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IOP Conference Series: Materials Science and engineering 2020年第1期1007卷

作者： Vicky Muroby Chaidir Anwar Makarim Civil Engineering Post-graduate Program Faculty of Engineering Universitas Tarumanagara

Construction on peat soil has its own difficulty and challenge due to its properties of low shear strength, high compressibility, high water content, and flammable material. Indonesia ranked 4th on peat land area around the world after Canada, Russia, and United States. Based on recent mapping, peat land covers 14,9 million hectare in Indonesia. This paper presents the finding from literature studies regarding peat soil, construction on peat soil, case studies for road infrastructure construction on peat soil at West Borneo, Indonesia, and provide analysis and recommendation for the problems faced. Construction on peat soil requires special attention, especially on the design and execution. In the event where construction must be performed on a peatland which thickness is < 3m, the approach recommended is peat removal and replacement. If the peat thickness is 3-10 m, adopt the preloading, construction with vertical and sand drain, lightweight fills, surface mattress, stone column, etc. If the peat thickness is < 10m, use pile as foundation. Unit price contract is preferable over lumpsum contract due to the high uncertainties of peat soil. Environment impact due to construction on peat soil need to be accounted for, also the risk of peat fires need to be considered if dewatering used.

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Linking agro-industrial engineering body of knowledge with industry 4.0: A case study of agro-industrial engineering study program at IPB University

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IOP Conference Series: Earth and Environmental Science 2020年第1期443卷

作者： T Djatna Graduate and Post Graduate Program of Agro-industrial Engineering Study Program- IPB University Bogor Indonesia 16680

The emergence of Industry 4.0 paradigms has been forcing and changing the landscape aspect of engineering education, as seen in agro-industrial engineering body of knowledge (AIEBoK). These paradigms push to adapt and to prepare a new approach for curriculum content and delivery. It is urgent to re-think and redefine how to prepare a newer perspective into the three combined disciplines that form AIE-BoK, namely Industrial and system engineering, process/bioprocess engineering, and industrial environmental engineering. They should clearly intertwine their relevance in parallel with pillars of the industry 4.0. These stakeholder's requirements are the main motivation of this work. Within Industry 4.0 vision, AIE-BoK is investigated on how disruptive technologies play a role in changes. Some issues related to how to utilize common connectivity in technology advancement and to push a relevant curriculum both content and structure are discussed. In order to construct a new map and landscape of curriculum relevancy, it continues with the discussion of how and where agro-industrial engineering education attempts to interpret new roles in industrial revolution 4.0. Along with the consideration of how this interpretation potentially changes agro-industrial products, services, and manufacturing. In closing, a discussion of how agro-industrial engineering curriculum should respond is briefly discussed.

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Numerical analysis of the influence of the contact boundary condition and specimen geometry on concrete compressive strength

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Procedia Structural Integrity 2023年 47卷 261-267页

作者： Caroline Bremm Luísa Inda Leandro Ferreira Friedrich Sabrina Vantadori Ignacio Iturrioz Luis Kosteski Engineering Post Graduation Program Federal University of Pampa Av. Tiaraju 810 Alegrete 97546-550 Brazil Civil Engineering Graduate Program Federal University of Pampa Av. Tiaraju 810 Alegrete 97546-550 Brazil Program of Mechanical Pos-Graduation Federal University of Rio Grande do Sul Sarmento Leite 425 Porto Alegre 90040-060 Brazil Department of Engineering & Architecture University of Parma Parco Area delle Scienze 181/A 43124 Parma Italy

In the present paper, the influence of the contact boundary condition and specimen geometry on the concrete compressive strength is numerically investigated by using a version of the Lattice Discrete Element Method (LDEM), implemented on Abaqus/Explicit. More precisely, two types of contact boundary conditions are considered and, for each of them, three different slenderness levels (height/width ratio - h/b) are analyzed (that is, h/b = 0.5, 1.0, and 2.0) by considering a square cross-section. Moreover, for h/b = 2.0, a circular cross-section is also examined. Two models are developed: one by using the LDEM and the other by using a hybrid model, combining Finite Elements and LDEs. The results show that both the boundary conditions and the sample geometry influence the axial compressive strength.

关键词： Abaqus concrete compressive strength Lattice Discrete Element Method (LDEM)

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Flood Susceptibility Mapping using GIS Based on Fuzzy AHP Method in Keureuto River Basin, Aceh

Flood Susceptibility Mapping using GIS Based on Fuzzy AHP Me...

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Science and Information Technology in Smart Administration (ICSINTESA), International Conference of

作者： Maimun Rizalihadi Alfiansyah Yulianur Yuwaldi Away Ella Meilianda Doctoral Program. Post Graduate. Program. Syiah Kuala University Banda Aceh Indonesia Civil Engineering Department Syiah Kuala University Banda Aceh Indonesia Elect. and Compt. Eng. Department Syiah Kuala University Banda Aceh Indonesia

ISBN: (数字)9798350376111

ISBN: (纸本)9798350376128

Flood susceptibility mapping become crucial for describing flood risk zones and development mitigation actions. By means of a multi-criteria decision analysis-Analytical Hierarchy Process (MCDA-AHP), this study examined flood-inundation of Keureuto watershed in North Aceh. The study employed a mixture of AHP and GIS (Geographic Information System) on a fuzzy environment, and tested with the field observation by mean of AUC-ROC method to see its accuracy. Eleven key criteria that can trigger floods were chosen: rainfall, flow accumulation, river density, distance to the river, elevation, slope, TWI, LULC, soil type, NDVI, and curvature. The significance of all of criteria was arranged based on the weights which is determined using Fuzzy-AHP (FAHP) pairwise comparison matrix (PCM). The highest flood-triggering criteria were rainfall (0.199), TWI (0.159), flow accumulation (0.143), distance to rivers (0.094), and slope (0.091). Based on fuzzy overlay, the area of $323.747 \mathrm{~km}^{2}\left(34.635 \%\right.$ of $934.745 \mathbf{k m}^{2}$ of total area) was high to very high flood susceptibility which is mostly concentrated in downstream of river basin, while the area of $610.998 \mathrm{~km}^{2}(65.365 \%$ of the total area) has moderate to very low flood susceptibility. where the model achieved a higher AUC value of $\mathbf{7 7. 8 9 \%}$, indicating better performance. It is proved that the FAHP model is very good for forecasting flood-inundation areas in the Keureuto River basin.

关键词： Phase change materials Rain Accuracy Prevention and mitigation Watersheds Soil Predictive models Rivers Floods Geographic information systems

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Retracted: Implementation Method CUSUM to Determine the Accident Prone Areas in Web Based

Retracted: Implementation Method CUSUM to Determine the Acci...

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2018 Workshop on Multidisciplinary and Its Applications: Applied Mathematics, Computer Science, Information Systems, and Information Technology, WMA-Mathcomtech 2018

作者： Dinata, Rozzi Kesuma Abdullah, Dahlan Hartono, H. Erliana, Cut Ita Riasti, Berliana Kusuma Iskandar, Akbar Sari, Ifit Novita Nurmawati, N. Nanuru, Ricardo Freedom Putri, Lusi Dwi Manurung, Rosida Tiurma Sriadhi, S. Saleh, A.A. Astari, T. Khaddafi, Muammar Department of Informatics Universitas Malikussaleh Aceh Indonesia Department of Computer Science STMIK IBBI Medan Indonesia Department of Industrial Engineering Universitas Malikussaleh Aceh Indonesia Department of Informatics Universitas Sebelas Maret Surakarta Indonesia Department of Informatics STMIK AKBA Makassar Indonesia Departement Of: Social Science Education Program Post Graduate Program Universitas Kanjuruhan Malang Malang Indonesia Faculty of Industry Technique University of 45 Surabaya Indonesia Universitas Kristen Indonesia Maluku Ambon Indonesia Department of Civil Engineering Universitas Lancang Kuning Pekanbaru Indonesia Graduate Program in Scientific Psychology Universitas Kristen Maranatha Indonesia Department of Electrical Engineering Universitas Negeri Medan Indonesia Statistics Financial and Social Sciences Research Group Indonesia Department of Elementary School Teacher Education STKIP Citra Bangsa Aceh Utara Indonesia Department of Accounting Universitas Malikussaleh Aceh Indonesia

At the Unit Laka Lantas Polres Lhokseumawe determining accident-prone areas on roads in Lhokseumawe still using manual systems. Determination of accident-prone areas are less effective because the police Unit Laka Lantas Polres Lhokseumawe just using the data of the last year and had to repeatedly calculate manually accident-prone areas based on the number of human casualties. In this study the system implementation CUSUM method (Cummulative Summary) to determine the accident-prone areas designed using the web-based programming language PHP. In this system there are three processes to determine areas prone to accidents, the accident rate calculations based on the weighted severity, blacksite calculations using the Z-Score method for determining areas prone to accident blackspots and calculations using the CUSUM method to determine the critical points of an accident. The data used are secondary data obtained from the Police Unit Laka Lantas Polres Lhokseumawe years 2009-2013. © Published under licence by IOP Publishing Ltd.

关键词： Accidents

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Seawater Intrusion Modeling on Groundwater Confined Aquifer in Semarang

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Procedia Environmental Sciences 2015年 23卷 110-115页

作者： Edy Suhartono P. Purwanto S. Suripin Doctorate Program Of Environmental Studies Post Graduate Program Diponegoro University Jl. Imam Barjo SH No. 5 Semarang-Indonesia-50000 Polytechnic State Of Semarang Jl. Prof.Sudarto SH Semarang - Indonesia- 50000 Department Of Chemical Engineering Faculty Of Engineering Diponegoro University Jl. Prof.Sudarto SH Semarang – Indonesia- 50000 Department Of Civil Engineering Faculty Of Engineering Diponegoro University Jl. Prof.Sudarto SH Semarang – Indonesia- 50000

The focus of this study is to identify and describe of a seawater intrusion in confined aquifer modelling in Semarang with a descriptive quantitative analytical method. The results showed potentially experiencing seawater intrusion which increased of 0.575 km2/years. Seawater intrusion models divide to 3 models are the western route have a maximum error is 27.9%, then the middle route have the maximum error is 41.1% and the eastern route have the maximum error is 40%. In 2035, the seawater intrusion on western route is predicted about 3.0 km from the coastline, 4 km for middle route, and about 3.25 km for eastern route. This is one of the information that from right now, the management of a groundwater in the confined aquifer in Semarang is necessary to supervise and better and more optimal controlling

关键词： Coastal Areas Groundwater Chloride Seawater Intrusions

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The effect of using crumb rubber on fatigue and rutting lives in flexible pavement

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IOP Conference Series: Materials Science and engineering 2020年第1期732卷

作者： T A Balqis S Suherman Post-Graduate Student of Infrastructure Engineering Study Program Applied Master Program Politeknik Negeri Bandung Bandung Indonesia Civil Engineering Department Politeknik Negeri Bandung Bandung Indonesia

This research is performed to analyze effect of using crumb rubber (CR) on the overlay design of Palembang City – Betung roads. Analysis of existing road conditions using the AASHTO 1993. This analysis based on deflection data using the Falling Weight Deflectometer (FWD). While, the overlay design analysis using CIRCLY 7.0 software to determine horizontal tensile strain (εh) for fatigue live and vertical compressive strain (εv) for rutting live parameters. The result showed that using CR can increase fatigue live into 66 % and rutting lives into 22 % for contribute pavement performance. To ensure the effect of CR in pavement's performance, further research must be taken to find out if there are other effects that support.

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Comparative study of asphalt concrete characteristic between ideal gradation and laboratory tested gradation with crumb rubber

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IOP Conference Series: Materials Science and engineering 2019年第1期650卷

作者： Asep Sundara Risna Rismiana Sari Tanya Audia Balqis Civil Engineering Department Politeknik Negeri Bandung Bandung Indonesia Post-Graduate Student of Infrastructure Engineering Study Program Applied Master Program Politeknik Negeri Bandung Bandung Indonesia

Modifying asphalt concrete with using Crumb Rubber (CR) can provide environmental benefits. The method used in this study is an experimental laboratory with Mashall machine. The tests used two types of gradation, namely the gradations of Ideal and Laboratory Test. CR used in a mixture with a dry process method to replacement 0%, 5%, 15% and 20% of the weight aggregate at fraction No. 30 (0.6 mm). The results showed that the Ideal gradation mixture has a better characteristic than the mixture of laboratory tested gradations. Ideal gradations can increased stability into 10% from Laboratory Test gradations for mixture without CR. Addition of CR contect in AC mixture did not significantly effect for the characteristics. To ensure the effect of CR in mixture, further test must be taken.

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A System Dynamics Model of Sustainable Construction for High rise Residential Projects in Developing Countries: Case of Indonesia

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Open civil engineering Journal 2022年第1期16卷

作者： Sutantio, Aditya Anwar, Nadjadji Wiguna, I Putu Artama Suryani, Erma Post Graduate Program Civil Engineering Department Institut Teknologi Sepuluh Nopember Jalan Raya ITS Surabaya 60111 Indonesia Civil Engineering Department Institut Teknologi Sepuluh Nopember Jalan Raya ITS Surabaya 60111 Indonesia Information System Department Institut Teknologi Sepuluh Nopember Jalan Raya ITS Surabaya 60111 Indonesia

Introduction: Despite its contribution to urban development, high rise residential projects also cause adverse impact on the living environment. To address the problem, a sustainable construction as a new paradigm has been introduced. Various papers have examined the importance of sustainable construction. However, most studies focused on social and environmental aspects and with few consideration on the economic objective of the business. This study aimed to fill the research gap by presenting a dynamic model to improve social, environmental and economic performance of sustainable construction for high rise residential projects in developing countries. Methods: This study started with a literature review as a basis for a qualitative survey conducted in thirty high rise residential projects in Indonesia, to identify the influencing factors and the interrelationships. To analysis the data, a system dynamics approach was utilized. Results: The simulations reveal that the current regulation and construction practices are insufficient to reduce environmental negative impacts. In order to formulate better policies, three scenarios comprised the implementation of building energy regulation, tax incentives policy, and a policy mix were employed. The results show that the scenarios could improve construction sustainability performance in some extends. Conclusion: The combination of building regulation and tax incentives policy is effective to achieve environmental and social as well as economic aspects of sustainable construction which is suitable for investors. Based on the results, it is concluded that the model can be used to formulate various policies in the future to enhance sustainable construction of high rise residential projects in developing countries. © 2022 Sutantio et al.

关键词： Environmental impacts Lean construction Life cycle cost Regulation Sustainable construction System dynamics

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The Effect of EPS Addition to Soil Stabilized with Fly Ash as Lightweight Fill Materials for Embankment Construction

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Journal of Physics: Conference Series 2019年第1期1364卷

作者： Syahril Andri Krisnandi Somantri Aditia Febriansya Civil Engineering Department Politeknik Negeri Bandung Bandung Indonesia Civil Engineering Department Politeknik Negeri Bandun Bandung Indonesia Post-Graduate Student of Infrastructure Engineering Study Program Applied Master Program Politeknik Negeri Bandung Bandung Indonesia

Design and construction of road embankment presents several challenges, including the possibility of bearing capacity failure, large total settlement, differential settlement, and slope instability, which may result from the weight of the embankment construction itself, and/or weak foundation. A number of techniques have been developed and can be used to overcome these problems, one of them is by modifying the weight of the embankment itself with the use of lightweight materials, such as soil-EPS mixture. The use of soil-EPS mixture as lightweight material provides several advantages, among which can achieve the same volume or elevation requirement with a significantly lighter weight compared to ordinary materials, improving slope stability, embankment over high compressibility soil, and to reduce soil pressure to soil retaining structures, abutment or bridge pillar. Fly ash also added to act as binder to increase shear strength of mixture. The result of the compaction test shows that the addition of a small amount of EPS to the mixture can significantly reduce the maximum dry density of the mixture. Triaxial UU and UCS test results show a reduction in mixture strength as EPS contents increase, but due to the presence of fly ash increases the strength of mixture as the number of day increases, so that the use of lightweight materials has the potential to be one of soil improvement solutions.

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