Jurnal Manajemen Teknologi & Teknik Sipil
Title : Jurnal Manajemen Teknologi dan Teknik Sipil (JURMATEKS) Initials : JURMATEKS Publications : Biannual (June and December) DOI : Prefix 10.30737 by crossref Acreditation : SINTA 4, SK.230/E/KPT/2022, December 30, 2022 Online ISSN : 2621-7686 Editor-in-chief : DWIFI APRILLIA KARISMA, ST.,MT Citation Analysis : Scopus|Dimensions|Google Scholar Publisher : Kadiri University ORCID : https://orcid.org/ 0009-0008-9077-7775 Journal of Technology Management and Civil Engineering (JURMATEKS) e-ISSN 2621-7686 is a peer-reviewed journal that aims for the publication and dissemination of original research articles on the latest developments in all fields of civil engineering science and technology. This journal publishes original papers in Indonesian, which contribute to the understanding of civil engineering and technology improvement. JURMATEKS aims to achieve state-of-the-art in theory and application of civil engineering. JURMATEKS provides a forum for academics and scientists throughout Indonesia to promote, share, and discuss new issues and developments in civil engineering construction and education.
Authors who publish with this journal agree to the following terms: (1) The copyright of published articles will be transferred to the journal as the publisher of the manuscript. Therefore, the author needs to confirm that the copyright has been managed by the publisher with the Publication Right Form which must be attached when submitting the article. (2) Publisher of JURMATEKS is Kadiri University. (3) The copyright follows Creative Commons Attribution-ShareAlike License (CC BY SA): This license allows to Share copy and redistribute the material in any medium or format, Adapt remix, transform, and build upon the material, for any purpose, even commercially.
Efisiensi Proyek Perumahan Green Teksin Tegal melalui Rekayasa Nilai: Pendekatan AHP dan Analisis Biaya Siklus Hidup
The construction sector significantly contributes to Indonesia's economic growth. However, this sector continues to face challenges in achieving cost efficiency and sustainability, particularly in medium-scale housing projects. This study aims to evaluate the application of Value Engineering (VE) in the Green Teksin Tegal Phase 2 Housing Project, focusing on optimizing material selection, construction techniques, and project management to enhance efficiency and effectiveness. A combined quantitative and qualitative methodology was utilized, incorporating the Analytical Hierarchy Process and Life Cycle Cost Analysis. Data collection involved project documentation reviews, structured stakeholder interviews, and site observations. Findings identified substantial cost-saving alternatives, including thin plastering (skimming), low cement-sand mixture concrete blocks, and laminated High-Density Fiberboard doors. These alternatives demonstrated savings of approximately 8.46%, 16.81%, and 20%, respectively. The study acknowledges obstacles such as fluctuating material prices, environmental regulations, and stakeholder preferences, recommending strategic solutions to mitigate these issues. The project's long-term economic viability and environmental sustainability can significantly improve by addressing these challenges. This research contributes valuable insights into cost-effective project execution, highlighting Value Engineering’s potential to enhance future residential construction projects' quality, sustainability, and economic viability, ultimately benefiting broader urban development and environmental conservation initiatives.
Copyright (c) 2025 Benny Hermana Putra, Dewi Ayu Wulandari https://creativecommons.org/licenses/by-sa/4.0
Studi Mekanisme Kelongsoran dan Alternatif Penanganan Tanah Lunak Pada Ruas Jalan Tol Indrapura – Kisaran (STA 112+850 – STA 112+900)
Embankment stability is a critical aspect of transportation infrastructure projects, especially in constructing on soft soil. Soft soil has low bearing capacity, high compressibility and low permeability. These characteristics increase the risk of structural failure, such as landslides and excessive settlement necessitating appropriate reinforcement methods. Beyond safety consedirations, soil strengthening must also factor in cost-effectiveness and construction time to ensure an efficient and economical approach. This study aims to evaluate the effectiveness of Prefabricated Vertical Drain (PVD), geotextile, spun pile, as well as a combination of PVD and geotextile reinforcement methods. Field investigations and laboratory test provided soil and geometric data. This data is used as input in modeling using a finite element approach with Plaxis 2D software. The analysis results include safety factor (SF) values, ​​which are then calculated for strengthening costs and implementation time. A multi-criteria analysis is employed to determine the most optimal reinforcement method based on SF, cost, and implementation duration. The results indicate that the combination of PVD and geotextile provides the highest value, with a safety factor of 1.73, construction costs of IDR 1.57 billion, and implementation duration of 90 days. This strengthening is able to balance the three aspects considered. The combination of PVD which accelerates consolidation and geotextiles which strengthen the embankment structure has been proven to increase stability without significantly increasing costs. These findings contribute to the optimization of soft soil strengthening strategies in selecting efficient and economical strengthening methods.
Copyright (c) 2025 Adnan Haririi, Herman Wahyudi, Yudhi Lastiasih https://creativecommons.org/licenses/by-sa/4.0
Analisis Alternatif Kelongsoran Bendungan Ameroro Pada Batuan Sekis Dengan Metode Elemen Hingga
The geological characteristics of Ameroro Dam, dominated by schist metamorphic rocks, make this highly vulnerable to weathering, leading to reduced material strength and slope stability. This is exacerbated by rain infiltration which increases pore water pressure and earthquake loads which can trigger soil mass movement, causing a decrease in the slope safety factor.This study aims to evaluate the effect of a combination of environmental factors on slope stability using the finite element method. The research utilizes Plaxis 2D software to simulate various slope conditions under different scenarios, including static conditions, rain infiltration, and seismic loads. The results indicate that Under static conditions, the SF was 2.204, which decreased to 1.867 after rain infiltration, highlighting the adverse impact of water infiltration. To address these challenges, different reinforcement strategies were evaluated. The most effective solution was found to be the combination of 20 cm thick shotcrete, retaining wall, and 5-meter anchor, which increased the SF to 1.81, even under rain infiltration conditions. This combination enhances slope stability by providing surface protection, lateral support, and deep anchorage, effectively distributing loads and minimizing deformation risks. The findings can be the basis for developing optimized slope reinforcement strategies for dams with complex geological conditions.
Copyright (c) 2025 Herdy Setiawan, Trihanyndio Rendy Satrya https://creativecommons.org/licenses/by-sa/4.0
Optimasi Waktu dan Biaya Proyek Gelanggang Olahraga Kalimantan Selatan dengan Metode Time Cost Trade-Off
Construction projects often face delays and cost overruns due to material delays, labor shortages, and adverse weather. In the Sports Building project in South Kalimantan, a 17-day delay beyond the planned 270-day schedule increased costs, risk of penalties, and threatened the contractor’s reputation and project sustainability. Therefore, accelerating completion is essential to reduce losses. Overtime on critical path activities is a common acceleration method but requires careful analysis since excessive overtime can reduce productivity and raise costs. This study aims to analyze alternatives for accelerating the duration of the construction of a sports arena in South Kalimantan using the Time Cost Trade-Off (TCTO) method. TCT) method is applied, focusing on adding 2, 3, and 4 hours of overtime per day on critical path tasks. The approach integrates actual project data, regulations, and productivity factors to develop effective acceleration strategies. Results show that adding 3 hours of overtime daily is the most efficient, reducing duration from 287 to 283 days and saving IDR 71,652,415.38. However, the 270-day target is not yet met, requiring further crashing. This paper presents only one crashing iteration as a practical simulation to demonstrate the method and potential outcomes. Future crashing will focus on tasks with the lowest cost slope while considering task dependencies.
Copyright (c) 2025 Endah Widiastuti, Maesa Fitri Sugiarti, Candra Yuliana, Abdul Karim https://creativecommons.org/licenses/by-sa/4.0
Karakterisasi Mortar Geopolimer terhadap Penambahan Kapur Berbasis Abu Terbang dan ASP dengan NaOH 10 Molar
Cement which is the main material for making concrete has a negative impact on environmental, namely producing carbon emissions. One alternative to overcome this, is the use of fly ash and rice husk ash as a cement substitute. The addition of lime, which is a form of CaO, functions to increase the reactive properties of class C fly ash. The concrete curing process is carried out at room temperature, because the properties of lime itself speed up the hardening process. This research aims to determine the best ratio for adding lime in terms of compressive strength, porosity and setting time. Lime was added with several variations, namely 1%, 2.5%, 5%, 7.5%, and 0% as a control. The results of this research on the addition of lime to geopolymer mortar are reducing the compressive strength value, increase porosity, and extends setting time. Mortar with 7.5% lime compared to 1% lime, has lower compressive strength (1.12 MPa: 7.70 MPa), higher porosity (32.91%: 18.72%), and longer setting time (270 minute: 240 minute). However, if mortar with 1% lime compared to normal gepolymer without lime, has better results. Higher compressive strength (7.70 MPa: 5.63 MPa), lower porosity (18.72%: 22.93%), and fast setting time (240 minute: 495 minute). So the results of this research, a slight change in the lime portion can make a significant difference, excessive additions will disrupt the geopolymer reaction.
Copyright (c) 2025 Maria Enjelina Sibuea, A. Wardhono https://creativecommons.org/licenses/by-sa/4.0
Strategi Pengembangan Sertifikasi Kompetensi Tenaga Kerja Konstruksi Di Provinsi Sumatera Selatan Berbasis Kebutuhan dan Analisis SWOT
Construction workforce certification is a critical issue in Indonesia's infrastructure development sector, as mandated by the Construction Services Law requiring all construction workers to obtain Work Competency Certificates (SKK). This study aims to formulate strategies for developing construction workforce construction workers in South Sumatra Province through the integration of demand analysis and SWOT analysis. A quantitative approach was applied, where secondary data were used to project certification needs for 105 construction projects planned under the 2025-2029 State Budget. In addition, primary data were collected through questionnaires and interviews identify key factors influencing SKK acquisition, which were then incorporated into the SWOT framework for strategic. Results revealed that while expert-level certification (Levels 7-9) needs are met with 1,792 certified professionals available, significant shortages exist at the technician/analyst level (Levels 4-6) with a gap of 2,139 positions and at the operator level (Levels 1-3) with a substantial deficit of 48,882 certified workers. Factor analysis identified self-motivation, wage increase prospects, time constraints, regulatory sanctions, and enhanced employment opportunities as key determinants in SKK acquisition decisions. The SWOT analysis concluded that a Strength-Opportunity (SO) strategy would be most effective, leveraging regulatory frameworks, digital certification processes, educational institution collaborations, and on-site certification to address the certification gaps. This research provides evidence-based recommendations for policymakers to develop targeted interventions that can strengthen construction workforce capacity and ensure compliance with national standards.
Copyright (c) 2025 Vanny Oktarina Mangindaan, Heni Fitriani, Doedoeng Zainal Arifin https://creativecommons.org/licenses/by-sa/4.0
Analisis Pengaruh Infiltrasi Hujan Terhadap Stabilitas Lereng STA 62+450 S/D 62+825 Pada Proyek Jalan Tol Seksi Sp. Indralaya – Prabumulih Dengan Software Geo Studio
The construction of the Indralaya-Muara Enim Interchange Toll Road, especially the Indralaya-Prabumulih Interchange Section, was hampered by landslides after excavation was carried out between STA 62+450 to 62+825. The combination of steep slopes and rain infiltration weakened the soil structure, increasing the risk of landslidesThis research aims to analyze the effect of rainwater infiltration on slope stability on the Sp Section Toll Road Project. Indralaya–Prabumulih. The research methodology used was to analyze landslide slope areas using the Slope/W and Seep/W programs from Geo Studio. This study evaluated different excavation heights and an initial excavation slope of 1:3. The focus is on calculating the safety factor (SF) at varying rain durations (1 hour, 3 hours, and 5 hours), with SF values ​​below 1.5 indicating instability. The Safety Factor (SF) value of the existing soil before excavation was 1.58, but after 1 hour of rain, the SF decreased to 1.33 (15.66% decrease). After 3 hours, SF dropped to 1.13 (28.34% decrease), and reached 1.10 (30.24% decrease) after 5 hours. Strengthening slopes using the Hydroseeding method increases SF to 1.83, while the use of Retaining Wall increases SF more significantly to 2.54. This research reveals the impact of rain infiltration on soil stability and proves the effectiveness of slope strengthening methods. These results are an important basis for planning effective landslide mitigation on toll road excavations.
Copyright (c) 2025 Tiara Oktaliyani, Ria Asih Aryani Soemitro, Trihanyndio Rendy Satrya https://creativecommons.org/licenses/by-sa/4.0
Studi Eksperimental High Volume Fly ash Self-Compacting Concrete (HVFA SCC) dengan Penambahan 5% Silica Fume terhadap Sifat Reologi dan Mekanik
The development of concrete technology is an important part of supporting sustainable development. This development not only focuses on easy and efficient working methods, but also encourages the use of environmentally friendly materials such as fly ash and silica fume. This research aims to investigate the effect of varying fly ash content with the addition of silica fume on the mechanical and rheological properties of High Volume Fly ash Self-Compacting Concrete (HVFA SCC). Variations in fly ash content (0%, 50%, 55%, 60%, and 65%) with the addition of 5% silica fume. The parameters evaluated include flowability, compressive strength, and permeability. Optimal flowability (750 mm) was achieved at 50–55% fly ash, making it suitable for complex structural applications. Compressive strength peaked at 48.7 MPa with 50% fly ash due to a balance of cement hydration and pozzolanic reactions, while higher fly ash content led to slight reductions. Permeability significantly decreased as fly ash content increased, from 84.1 mm at 0% fly ash to 6.08 mm at 65%, indicating enhanced matrix densification and water resistance due to fly ash's filler effect and pozzolanic activity. The study concludes that 50% fly ash offers the optimal balance, achieving a flowability of 720 mm, compressive strength of 48.7 MPa, and permeability of 58.7 mm. This research shows the potential of fly ash and silica fume as complementary materials to improve the performance of SCC, while recommending a balanced mix design between workability, strength and durability, supporting the development of environmentally friendly and sustainable concrete.
Copyright (c) 2025 Tiorivaldi, Adji Putra Abriantoro https://creativecommons.org/licenses/by-sa/4.0
Kajian Kinerja Kombinasi Filler Tanah Putih dan Abu Sekam Padi pada Campuran Aspal AC-WC
The high cost and limited availability of conventional fillers in several regions necessitate the exploration of local alternative materials. This study investigates the potential use of white soil (limestone) and rice husk ash (RHA) as alternative fillers in Asphalt Concrete–Wearing Course (AC-WC) mixtures. The experimental research was conducted at the Kupang State Polytechnic Laboratory. White soil was sourced from East Penfui, while rice husk ash was collected from Oesao. Filler variations of 0%, 0.5%, 1%, 1.5%, and 2% were tested on 63 specimens in accordance with Bina Marga 2018 specifications. Marshall tests were performed to evaluate stability, VIM, VMA, VFA, flow, and MQ parameters. The results show that white soil filler optimally increased density and achieved desirable VIM and VMA values up to 1.5%, while rice husk ash enhanced flexibility but tended to increase voids at higher percentages. The optimum combination of both fillers was found at 0.75% total filler content, fulfilling all Marshall parameter standards specified by Bina Marga 2018. This study concludes that a carefully optimized combination of white soil and RHA is a viable, economical, and sustainable alternative filler for AC-WC pavement layers.
Copyright (c) 2025 Dewi Anastasia Ipah Wuwur, Vinsensius Budiman Pantas, Mateus Rikardus Sodanango, Reza Bernadus Mbau https://creativecommons.org/licenses/by-sa/4.0
Perencanaan Sistem Penyaliran Tambang Batubara Sump RL 16 HW Barat Pit Tutupan, PT Pamapersada Nusantara, Kalimantan Selatan
The coal mining activities conducted by PT Pamapersada Nusantara in the Pit Tutupan, South Kalimantan, employ an open pit mining system. This method creates exposed working surfaces that can accumulate rainwater runoff. This study aims to design a drainage system to manage water control in the western high wall area of RL 16, considering the impact of mining progression. The planning involves calculations for scheduled rainfall, rainfall intensity, estimated water discharge, open channel dimensions, culvert, and the number of pumps required to manage water in the pit sump. Using the Log Pearson III distribution, planned rainfall is determined at 101.499 mm for a 2-year return period and 134.782 mm for a 5-year return period. The rain catchment area at the research site in Sump RL 16 HW Barat is 84.83 hectares. The proposed trapezoidal channel design accommodates varying water discharges: 4.47 m³/s, 5.04 m³/s, 8.75 m³/s, 7.87 m³/s, 7.20 m³/s, and 3.77 m³/s for tertiary, secondary, and primary channels. The sump is designed to store two days’ worth of rainfall, with a capacity of 186,516 m³. Excess water is pumped to an external drainage system and settling pond using a Direct Multistage Pump system. The primary pump planned is the Multiflo 420 EX, complemented by a Warman 8/6 AH booster pump. Both pumps utilize TYCO PE100 HDPE pipes, ensuring efficient water transfer to the drainage system and settling pond, optimizing mine water management. The research results can be a reference for planning mine drainage systems with similar characteristics.
Copyright (c) 2025 Eprilia Simamora, Mohammad Nurcholis, Aldin Ardian, Hepryandi Luwik Djanas Usup https://creativecommons.org/licenses/by-sa/4.0
Alternatif Perencanaan Oprit Jembatan Batanghari (STA 15+750) di Jalan Tol Ruas Jambi – Rengat
Batanghari Bridge is part of the Jambi-Rengat Toll Road, faces significant challenges due its clay as the topsoil and dominant stratigraphy of sand. These contdition lead to high settlement potential and stability issues under heavy loads, requiring innovative to enhance stability and control costs. This study aims to evaluate the effectiveness of a combination of mortar foam and ordinary soil on at the Batanghari Bridge (STA 15+750). Observations were made at 2 abutments. Embankment material variation include 100% ordinary soil, 100% mortar foam, and combinations of 25%, 50%, and 75%. Results reveal that land subsidence from embankment loads and mortar foam remains high, necessitating alternative treatments. The findings indicate that for Abutment 1 benefits from Prefabricated Vertical Drain (PVD) and geotextile reinforcement, combined with 75% ordinary soil and 25% mortar foam. This approach reduces load and enhances stability at a cost of Rp29,045,321,602. Conversely, Abutment 2, with a 3-meter soft soil depth, achieves optimal results using 100% ordinary fill soil with replacement and geotextile reinforcement, costing Rp22,403,576,498. It was found that the differences in effective methods at Abutment 1 and Abutment 2 were caused by variations in subgrade conditions and soft soil depth at both locations. The study highlights the importance of tailoring embankment material and soil improvement methods to specific subgrade conditions. By demonstrating the effectiveness of combining material variations with soil improvement techniques, the findings contribute significantly to geotechnical engineering, offering practical, cost-efficient strategies for similar infrastructure projects
Copyright (c) 2025 Fikri Irfanil Azami, Yudhi Lastiasih https://creativecommons.org/licenses/by-sa/4.0
Analisis Ketidakberaturan Horizontal Struktur Rangka Gedung Oval Dengan Pushover Analysis Pada Rumah Sakit UPT Vertikal Surabaya
Building A at the Surabaya UPT Vertical Hospital is an example of using limited land to meet space needs. However, the oval shaped geometry of the building causes the frame structure to be different from usual. This changes in geometry has an impact on the occurences lateral and mass irregularities in the building structure. This study aims to analyze the stability and performance of oval structures by considering the influence of earthquake loads. The capacity level of structure is evaluated using the Performance Based Design method. This method involves conducting a Pushover Analysis by applying a predefined lateral dynamic load to the structure and gradually increasing it until the structure reaches its maximum capacity, ultimately leading to the structural failure. The results of this research obtained a ductility value of 1.21 for the X axis and 1.46 for the Y axis, this value makes the structure classified as partially ductile and not fully ductile. The performance level of the structure on the longitudinal axis (X) is 0.002 and on the transverse axis (Y) is 0.0019, so the structure is classified as SP-1 Immediate Occupancy, which means that the damage caused is not dangerous even if an earthquake occurs. The results of this research can be used as a guide in planning and evaluating oval or other irregular building structures, especially for vital buildings in areas with high earthquake risk.
Copyright (c) 2025 Yudha Safriana Wahdi, Wahyu Kartini, Nia Dwi Puspitasari https://creativecommons.org/licenses/by-sa/4.0
Hubungan Antara Rasio Agregat dan Volumetrik dalam Menentukan Kualitas Perkerasan Jalan
Road pavement quality is a critical factor in supporting a country's mobility and economy. Around 40% of the road length in Indonesia suffers damage, including permanent deformation and early cracking. To overcome road damage, it is important to know the pavement quality parameters such as Voids in Mineral Aggregate (VMA), Voids in Mix (VIM), and Voids Filled with Bitumen (VFB), along with the factors that influence them, such as material characteristics. This study aims to determine the effect of the fine and coarse aggregate ratio on volumetric parameters in asphalt mixtures, including VIM, VMA, and VFB. The experimental method was carried out on four samples. Aggregate characteristic tests were carried out, including gradation tests. Volumetric tests were carried out on each sample with asphalt content of 4%, 4.5%, and 5%. The research results show that the smaller fine-to-coarse aggregate ratio would increase the VMA and VIM values and decrease the VFB value. Aggregate ratio significantly affects volumetric parameters, which shows the importance of selecting aggregate with the right size distribution and determining the right ratio to achieve optimal pavement performance. The results of this study can be used as a practical guide for optimizing asphalt mix design with better quality and durability.
Copyright (c) 2024 Abroor Kissraya Fatardhoo, Andri Dwi Cahyono, Evita Fitrianis Hidiyati, Ahmad Lufi Zakaria, Ahmad Figur Pratama, Muh Wahyu Dian Nugraha, Yanwar Febriansyah, Diva Iga Pratama https://creativecommons.org/licenses/by-sa/4.0
Faktor Utama Penyebab Keterlambatan Proyek Konstruksi Gedung di Bojonegoro
Economic development in Bojonegoro is growing rapidly due to massive building construction. However, delays in building construction projects in Bojonegoro are a significant issue because they have a negative impact on costs, efficiency, and local economic stability. Identifying building project delay factors, especially in Bojonegoro, is important because project delay factors may differ from other areas. This research aims to identify and analyze factors influencing building project delays in Bojonegoro. The factors observed include materials, labor, equipment, finance, environment, and design changes. The research uses a quantitative approach and a questionnaire survey method, which has undergone instrument testing on 35 respondents involved in building construction projects in Bojonegoro. The data was tested on classical assumptions and analyzed using hypothesis testing (F and T tests) to determine the effect of each variable on project delays and ranking based on the coefficient values. The research results show that all variables studied significantly influence project delays, with labor as the most dominant factor, followed by environment and finance. Changes in design, equipment, and materials also contribute, although with a smaller impact. This research provides a strong empirical basis for project managers and related parties to develop more effective strategies for managing construction projects, reducing delays, and increasing project efficiency in Bojonegoro.
Copyright (c) 2024 Ahmad Waldan Ali Wafa, Nova Nevila Rodhi, Ayu Kurnia Ratna Sari https://creativecommons.org/licenses/by-sa/4.0
Faktor Utama Keterlambatan Pembayaran Dalam Proyek Perumahan Subsidi dan Komersial
In the implementation of housing development, the problem of late payment delays is a common issue encountered in commercial and subsidized housing projects during construction. These delays impact the timely completion and lead to disputes among the involved parties, which include owners, contractors, and subcontractors. This study aims to analyze the primary factors contributing to late payment in construction projects, specifically in commercial and subsidized housing. The analysis is conducted from the perspective of the owner, contractors, and subcontractors. The study involves six owner respondents, six contractor respondents, and four subcontractor respondents. The survey results were analyzed using the Analytical Hierarchy Process (AHP) to assess the significance of various factors influencing payment delays in both housing schemes. The analysis results indicate that financial issues with the owner's company are crucial factors from the owner's perspective in causing payment delays in both commercial and subsidized housing projects. A major challenge faced by contractors is the lack of capital availability, which can lead to delays that affect all involved parties. Meanwhile, discrepancies between job specifications not following the contract from the subcontractor's viewpoint highlight the importance of clear communication and rigorousness. All parties involved in housing projects need to improve financial management, enhance capital procurement, and tighten the supervision of contract implementation. By identifying key factors, adopting best practices can help mitigate the risk of payment delays and improve efficiency in future housing project implementations, whether commercial or subsidized.
Copyright (c) 2024 Bunga Olivia Verel, Roi Milyardi, Cindrawaty Lesmana https://creativecommons.org/licenses/by-sa/4.0
Evaluasi Pengelolaan Sampah Menggunakan Climate Resilient and Inclusive Cities (CRIC) Waste Assessment Tool Kota Palembang
Waste is a problem that cannot be ignored because it is always generated in all aspects of life. The Climate Resilient and Inclusive Cities CRIC Waste Assessment Tool helps in analyzing the current situation in the city and provides important and practical recommendations from both technical aspects, governance, and social issues. The research aims to evaluate urban waste management using the Climate Resilient and Inclusive Cities (CRIC) Waste Assessment Tool based on management technology in Palembang City. A quantitative strategy was used in this research, along with a descriptive and verification research method. Secondary data is taken from the national waste management information system and other literature to fill in the CRIC Waste Assessment Tool application. Data analysis using CRIC Tool covers waste management, governance, economy and knowledge of citizens, GHG emissions. The results of measuring waste management performance with CRIC show that waste management in the city is still low, most of the waste is disposed of uncontrollably, resulting in SLCPs. Waste banks and TPS3R are still lacking. Achievement of waste management to reduce greenhouse gas emissions has only reached 50% of the recommended target. Proper waste handling is still lacking, such as reduced dumping, open burning, and better composting practices. This will support modifications in waste handling from the community, which can support waste management technology development.
Climate Resilient and Inclusive Cities (CRIC) Waste Assessment Tool
Copyright (c) 2024 M Audito Alfansyah, Heni Fitriani, Febrian Hadinata https://creativecommons.org/licenses/by-sa/4.0
Peningkatan Kinerja Simpang Ciceri, Kota Serang dengan Model Penerapan Ruang Henti Khusus
The Ciceri intersection is in a densely populated urban area characterized by heavy traffic, particularly motorbikes. This is due to the nearby educational institutions, shops, offices, and a shopping center. The intersection faces numerous traffic conflicts, including crowded vehicle queues, irregular queuing by motorbikes, and improper lane usage by two- and four-wheeled vehicles. The phase setting of traffic signaling devices (APILL) at the Ciceri intersection has been implemented but has not solved the problem. This research aims to analyze the use of RHK to improve the performance of the Ciceri intersection using the Vissim model. The method is to test or simulate various RHK models at the research location. The results obtained can be applied to the RHK at two intersection legs, namely east and west, with a box-type RHK measuring 8m long and 2 x 3.5m wide, increasing the level of Service (LOS) from E to F. The results show a reduction in queues of 5.64 m and delays of 1.52 seconds on the north leg, as well as a reduction in queues of 7.85 m and a delay of 13.48 seconds on the south leg. These results show that RHK can effectively improve the performance of intersections with high traffic volumes without the need to increase physical road capacity.
Copyright (c) 2024 Shelia Ayu Rida Hanida, Suprapto Hadi, Rizal Aprianto https://creativecommons.org/licenses/by-sa/4.0
Analisis Perubahan Desain Gedung Pada Tahap Konstruksi Terhadap Perhitungan Volume dan Bill of Quantity (BoQ)
Construction design changes are a challenge that requires quick adjustments in project documents, especially in the Bill of Quantity (BoQ). These adjustments reflect major changes in costs and material requirements. The use of digital technology is key to facilitating this process, enabling faster and more accurate revisions. This research aims to compare volume calculations using Revit and manual volume calculations resulting from design changes in the YOGYA Kota Baru Parahyangan Development Project. In the process, the volume of material required for various construction elements is calculated manually and with the help of digital technology. The results of these two methods were then compared to determine significant differences and evaluate each method's efficiency and accuracy. This results show that the volume difference in profile steel profiles is +47.78%; concrete +21.83%; piles +12.06%; and reinforcement +2.00%. These findings show that Revit provides more accurate and detailed results than manual calculations, which are often prone to human error. Using Revit can speed up the design adjustment process, reduce costs and project completion time. This research contributes by providing empirical evidence of the benefits of digital technology in construction and practical guidance for professionals in choosing the right calculation method.
Copyright (c) 2024 Dila Rivana, Shyva Farhani, Yongki Alexander Tanne https://creativecommons.org/licenses/by-sa/4.0
Permeabilitas Tanah Lanau Sebagai Temporary Landfill Cover yang Distabilisasi dengan Bakteri dan Larutan Sementasi
In the development of waste management, piles of rubbish can produce liquid waste called leachate. Leachate from landfills can affect human health and pollute the environment and aquatic biota because leachate contains various chemical compounds and many pathogenic bacteria. To minimize the impact of landfill waste on the surrounding environment, the waste is covered with material that can isolate it from the surrounding environment. This research aims to determine the optimal level of cementation solution addition to waste sludge as temporary landfill cover using the MICP method. The research results reveal that the sample permeability meets the criteria for a temporary cover landfill, where the permeability specification limits are between 10-4 to 10-5 cm/s. The research revealed that 0.25M cementation solution and Bacillus Subtilis bacteria had the lowest permeability. Soil without cementation solution has a permeability coefficient value of 5.04×10-4 cm/s, and decreases to 6.67×10-5 cm/s with a cementation solution concentration of 0.25M over a 28-day peram period. Variations in the 0.25M cementation solution showed its ability to reduce soil permeability by up to 86.7%. Permeability has decreased, which means the soil pores are getting smaller. Thus, this addition can reduce soil permeability and minimize the possibility of environmental damage by leachate.
Copyright (c) 2023 Alfian Rahmadi, Andi Marini Indriani, Gunaedy Utomo https://creativecommons.org/licenses/by-sa/4.0
Evaluasi Ketahanan Gempa pada Fondasi Tangki Minyak 3000 bbl Berdasarkan Metode Analitik dan Elemen Hingga
Oil tank buildings are designed to be earthquake-resistant throughout their lifetime. The foundation of the 3000 bbl petroleum storage tank in Penukal Abab Lematang Ilir (PALI) Regency has been designed using previous seismic standards. This encourages the importance of evaluating foundation resilience against the latest standards because the latest standards show an increase in the Peak Ground Acceleration value. This research aims to determine the Safety Factor (FK) and settlement of the existing foundation of a 3000 bbl petroleum storage tank at the Collecting Station in PALI Regency using earthquake parameters in 2022. A quantitative approach was carried out using finite element and analytical analysis. Steel tank structure design, soil investigation, loads, earthquake parameters, and existing foundation design are used. FK and settlement results will be evaluated based on API 650 and SNI 8604:2017 requirements. The analytical and finite element research results show that the FK value meets the requirements. However, the FK value obtained tends to be too large compared to the requirements. Therefore, it is recommended to design a foundation size smaller than the existing foundation as an efficiency measure. Apart from that, the settlement results at the end of the service life (50th year) show that it is still within the settlement limit permitted by API 650. The research results have confirmed that the existing foundation can withstand earthquakes based on earthquake parameters in 2022. So, these results can be used to develop tank foundation designs for earthquake-safe oil storage in similar locations.
Copyright (c) 2023 Rosi Nursani, Fitriana Sarifah, Hidayanto https://creativecommons.org/licenses/by-sa/4.0
Efektivitas Dinding Sandwich Panel dan Precast ACC Panel Terhadap Biaya dan Waktu
Project delays in construction development have a major impact, especially on costs. Projects that experience delays in implementation will require large costs. One of the delay factors is caused by material selection, especially for wall materials. Precast AAC Panel wall and sandwich panel walls are current wall material innovations, but both differ in material composition, implementation method, and price. This research aims to analyze the effectiveness of the two types of walls in terms of cost and time. The research will use objects from the 24-story Sudimaran Forestwalk apartment development in South Tangerang. The research method uses quantitative methods by making a cost budget plan obtained from data on work volume, productivity, and unit price of work. Next, analyze the duration of work from productivity data and work volume. The analysis results for the budget for work costs using precast AAC panel materials cost IDR 11,640,163,103, while sandwich panel walls are IDR 16,223,117,608. For comparison of implementation time, precast AAC panel walls are faster, with a work duration of 623 days, and sandwich panel walls 784 days. From these price results, AAC panel walls are 23% cheaper than sandwich panel walls. Due to the low strength, the sandwich panel walls are sometimes damaged during construction, resulting in longer construction times. The analysis results show that precast AAC panel walls are more recommended as the choice of wall type in terms of cost and implementation time.
Copyright (c) 2023 kholis hapsari, Ardia Tiara Rahmi, Delista Putri Deni https://creativecommons.org/licenses/by-sa/4.0
Efektivitas Metode Pekerjaan Pelat Lantai Bondek, Half Precast dan Konvensional Gedung Asrama Putra Al-Azhar
The floor plate is one of the important components in a multi-story building. Conventional methods are still widely used for building floor slabs. This method requires a lot of labor and time, which can reduce productivity. Other methods, such as bondek and half precast in floor slab work, are expected to increase work effectiveness and efficiency. This study aims to determine which method is most effective in floor slab work by reviewing cost, time, and work productivity. Floor plate planning consists of calculating each method's structural strength and volume of work, including formwork, reinforcement, concrete, and formwork dismantling. Cost analysis is carried out by collecting data on material prices and labor wages for the building's Draft Budget (RAB). Estimated work time involves formwork preparation, installation of reinforcement, and concrete casting for the three work methods. Based on the results of the calculation analysis on the floor slab work of the Al-Azhar Boys Dormitory Building with an area of the floor plate of 375,318 m2. Conventional floor slab work is more economical than bondek slab work by around 31.23%, but requires the longest work time. Meanwhile bondek floor slabs offer the fastest processing time, even though the cost is higher than conventional slabs, around 31.19% and 5.18% lower than half precast slabs. This can be a recommendation in choosing a floor slab work method.
Copyright (c) 2023 Muhammad Romadhoni, Muh. Nur Sahid https://creativecommons.org/licenses/by-sa/4.0
Kuat Lentur Beton Menggunakan Agregat Batu Petangis dan Pasir Semboja dengan Penambahan Botol Plastik
Utilizing local materials is a strategic step in optimizing concrete production in East Kalimantan. There's an example supply of petangis stone and semboja sand aggregates. Apart from that, using various wastes, including plastic waste, in concrete production is also a current issue. This study aims to investigate the potential substitution of fine aggregates with PET and combine them with local materials, to understand their impact on the bending strength of concrete. The study tested concrete bending strength using 15x15x60 cm blocks with PET plastic substitutions at 0.30%, 0.45%, and 0.60% of sand weight, comparing them with PET-free concrete. The research results show that adding 0.30 and 0.45% PET plastic bottles causes a decrease in the flexural strength of concrete. This is related to the influence of changes in the composition of the concrete mix, including factors such as uneven aggregate distribution and less-than-optimal material binding. Flexural strength increases at a percentage of 0.60% by 3.7% or 3.3 MPa and shows better results than normal concrete. So the PET percentage can be used as a recommendation in making concrete using local materials such as petangis stone aggregate and semboja sand.
Copyright (c) 2023 Topik Wahyu Widianto, Andi Marini Indriani, Gunaedy Utomo https://creativecommons.org/licenses/by-sa/4.0
Optimasi Geometri Lereng dengan Evaluasi Nilai Faktor Keamanan Menggunakan Software Geostudio
The slopes of the Widas watershed in Kutorejo Village, Bagor District, Nganjuk Regency were hit by a landslide, damaging a 50-meter-long road. This damage has an impact on the activities and mobility of residents. The impact of landslides caused enormous losses, both infrastructure damage and loss of life. Several studies have been carried out, in determining slope stability it is necessary to observe at the research location and determine the type of soil, soil consistency, and soil shear strength parameters. This research aims to determine the value of the safety factor (FK) on the slopes of the Widas River. This research began by conducting a case study, including interviews, collecting field survey data, taking soil samples, and laboratory testing. Slope stability analysis was carried out using Geostudio software. The research results show that the soil type is classified as Poorly Graded Sand (SP), and the soil consistency is classified as Non-Plastic soil with a liquid limit of 26.093 and a shear angle of 20° - 30°. Slope improvements were carried out by changing the slope geometry until a slope ratio of 1V:2H was obtained by creating two slope core models. The FK value increased from 1.007 to 1.107 and 1.437 to 1.585 under pore water pressure conditions. Thus, the slope modeling obtained can be used to overcome landslide problems.
Copyright (c) 2023 Gilang Wahyu Kottama, Agata Iwan Candra, Arif Rivianto, Muhammad Rifqi Fatkhur Rohman, M Rizal Agus Joko Budiawan, M Sousa Taufani, M Wildan Prasetyo https://creativecommons.org/licenses/by-sa/4.0
Meningkatkan Stabilitas Lereng Berdasarkan Pengujian Karakteristik Tanah
Kediri Regency has diverse potential and wealth, including natural resources, culture, and tourism. One example is the Dolo waterfall located in Jugo Village. In January 2023 there was an avalanche caused by heavy rainfall in the mountainous area of Jugo Village, Mojo District, Kediri. The landslide disrupted road access to tourist attractions, infrastructure and also affected the economy. Several studies have revealed that soil type, shear strength, and soil consistency properties are important in influencing a slope’s stability level. However, the discussion of landslide prevention efforts regarding soil and slope characteristics is still limited. This study aims to determine soil type, consistency properties, shear angle, soil cohesion, and slope safety factors in Jugo Village, Mojo District, Kediri Regency. Research begins with a survey and sampling, then testing is carried out in the laboratory and calculated the slope safety factor (Fs). The results revealed that the characteristics of the soil in Jugo Village influenced the landslides that occurred. Both the type of soil, the consistency limit, and the shear strength of the soil indicate that the slope is unstable, this is also indicated by the calculation value of Fs <1. The results of this study can be used as a reference in planning and carrying out slope stability at that location so as to prevent landslides in the future. The effort that can be done is to change the slope to 35° so that the slope becomes stable.
Copyright (c) 2023 Mahendra Septa Kuswiantoro, Agata Iwan Candra, Rifqi Sahrul Nurhuda, Abdi Aziz Nurrahman, Ilham Fanani, Muhammad Najmuddin Alkamal https://creativecommons.org/licenses/by-sa/4.0
Akurasi Perhitungan 3D Volume Galian Proyek Pembangunan Jalan Tepus-Jerukwudel II Menggunakan GIS
Calculation of excavation volume is one of the important activities in earthworks. Volume calculations are still done manually for some projects using Microsoft Office Excel. These calculations are time-consuming and prone to errors. The use of DTM-based 3D models in calculating excavation volume is an important thing that needs to be done for work efficiency. This study aims to determine the accuracy of the 3D-based Digital Terrain Method (DTM) in calculating excavation volume. The data used comes from a topographic survey of 64 points. Volume calculations were performed using the 2D Average End Area and 3D DTM-based methods (TIN and Kriging) using ArcGIS. The calculation results will be compared with the actual data from the project excavation volume report. The results show that the 3D volume calculation has fairly good accuracy compared to the traditional average end area method, with a difference of 1.01%. TIN can represent the results of the calculation of the excavation volume, which is quite good, with a difference of 1.33% to the actual volume and RMSE 107.49 m3. This is because the land surface under review is a mountainous area, where the formed surface tends to be uneven, and elevation changes sharply. This is in accordance with the characteristics of the DTM formed by TIN. So the selection of the most appropriate surface modeling method in mountainous areas is TIN. Using the TIN method can minimize the difference in volume calculations and increase the accuracy of soil volume calculations.
Copyright (c) 2023 Dafa Prabaswara Wahyudi, Agus Riyanto https://creativecommons.org/licenses/by-sa/4.0
Mengatasi Genangan Jalan Donowati Kota Surabaya Melalui Perbaikan Drainase
Surabaya plays a crucial role as the economic center in eastern Indonesia. However, it is identified as a waterlogging-prone area. Several regions have experienced flooding with water heights ranging from 10 to 70 cm, lasting up to 6 hours. This issue also happened in the Donowati area, Surabaya where mismatches in the construction of urban drainage channels with design criteria were found, resulting in inundation. These inundations cause infrastructure damage, health risks, disruption of activities, and economic losses. This research aims to evaluate and optimize the drainage system in Jalan Donowati, Surabaya. The research was conducted by collecting existing canal dimension data and hydrological data. Furthermore, data analysis was carried out, including hydrological and hydraulics analysis. Repairs will be carried out if an overflow occurs so the channel can run normally. The results showed drainage channels on Jalan Donowati could not accommodate rainwater due to their small capacity, namely one secondary and three tertiary channels. The channel redesign obtained dimensions of 1 m x 1 m for the secondary channel and 0.7 m x 0.6 m for the tertiary channel. The validation results show that the new dimension is safe against high rainfall. In addition to channel re-dimensions, inlet additions were also made to allow rainwater to enter the drainage canals more efficiently. So that with this new dimension, it can prevent inundation that occurs during the rainy season.
Copyright (c) 2023 Jenny Caroline, Arintha Indah Dwi Syafiarti https://creativecommons.org/licenses/by-sa/4.0
Optimasi Ukuran Penampang pada Struktur Rangka Batang Ruang dengan Binary Dragonfly Algorithm
The cross-section area of a structural element plays a vital role in designing and planning processes. Each structural element must meet design criteria while maintaining an effective cross-sectional area, ensuring the structure is economical and lightweight. This Economic aspect refers to the structure's cost and weight, minimizing any lateral effects that may arise. This research aimed to determine the optimum cross-sectional for bamboo elements, with the objective of minimizing the weight of the space truss structure but still meets the design criteria. Four different cross-sectional areas of bamboo were used, 4272,566 mm2, 3382,71 mm2, 3084,259 mm2, and 2827,433 mm2. The optimization algorithm used is the binary dragonfly algorithm. There are two configurations of space truss structures considered, the first space truss structure is 25 members, and the second space truss is 32 members (pyramid module). The program was run four times to ensure the convergence and consistency of the results obtained. The results show that the weight of the first space truss structure is 86.98 kg while the weight of the second space truss structure is 64.6015 kg. The results can be considered optimal as the critical element's actual stress is close to the allowable stress. Therefore, the binary dragonfly algorithm can be an alternative method to optimize the cross-sectional area of structural element especially for space truss structure.
Copyright (c) 2023 Richard Frans, Stevy Thioritz https://creativecommons.org/licenses/by-sa/4.0
Pelindung Dinding Terhadap Hujan Asam Menggunakan Geopolimer Berbasis Nanosilika dan Cellulose Nanocrystals
Geopolymers have a weakness in durability against exposure to acid rain. Nano-silica and Cellulose Nanocrystals (CNCs) can be incorporated to enhance the acid rain resistance of geopolymers. This study aims to investigate the durability of geopolymer-based nano-silica and CNCs against exposure to acid rain. This study employed a rain simulation infiltration method. The concentrations of nano-silica and CNCs used were 4% and 1%, respectively. The compressive strength of the geopolymer specimens was tested before and after exposure to assess the effects of acid rain. Additionally, SEM and XRD tests were conducted to analyze microstructural changes. The results revealed a significant reduction in the compressive strength of the geopolymer without nano silica and CNCs (36.14% and 26.73% at pH 4 and 5, respectively). In contrast, the geopolymer paste containing nano-silica and CNCs exhibited lower reductions of 22.93% and 19.77% at pH 4 and 5, respectively. These findings indicate that the addition of nano-silica and CNCs contributes to the preservation of compressive strength. The observed effect is attributed to the ability of nano-silica and CNCs to impede acid attack on the geopolymer paste, thereby preventing the degradation of calcium levels present in the fly ash within the geopolymer. The strength degradation of the geopolymer paste resulted from the breakdown of Al–O, Si–O, and calcium bonds within the system, triggered by the reaction with H2SO4 from the acid rain. Nano-silica and CNCs-based geopolymers exhibit positive effects and can be utilized as a coating on the walls of buildings.
Copyright (c) 2023 Cut Rahmawati https://creativecommons.org/licenses/by-sa/4.0
Limbah Cangkang Telur Sebagai Inovasi Material Pengganti Agregat Halus Beton
Eggshells become a huge waste and cause various environmental problems. One of the efforts that can be made to reduce this waste is to use it as a material in concrete. Cement and fine aggregate raw materials that are continuously used will eventually run out and are difficult to renew. This study aims to determine the slump value and compressive strength using eggshell waste as a substitute for cement and fine aggregate in concrete. Eggshells as a substitute for cement were in the oven at 105°C for 24 hours and then fired and the material that passed the No. sieve was taken. 200 (75 µm) and sieve number 4 for fine aggregate. The percentage of mixed eggshell content used was 0%, 5%, 10%, and 15%. The results showed that the slump and compressive strength decreased with increasing eggshell content in the concrete. This is caused by the size of the eggshell. The use of egg shells with a size of 4.75 mm as a substitute for fine aggregate is not recommended for concrete. The irregular shape of the eggshell is considered less capable of filling cavities and even causing cavities in concrete. The right size for using egg shells is in the range of 0.5 – 1 mm. Referring to these results, this study highlights the importance of choosing eggshell size as a substitute for fine aggregate. So that with proper utilization, egg shells can be utilized as a material substitute and improve the quality of concrete.
Copyright (c) 2023 Bunyamin, Heru Pramanda, Nesri Hendrifa, Afdhal https://creativecommons.org/licenses/by-sa/4.0