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All Journal JTT (Jurnal Teknologi Terpadu) Jurnal Penelitian Pendidikan IPA (JPPIPA) Jurnal Komposit : Jurnal Ilmu-Ilmu Teknik Sipil Journal of Applied Civil Engineering and Infrastructure Technology (JACEIT) Kontribusi: Jurnal Penelitian dan Pengabdian Kepada Masyarakat Jurnal Talenta Sipil SENTRI: Jurnal Riset Ilmiah Journal of Civil Engineering and Vocational Education
Utomo, Gunaedy
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Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Physics Transportation

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Pengaruh Penggunaan Polyethylene Terephthalate sebagai Agregat Halus terhadap Kuat Lentur Beton Kusuma, Santos Surya; Indriani, Andi Marini; Utomo, Gunaedy
Jurnal Komposit: Jurnal Ilmu-ilmu Teknik Sipil Vol. 8 No. 2 (2024)
Publisher : Universitas Ibn Khaldun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32832/komposit.v8i2.15097

Abstract

The use of plastic in the city of Balikpapan in currently often used in daily activities, causing plastic waste in the city of Balikpapan to contribute up to 17% of the total waste production. The use of plastic in the world of construction has begun by using PET (Polyethylene Terephthalate) plastic as a concrete mixture. With its utilization, it can be a solution to reduce the production of plastic waste in the city of Balikpapan. In this research, PET plastic was used as a concrete mixture with a percentage of 0.7% and combined with local materials from East Kalimantan as a form of supporting the relocation of the state capital to East Kalimantan province. The purpose of this study was to determine the effect of using PET type plastic as fine aggregate on the flexural strength of concrete. The method used in this study is the experimental method with a test sample measuring 15x15x60 cm. The test results showed that normal concrete got a slump value of 10 cm and the PET variation was 7% 9 cm with the flexural strength test results of normal concrete with a curing period of 14 and 28 days getting a value of 3,044 MPa and 3,188 MPa, PET variations of 0.7% 14 and 28 days got a value of 2,370 MPa and 2,423 MPa, based on the results of this study it can be concluded that the use of PET plastic as fine aggregate experienced a decrease in the quality and weight of the sample due to the smooth and slippery texture of PET plastic causing the concrete mixing process to be poor.
Pengaruh Temperatur Pelelehan Plastik Polyethylene Terephthalate terhadap Kuat Tekan Eco-Paving Block Ramadhan, Atma Haical; Utomo, Gunaedy; Indriani, Andi Marini
Jurnal Komposit: Jurnal Ilmu-ilmu Teknik Sipil Vol. 9 No. 2 (2025)
Publisher : Universitas Ibn Khaldun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32832/komposit.v9i2.17719

Abstract

Sampah merupakan salah satu tantangan kehidupan yang kerap menjadi perhatian masyarakat Indonesia, khususnya di kota-kota besar. Peningkatan produksi sampah apabila tidak dikelola dan dimanfaatkan dengan baik dapat merusak lingkungan sekitar. Salah satu jenis sampah yang paling banyak dijumpai berasal dari sampah plastik PET seperti plastik kemasan botol minuman. Pada penelitian ini, plastik PET digunakan sebagai bahan pengganti semen pada pembuatan paving block. Tujuan dari penelitian ini adalah untuk mengetahui karakteristik Paving Block dengan memanfaatkan plastik PET dengan suhu 240 ° C, 260 ° C, 280 ° C sebagai bahan perekat kuat tekan sesuai dengan SNI 03-0691-1996. Objek penelitian ini adalah melakukan penelitian terhadap paving block dengan campuran plastik Polyethylene Terephthalate (PET) dengan presentase 30% dengan temperatur 240 ° C, 260 ° C, 280 ° C. Hasil penelitian menunjukkan bahwa pada temperatur 280 ° C dengan variasi 30%:70% diperoleh kuat tekan dengan rata-rata 15,238 MPa masuk mutu C dibandingkan dengan variasi yang lain. Pada temperatur 260 ° C dengan variasi 30%:70% diperoleh juga kuat tekan tertinggi dengan rata-rata 15,873 MPa masuk mutu C. Sedangkan pada temperatur 240 ° C nilai kuat tekan mengalami penurunan dengan rata-rata 13,571 MPa masuk mutu C.
Penerapan Metode Time Cost Trade Off (TCTO) pada Proyek Pembangunan Peningkatan Gedung Dinas Pekerjaan Umum Kota Balikpapan Ramadhan, Nadhilah Nur; Utomo, Gunaedy; Pratiwi, Reno
Jurnal Talenta Sipil Vol 9, No 1 (2026): Februari
Publisher : Universitas Batanghari Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33087/talentasipil.v9i1.1107

Abstract

Delays in project work can be anticipated by accelerating its implementation. In accelerating the project, it must be well planned by using various acceleration alternatives. Alternatives that can be used to accelerate the project are by adding working hours, adding labor, or a combination of both. The purpose of this study is to analyze the application of the Time Cost Trade Off method with alternative acceleration of adding working hours and alternative acceleration of adding labor. The method used is a case study on the Balikpapan City Public Works Department Building Improvement Construction Project with a duration of 174 calendar days by finding the critical path using Microsoft Project and then crashing to obtain the cost slope of activities on the critical path. The results of this study obtained the optimal alternative is the acceleration alternative of adding the number of crashing 3 labor with the duration required to complete the project is 68.89 days at a cost of Rp7.770.887.756. which is the acceleration alternative that has the lowest cost of other acceleration alternatives.
Penerapan Metode PDM dan Pert pada Proyek Pembangunan Pusat Layanan Haji dan Umroh Terpadu Kota Balikpapan Purwanto, Azan Yamani; Utomo, Gunaedy; Pratiwi, Reno
Jurnal Talenta Sipil Vol 9, No 1 (2026): Februari
Publisher : Universitas Batanghari Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33087/talentasipil.v9i1.873

Abstract

The construction of the Integrated Hajj and Umrah Service Center (PLHUT) in Balikpapan City is a construction project that requires effective time management to ensure timely completion. This study aims to analyze the critical path and the probability of successful project completion using the Precedence Diagram Method (PDM) and Program Evaluation and Review Technique (PERT). The PDM method is utilized to identify the project’s critical path by structuring the interdependencies of work items, visualized through a network diagram. Meanwhile, the PERT method is employed to calculate the probability of project completion within the planned duration, taking into account the uncertainties in activity durations. Based on the analysis results, the PLHUT construction project in Balikpapan City, with a planned duration of 160 days, contains several critical activities that require careful resource management and scheduling. The probability calculation using the PERT method indicates a high likelihood of completing the project on time. Thus, the combination of PDM and PERT methods serves as an effective approach in construction project management to enhance efficiency and schedule accuracy.
Schedule Actual Proyek dengan Metode Precedence Diagram Method (PDM) dan Program Evaluation and Review Technique (PERT ) pada Proyek Pembangunan Pasar Muwaffa, Muhammad Kholish; Utomo, Gunaedy; Pratiwi, Reno
Jurnal Talenta Sipil Vol 9, No 1 (2026): Februari
Publisher : Universitas Batanghari Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33087/talentasipil.v9i1.1136

Abstract

The construction and development of the Klandasan Block C Market Distribution Facility in Balikpapan City is a strategic construction project that plays an important role in supporting the economic activities of the local community. This project requires optimal planning and time management to ensure that all stages of the work can be completed according to the target. Problems that often arise in the implementation of construction projects are delays due to uncertainty in the duration of activities and a lack of synchronization between interdependent activities. Therefore, this study was conducted with the aim of identifying critical paths and calculating the probability of successful project completion using the Precedence Diagram Method (PDM) and Program Evaluation and Review Technique (PERT) approaches. The PDM method is used to describe the dependency relationships between activities, determine the critical path, and identify activities that have the potential to cause delays. Meanwhile, the PERT method is applied to estimate the project completion time by considering the variability of activity duration through three time estimates, namely optimistic, realistic, and pessimistic. The analysis results show that the project has several activities that are classified as critical and require intensive monitoring of resource allocation to prevent schedule deviations. Based on the calculations, projects with a planned duration of 150 days have a high probability of being completed on time. In conclusion, the combination of PDM and PERT methods provides effective results in the process of planning and controlling project schedules, helping project managers determine activity priorities, optimize time efficiency, and minimize the risk of construction delays.
Analisis Keterlambatan pada Proyek Peningkatan Gedung Kantor DPU Kota Balikpapan Menggunakan Lean Six Sigma Framework Bunga, Hesra; Utomo, Gunaedy; Pratiwi, Reno
Jurnal Talenta Sipil Vol 9, No 1 (2026): Februari
Publisher : Universitas Batanghari Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33087/talentasipil.v9i1.1134

Abstract

Construction project delays are a common problem that can have a significant impact on time efficiency, costs, and the quality of work. Therefore, a systematic and data-driven management approach is needed to identify the main causes of delays and determine the appropriate improvement strategies. This study aims to analyze the factors causing delays in the Balikpapan City Public Works Office (DPU) building improvement project using the Lean Six Sigma approach through the Define, Measure, Analyze, Improve, and Control (DMAIC) stages. The research data was obtained from project documents, field observations, interviews, and questionnaires administered to workers and project supervisors. The analysis was conducted using Pareto charts, comparisons of planned and actual workforce allocations, and fishbone diagrams to identify the root causes of delays. The results of the study show that the dominant factors causing project delays are human resources aspects, particularly the mismatch between the number of workers available and the work requirements in a given period, as well as the transfer of workers to other projects. Meanwhile, factors such as machinery, work methods, materials, and environmental conditions were not found to have a significant impact on project delays, as most were considered to be in fairly good condition and did not hinder the work process. Based on the results of this analysis, the recommended improvement strategies include improving worker attendance monitoring, adjusting worker allocation according to the needs of each stage of the project, and recruiting additional workers during periods of high workload
The Effect of Land Slopes Covered with Paving Blocks on Rainwater Infiltration Indriani, Andi Marini; Utomo, Gunaedy
Jurnal Penelitian Pendidikan IPA Vol 12 No 1 (2026)
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v12i1.12668

Abstract

Rapid urban development has increased impervious surface coverage, causing higher surface runoff and reduced rainwater infiltration that contribute to flooding and groundwater depletion. Permeable pavement systems, such as paving blocks, are widely applied to support sustainable urban water management. This study analyzes the effect of land slope covered with hexagonal paving blocks on rainwater infiltration performance. Laboratory experiments were conducted using a rainfall simulator with a constant intensity of 50 mm/h. Three slope variations were evaluated, namely 0%, 2%, and 4%. The paving blocks had a compressive strength of 25 MPa (Class B) and were installed on a compacted sandy bedding layer. Infiltration and surface runoff volumes were measured at five-minute intervals until stable conditions were achieved. Results indicate that land slope significantly influences infiltration behavior. The highest infiltration performance occurred at a 2% slope, with a maximum infiltration volume of approximately 570 mL recorded between the 40th and 45th minutes. Conversely, the 0% slope showed decreased infiltration due to soil saturation, while the 4% slope exhibited lower efficiency because the increased slope accelerated surface runoff. These findings demonstrate that hexagonal paving blocks installed on a moderate slope enhance infiltration, reduce runoff, and support urban flood mitigation and groundwater recharge.
Analisis Hubungan Antar Pekerjaan pada Proyek Rumah Tinggal dengan Perencanaan Microsoft Project: (Studi Kasus Proyek Pembangunan Rumah Tinggal, Kecamatan Balikpapan Selatan, Kota Balikpapan, Kalimantan Timur) Gurning, Monica; Utomo, Gunaedy; Pratiwi, Reno
SENTRI: Jurnal Riset Ilmiah Vol. 5 No. 3 (2026): SENTRI : Jurnal Riset Ilmiah, Maret 2026
Publisher : LPPM Institut Pendidikan Nusantara Global

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55681/sentri.v5i3.6006

Abstract

Every construction project has specific targets that must be achieved at each stage of its planning. Within such a project, there exists a series of interrelated work activities, each with defined completion limits. Therefore, the initial and most crucial step is to develop a well-structured plan to ensure that project implementation can be properly controlled using an appropriate scheduling method. One method that can be applied is the Precedence Diagram Method (PDM), which provides detailed information related to project activities, including start time, duration, finish time, and total float, represented within interconnected rectangular nodes through various types of dependency relationships. This method enables the identification of activities that have the potential to cause delays if postponed, thereby forming the critical path that determines the overall project success. Along with technological advancements, project scheduling has become more efficient with the aid of specialized software such as Microsoft Project, which in this study is utilized to implement the PDM method in analyzing interrelated project activities. In this project scheduling, there are 175 constraints consisting of 73 Start-to-Start (SS), 101 Finish-to-Start (FS), and 1 Finish-to-Finish (FF) relationship. A total of 55 activities are identified as part of the critical path, indicating that any delay in these activities will directly impact the overall project completion time.
Co-Authors Al Hidayat, Fauzi Amirudin Amirudin Andi Marini Indriani, Andi Marini Anggraeni, Rosalin Delia arlita, reggina gita Bunga, Hesra Casmudi, Casmudi Damayanti, Dinda Indah Fauzi, Muhammad Muis Gurning, Monica Harami, Fachruddin Hidayatullah, Muhammad Fitrah Ikram, Muhammad Fadhli Dzil Indriani, Andy Marini Indriyani, Andi Marini Khoiriyah, Dewi Isroul Kusuma, Santos Surya Maslina, Maslina Muwaffa, Muhammad Kholish Natalia Natalia Natasya, Priskha Tri Ochtharima, Zaerima Zahira Purwanto, Azan Yamani Ramadhan, Atma Haical Ramadhan, Nadhilah Nur Reno Warni Pratiwi Sani, Abdu Saputri, Evi Ari Ayu Syahputra, M Ryan Tesiana, Selina Vetryx, Vanessa Regina Yacub, Muh Alpian