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S N Fitri[1],2*, N S Surjandari1, Y M Purwana1, B Setiawan1, G Chrismaningwang1, and H Dananjaya1
1UNS Geoscience Research Group, Civil Engineering Department, Universitas Sebelas Maret, Jebres, Surakarta 57126, Indonesia.
2Disaster Research centre, Universitas Sebelas Maret, Jebres, Surakarta 57126, Indonesia.
[1],2* Corresponding author: [email protected]
DOI: https://doi.org/10.20885/icsbe.vol4.art8
ABSTRACT
The development of Indonesia’s economic sectors and populations leads to huge regional problems, which provide the large community’s electricity needs in several areas. The common solution to this issue is to offer the potential natural resources that are safe for the environment and can be used as a source of electricity, such as a small-scale hydroelectric power plant or a Micro-Hydro Power Plant. This structure requires the dynamic foundations to accept dynamic loads caused by machine movements such as rotation, vertical movement, horizontal movement, and torque. The main objective of this work is to analyse the effect dimension of machine foundation and machine capacity in several conditions. This research was conducted on numerous machine capacity, namely machine 1, 2, and 3, which offers different frequency and weight. The foundation length was designed to range between 4 and 6m, which design a similar embedded foundation at 1m and width of 0.5m. The soil properties were conducted in secondary data with CPT results. The outcome provides that the addition of foundation area reduces the amplitude. The results show a similar trend in three categories; vertical, horizontal, and rocking aspects which generate values of approximately 57%, around 40%, and about 50%, respectively, in all machine types. The higher area and length of the foundation, the smaller amplitude will be.
Keywords: Machine; Block-type; Dynamic; Amplitude; Foundation
REFERENCES
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Yurika[1]*, Livia1, Makmur A1, and Rachmansyah1
1 Engineering and Science Computer Faculty- Civil Engineering Department, Krida Wacana Christian University, Tanjung Duren Raya no. 4 – West Jakarta, Indonesia
[1]* Corresponding author’s email: [email protected]
DOI: https://doi.org/10.20885/icsbe.vol4.art7
ABSTRACT
During the COVID-19 pandemic for more than two years, there was an acceleration in increasing LDPE household waste, especially from food packaging. The problem of plastic waste is an issue that requires more attention for reuse. Meanwhile, the urban infrastructure growth is followed by the reduction of water catchment areas, so that surface water runoff causes flooding. Responding to this, porous pavement is a solution for infrastructure development, that has a low impact on the environment. However, the fact is that porous asphalt pavement has low stability, so it is applied to low traffic loads such as pedestrian ways. To overcome this problem, a material that binds asphalt and aggregate is needed. This research aims to utilize LDPE waste to improve the performance of porous asphalt mixtures. The method used is experimental by using Marshall parameters. The results of the study with the addition of LDPE and Polyurethane obtained an increase in the value of stability by 17.35% but, decreased the value of flow by 15.18% and permeability index by 12.07%. The optimum value is adding 2% LDPE and 7.5% Polyurethane so that LDPE can be used as additional material to replace some asphalt materials in porous asphalt mixtures.
Keywords: LDPE, Polyurethane, Ashpalt Mixtures
References
[1] Gusty S, Tumpu M, Parung H, and Marzuki I 2021 Marshall Characteristics of Porous Asphalt Containing Low-Density Polyethylene (LDPE) Plastic Waste IOP Conf. Series: Earth Environmental Science 921 012025
[2] Candra P R, Siswanto H, and Rahardjo B 2021 Karakteristik Marshall Campuran Aspal Porus dengan Penambahan Polyurethane Media Teknik Sipil 19(1) 11-16
[3] Mayuni S, Prabandiyani, and Setiadji B H 2020 Penerapan Perkerasan Aspal Berpori di Indonesia Jurnal Teknik Sipil 20(2) 1-5
[4] NAPA 2003 Design Construction and Maintenance Guide for Porous Asphalt Pavement United States
[5] AAPA 2004 National Asphalt Specification S Edition Australia
[6] Rifqi M G, Nariswari W, Ariyanto E, and Gunawan T 2017 Nilai Stabilitas Porous Asphalt Menggunakan Material Lokal Jurnal Sipil Politeknik 19(1) 1-51
[7] Hidayati H N, Rifqi M G, and Amin M S 2021 Pengaruh Penambahan Plastik LDPE Pada Campuran Aspal Beton Lapis AC-BC Journal of Applied Civil Engineering and Infrastructure Technology 2(2) 1-6
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L Wei[1], D Syamsunur1,2*, S Surol1, M N H B Jusoh1, and N I M Yusoff3
1 Department of Civil Engineering, Faculty of Engineering, Technology and Built Environment, UCSI University, Kuala Lumpur, 56000, Malaysia.
2 Postgraduate Department, Universitas Bina Darma Palembang, Indonesia.
3 Department of Civil Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor, Malaysia.
1* Corresponding author’s email: [email protected]
DOI: https://doi.org/10.20885/icsbe.vol2.art6
ABSTRACT
The critical position of concrete plays a decisive role in engineering applications where extreme high-temperature environments severely affect the durability and life cycle of concrete structures. Experiments were conducted to mimic fire and extreme high-temperature environments, using different activities of nano calcium carbonate (NC) and nano silica (NS) to replace cement mixed concrete at 2.5%, 3.0% and 3.5% respectively, and a series of data analysis of nano concrete to derive patterns of performance change and drive new momentum for progress in the concrete industry. Experimental studies were conducted to explore the decaying changes in the mechanical properties of nano concrete after the concrete modified with composite nanomaterials was heated at different temperature environments of 25°C, 200°C, 400°C and 600°C. The results showed that the mechanical compressive strength of the nano concrete increased by 17.05%, 21.81% and 23.00% at 7 days respectively compared to the control concrete, and the nano 3.0% admixture showed excellent mechanical properties in the range of 25°C to 600°C. The results show that the strength checks of the nano-concrete cube and cuboid specimens after heating through different high-temperature environments were similar in rebound tests and no significant differences were found.
Keywords: Composite nanoparticles, nano-concrete, extreme high-temperature environments, high-temperature resistance, climate change
Reference
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[4] K. Kishore and N. Gupta, 2019.“Application of domestic & industrial waste materials in concrete: A review,” Mater. Today Proc., vol. 26, pp. 2926–2931, doi: 10.1016/j.matpr.2020.02.604.
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[6] P. Mugilvani, S. T. Murugan, B. Kaviya, and K. Sathishkumar, 2019. “Experimental investigation on nano concrete,” Int. J. Civ. Eng. Technol., vol. 10, no. 1, pp. 907–912
[7] M. Alvansazyazdi and J. A. Rosero, 2019. “Pathway of Concrete Improvement Via Nano-Technology,” Ingenio, vol. 2, no. 1, pp. 52–61, doi: 10.29166/ingenio.v2i1.1637.
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[17] A. A. Elsayd and I. N. Fathy, 2019. “Experimental Study of Fire Effects on Compressive Strength of Normal-Strength Concrete Supported With Nanomaterials Additives,” IOSR J. Mech. Civ. Eng., vol. 16, no. 1, pp. 28–37.
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H Prabowo[1], M P Dewi², D S E Dewi³, Hartatik4, M F Firdaus5*, N A Afandi6, L Ismayenti7
1 Fakultas Psikologi Universitas Gunadarma
2 Fakultas Psikologi Universitas Gunadarma
3 Fakultas Psikologi Universitas Muhammadiyah Purwokerto
4 STIKES Muhammadiyah Bojonegoro
5 Fakultas Psikologi Universitas Gunadarma
6 Prodi Psikologi Islam Fakultas Ushuluddin dan Dakwah IAIN Kediri
7 Prodi Keselamatan dan Kesehatan Kerja, Fakultas Sekolah Vokasi, Universitas Sebelas Maret
[1]* Corresponding author’s email: [email protected]
DOI: https://doi.org/10.20885/icsbe.vol2.art5
ABSTRACT
A literature review that proposes forest therapy is presented in this study. The Indonesian government is creating a forest city as its new capital city, in which this therapy is being explored. If integrated into the forest city in the new capital city, forest therapy offers a variety of physical and psychological health benefits. It is anticipated that the forest city would not only improve the health of the capital’s residents but will also bring about the realization of a world city for all.
Keywords: Forest City, Capital City, Physical Therapy, Psychological Therapy
References
S Fahri[1]*, Fakhruddin3, R Djamaluddin2, R Irmawaty3, H Usman4, and N A Mawaddah4
1Civil Engineering Department, Hasanuddin University, Indonesia.
2Civil Engineering Department, Hasanuddin University, Indonesia.
3Civil Engineering Department, Hasanuddin University, Indonesia.
4Civil Engineering Department, Hasanuddin University, Indonesia.
[1]1* Corresponding author’s email: [email protected]
DOI: https://doi.org/10.20885/icsbe.vol2.art4
ABSTRACT
Today, FRP system is one of the most widely used methods of structural repair and strengthening but the price is relatively expensive. Therefore, it is necessary to develop FRP materials generated from natural fibers that have the potential for high tensile strength, environmentally friendly, and lower costs. In this study, Abaca fiber (Musa textilis) derived from Abaca banana is used as the constituent material of Abaca Fiber Reinforced Polymer Sheet (Abaca FRP Sheet), which will be used as strengthening materials of structural elements. Tensile strength testing was performed as the preliminary test to determine the mechanical properties of Abaca FRP Sheet. Abaca FRP Sheet with and without NaOH treatment was a test variation. The results of the tests were compared to commercial GFRP sheets. ASTM D3039/D3039M-14 Standard Test Method for Tensile Properties of Polymer Matrix Composite Materials is referenced in the test specimens. Alkali treatment changes the structure and visual observation of the abaca fiber. Immersion of abaca fibers in 0.5% NaOH solutions for 30 minutes increased the tensile strength, Young’s modulus (GPa) and Strain at break as compared to the untreated abaca fibers.
Keywords: Abaca Fiber, Glass Fiber, Tensile Strength, Strengthening Material
References
C Oliver A P L[1]* and F Nugraheni1
1 Graduate Student, Universitas Islam Indonesia, Indonesia
[1]* Corresponding author: [email protected]
DOI: https://doi.org/10.20885/icsbe.vol4.art3
ABSTRACT
The construction of the Tugu Dam requires stone material obtained from Quarry for the main dam. The stone material for the main dam is very critical because the work on the main dam should be carried out immediately during the dry season (for work safety and quality). Preparation for material transportation at the Quarry includes calculation of the availability of material volumes, construction of haul roads, and technical plans for transport and blasting management. These activities require surveying and mapping. The project team chose the drone mapping method using the Open-Source program rather than the conventional method for accelerating the surveying and mapping work. Aerial photogrammetry survey can complete a variety of projects, such as available material calculation, blasting management, and hauling road planning. Based on cost, quality, and time analysis, drone mapping using open-source computer programs is cheaper and faster than using paid computer programs and conventional surveying methods, but using Open-source software has the disadvantage of limited features and low data accuracy with a CE90 value = 17,706 and LE90=37,126 for this study. In general, drone mapping has lower accuracy than conventional surveying methods, but the output of drone mapping which is orthomosaic maps and Digital Elevation Models can be used for the development of Building Information Modeling (BIM) and autonomous engineering.
Keywords: Aerial Photogrammetry; Dam; Nonmetric camera drone
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