal duration). The crashing method with the alternative of adding labor costs 1DR 8.18 billion, with a duration of 67 days (17 days faster than the normal duration). Based on the results of these calculations, the crashing method can speed up project completion by considering labor productivity and cost-effectiveness. Recommendations from these results can be used as a consideration in making decisions on the implementation of project acceleration by contractors or other project implementing parties.
The Use of Expanded Polystyrene (EPS) Waste on the Compressive Strength of Concrete Using Fiber Reinforced Polymer (FRP) Rasendriya, Shafa; Effendi, Rizki; Setiawan, Randy; Purnama, Ikhwan Arief
International Journal of Research in Vocational Studies (IJRVOCAS) Vol. 5 No. 4 (2026): IJRVOCAS - Special Issues - Hybrid International Conference on Construction, Ma
Publisher : Yayasan Ghalih Pelopor Pendidikan (Ghalih Foundation)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53893/ijrvocas.v5i4.263

Abstract

The increase in restaurants and online food ordering can increase waste or waste made from Expanded Polystyrene (EPS).  Expanded Polystyrene (EPS) can be used as an additive to concrete because it has properties that are difficult to decompose naturally. Along with the development of the times, many innovations have sprung up in the world of construction to increase the strength of structures. The reinforcement of concrete is done by providing alternative materials that are quite popular, namely Fiber Reinforced Polymer (FRP). This study was conducted to determine the physical properties, mechanical properties of concrete, and the percentage of the use of the most optimum additives that will be applied to the foundation structure using additional materials in the form of Expanded Polystyrene (EPS) with variations of 0%, 1%, 1.5%, 2%, and 2.5% and a layer of Fiber Reinforced Polymer (FRP) as much as 1 layer which will be tested compressively, by looking at the effect of two types of water for curing, namely peat water and normal water with a planned concrete quality of 21.7 MPa using a cylindrical concrete mold 15 cm in diameter and 30 cm high. Concrete compressive strength tests were conducted at 7 days and 28 days of concrete age. Based on the test results, there is an increase in the highest water absorption of concrete, namely in the 28-day normal water immersion variation of 2% EPS + FRP by 4.05% The addition of Expanded Polystyrene (EPS) and Fiber Reinforced Polymer (FRP) in concrete can increase the highest concrete compressive strength, namely in the 7-day NORMAL water immersion variation 1.5% EPS + FRP by 27.54 MPa. While the highest concrete strength value in peat water immersion for 7 days of normal variation is 27.10 MPa.
Design of an 8-Story Reinforced Concrete Hotel Building Using a Moment-Resisting Frame System at Sepakat II Street in Pontianak City Damara, Rieky; Sasongko, Hartanto Wahyu; Rahmasari, Puspita; Anggraini, Irene
International Journal of Research in Vocational Studies (IJRVOCAS) Vol. 5 No. 4 (2026): IJRVOCAS - Special Issues - Hybrid International Conference on Construction, Ma
Publisher : Yayasan Ghalih Pelopor Pendidikan (Ghalih Foundation)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53893/ijrvocas.v5i4.298

Abstract

Pontianak City has experienced a steady increase in tourist arrivals, which has resulted in a higher demand for temporary accommodation facilities. In response to this development, this study presents the structural design of an eight-story reinforced concrete hotel building located on Sepakat II Street in Pontianak City. The structure is designed using an Intermediate Moment-Resisting Frame (IMRF) system to ensure adequate performance under seismic loading conditions. The structural design process was carried out in accordance with the applicable Indonesian National Standards (SNI). Structural analysis was conducted using ETABS software to evaluate the building’s behavior under gravity and earthquake loads, while technical drawings were prepared using AutoCAD and SketchUp. The building utilizes concrete with a compressive strength of f’c = 30 MPa and reinforcing steel with a yield strength of fy = 420 MPa. The seismic performance of the structure was evaluated through several parameters, including mass participation ratios, inter story drift limits, natural period verification, and P-Delta effects. The analysis results show that the structural system satisfies all required performance criteria, indicating that the building is capable of resisting seismic forces safely and efficiently. The slab system consists of D10 main reinforcement bars and Ø8 shrinkage reinforcement bars, with slab thicknesses of 150 mm for the roof, 130 mm for typical floors (Levels 1–8), and 160 mm for stair landings. The primary beams (B1) have cross-sectional dimensions of 300 × 600 mm and are reinforced with D19 longitudinal bars, D13 shear reinforcement, and D19 torsional reinforcement. Secondary beams (B2) measure 200 × 400 mm and use D16 longitudinal bars, D13 shear reinforcement, and D16 torsional reinforcement. Columns have a uniform cross-section of 700 × 700 mm and are reinforced with 20D22 longitudinal bars and D13 transverse reinforcement. The foundation system consists of three types of pile foundations using 200 × 200 mm precast concrete piles with reinforced pile caps designed to accommodate varying structural loads.
Utilization of HDPE (High Density Polyethylene) Plastic Waste as A Substitute for Some Cement in the Compressive Strength of Paving Blocks Alaydrus, Syarifah Umi Qurani; Wicaksono, Kukuh Ary; Rabihati, Etty; Hafiyyan, Qalbi
International Journal of Research in Vocational Studies (IJRVOCAS) Vol. 5 No. 4 (2026): IJRVOCAS - Special Issues - Hybrid International Conference on Construction, Ma
Publisher : Yayasan Ghalih Pelopor Pendidikan (Ghalih Foundation)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53893/ijrvocas.v5i4.300

Abstract

Even in Indonesia, people are starting to take notice of the growing problem of plastic waste in the environment. West Kalimantan is one of many areas in Indonesia that still struggles with garbage management. Waste production will rise in tandem with the population. Hence, one possible solution to this insufficient waste problem is the production of paving blocks from plastic waste. Based on the findings, high-density polyethylene (HDPE) plastic material can replace some of the cement in paving block production. This study employs an experimental approach by fabricating paving blocks with plastic as a partial substitute for cement. A type of plastic known as High Density Polyethylene (HDPE) is utilized. As part of the curing process, two kinds of water PDAM water and peat groundwater are used. Paving blocks made with 0%, 2.5%, 5%, 7.5%, 10%, or 12.5% HDPE plastic as a partial cement substitute have a significant impact on the compressive strength of the finished product. At 14 days, the highest compressive strength value was achieved with a 2.5% plastic mixture curing in PDAM water at 21.163 MPa, followed by 20.472 MPa with peat soil water; at 28 days, the highest value was 19.403 MPa with 0% PDAM water, and at 19.32 MPa with 2.5% peat water. Paving blocks made with plastic as a partial cement substitute have an even greater absorption capacity after 14 and 28 days. The plastic paving block with a 2.5% peat variation absorbed 5.1% of the groundwater and the plastic mixture with no PDAM absorbed 4.6% of the water. It follows that high-density polyethylene (HDPE) plastic is not very good at absorbing water.
Utilization of Shell Waste as Fine Aggregate in K225 Quality Concrete Utomo, Satriyo; Rahmasari, Puspita; Supardi, Iwan; Riyanti, Eva; Robert
International Journal of Research in Vocational Studies (IJRVOCAS) Vol. 5 No. 4 (2026): IJRVOCAS - Special Issues - Hybrid International Conference on Construction, Ma
Publisher : Yayasan Ghalih Pelopor Pendidikan (Ghalih Foundation)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53893/ijrvocas.v5i4.307

Abstract

Conventional concrete materials derived from natural resources cause environmental problems. This encourages the development of concrete using recycled materials for sustainability reasons. One such material is shellfish, which is used to replace aggregates in concrete, both fine and coarse aggregates. This study conducted an experimental study using shellfish waste as a fine aggregate in a concrete mixture. Utilization of shellfish waste not only reduces environmental problems but can also provide economic value to construction, as well as an effort to conserve natural resources. Shellfish waste was obtained from the coast of Mempawah Regency. The planned test specimens were 15x15x15 cm cubes with a target quality of K225 kg/cm². The test specimens were made with a composition of sand with shellfish sand in proportions of 0%, 5%, 7%, 9%, and 100%. Physical properties of shellfish sand were tested, slump tests were conducted to determine the effect of shellfish sand on concrete viscosity, and concrete compression tests were conducted at the age of 28 days to determine the effect of shellfish sand on concrete strength. The compressive strength test results with 0% substitution = 246.22 kg/cm² or 24.15 MPa. 5% substitution = 211.98 kg/cm² or 20.79 MPa, resulting in a 5.79% decrease in quality. 7% substitution = 195.10 kg/cm² or 19.3 MPa, resulting in a 13.29% decrease in quality. 9% substitution = 176.14 kg/cm² or 17.27 MPa, resulting in a 21.72% decrease in quality. 100% substitution = 155.56 kg/cm² or 15.25 MPa, resulting in a 30.86% decrease in quality. The greater the substitution of the shell sand mixture, the greater the decrease in quality.
Design and Construction of Lightweight Steel Roof Structure for Kaleles Sapi Kerapan Sumenep Ishaq; Firatama, Aditya Dandy; Triono, Ipung Wisnu; Ifan, Mohammad
International Journal of Research in Vocational Studies (IJRVOCAS) Vol. 5 No. 4 (2026): IJRVOCAS - Special Issues - Hybrid International Conference on Construction, Ma
Publisher : Yayasan Ghalih Pelopor Pendidikan (Ghalih Foundation)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53893/ijrvocas.v5i4.463

Abstract

The need for efficient and environmentally friendly building construction demands innovation in material selection and structural design, including the use of lightweight steel roofs. This study aims to design a lightweight steel roof structure adopting the Kaleles Sapi Kerapan design in Sumenep that safely withstands loads, efficiently uses materials, and supports solar panel integration as an alternative energy source. The methodology includes literature study, geometry and material data collection, and numerical modeling using SAP2000 v22.0.0 Ultimate software with linear static analysis according to SNI 7971:2013. Loads analyzed include dead load, live load, and wind load with various combinations. Simulation results indicate the roof frame design has strength ratios below 1 and is therefore safe. The total material requirements include C75 trusses, battens, braces, screws, spandek sheets, and ridge elements in measured quantities. This lightweight steel roof design is structurally feasible, economical, and supports sustainable building concepts.
Evaluation of Drainage System Performance in Flood Control Efforts in Benua Melayu Darat Subdistrict, Pontianak City Kurniawan, Pramudya; Ryanti, Eva; Syahrani, Deny; Muhtadi, Ahmad; Rabihati, Etty; Hafiyyan, Qalbi
International Journal of Research in Vocational Studies (IJRVOCAS) Vol. 5 No. 4 (2026): IJRVOCAS - Special Issues - Hybrid International Conference on Construction, Ma
Publisher : Yayasan Ghalih Pelopor Pendidikan (Ghalih Foundation)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53893/ijrvocas.v5i4.481

Abstract

Benua Melayu Darat, located in South Pontianak Regency, relies heavily on artificial drainage systems to control surface runoff and flooding. However, the area still frequently experiences flooding during high rainfall intensity. Therefore, this study was conducted to evaluate the performance of the drainage system in Benua Melayu Darat District from a hydraulic and non-technical perspective and to identify the dominant factors contributing to channel dysfunction. The evaluation began with hydrological and domestic wastewater analyses to determine the total water volume to be accommodated by the existing channels. A hydraulic analysis was then conducted to determine the channel’s design discharge. Direct field measurements were performed to assess channel dimensions and flow velocity, and non-technical analyses were conducted of sedimentation, waste, and land cover. The results showed that 45% of channels in Benua Melayu Darat District had inadequate capacity to accommodate rainfall and domestic wastewater. Non-technical factors, such as uncontrolled sedimentation rates and garbage blockages, also significantly disrupted channel function. This study shows the need to normalise dimensions and channels, implement low-impact development systems, such as retention ponds, strengthen maintenance programs to ensure adequate drainage, and provide public education on how to maintain or protect the environment to prevent flooding.
The Effect of Variations of Mussels and Egg Shells on SCC (Self-Compacting Concrete) Damara, Yusril; Fahrudin, Muhammad; Haryani, Susi; Setiawan, Randy
International Journal of Research in Vocational Studies (IJRVOCAS) Vol. 5 No. 4 (2026): IJRVOCAS - Special Issues - Hybrid International Conference on Construction, Ma
Publisher : Yayasan Ghalih Pelopor Pendidikan (Ghalih Foundation)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53893/ijrvocas.v5i4.482

Abstract

Self-Compacting Concrete (SCC) could flow and fill molds without compaction (vibrator). use of cement in concrete mixes is crucial, resulting in increasing construction projects. Therefore, ideas or innovations are needed to reduce cement use by utilizing shellfish and eggshells as cement substitutes. This study used a quantitative method taken through experiments aimed at observing the effect of adding shells and eggshells as cement substitutes in Self-Compacting Concrete (SCC) concrete, with variations in eggshell substitution of 0%, 1.5%, 2.5%, 3.5%, and 4.5%, as well as a shell substitution of 5%, with a concrete compressive strength of 21 MPa, made of cylinders with a diameter of 15 cm and a height of 30 cm, testing fresh concrete using the slump flow method and concrete compressive strength testing was carried out at the ages of 3 days, 7 days, and 28 days. The compressive strength test results for the 28-day immersion in PDAM water yielded a maximum concrete compressive strength of 39.71 MPa at the 1.5% variation, and a minimum compressive strength of 31.22 MPa. The 7-day immersion in PDAM water yielded a maximum compressive strength of 26.35 MPa at the 1.5% variation, and a minimum compressive strength of 21.76 MPa at the 4.5% variation. Furthermore, for the 3-day immersion, the highest compressive strength at the 1.5% variation, with a compressive strength of 27.50 MPa, and the minimum achieved at the 4.5% variation, with a compressive strength of 24.07 MPa.

Page 24 of 25 | Total Record : 242

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