Jurnal Komposit: Jurnal Ilmu-ilmu Teknik Sipil
Jurnal Komposit: Jurnal Ilmu-ilmu Teknik Sipil is a journal that publishes research results, scientific reviews, theory and applications as well as other information in the fields of science, technology and applied science; especially civil engineering, environmental engineering, and urban management. Jurnal komposit: Jurnal Ilmu-ilmu Teknik Sipil issued biannually, on February and August each year. Articles are written in English or Bahasa Indonesia. Jurnal Komposit: Jurnal Ilmu-ilmu Teknik Sipil has been accredited by SINTA 4 according to the Decree of the Directorate General of Higher Education, Research and Technology, Ministry of Education, Culture, Research and Technology of the Republic of Indonesia, No. 204/E/KPT/2022, dated 3 October 2022. --- --- --- Jurnal Komposit: Jurnal Ilmu-ilmu Teknik Sipil adalah jurnal yang mempublikasikan hasil-hasil penelitian, ulasan ilmiah, teori dan aplikasi serta informasi lain di bidang ilmu pengetahuan, teknologi, dan sains (IPTekS), terutama teknik sipil, lingkungan, dan pengelolaan wilayah-kota. Jurnal Komposit: Jurnal Ilmu-ilmu Teknik Sipil terbit dua kali dalam setahun, pada bulan Februari dan Agustus setiap tahunnya. Artikel yang diterbitkan di dalam Jurnal Komposit: Jurnal Ilmu-ilmu Teknik Sipil dapat dituliskan dalam Bahasa Inggris atau Bahasa Indonesia. Jurnal Komposit: Jurnal Ilmu-ilmu Teknik Sipil telah terakreditasi SINTA 4 sesuai Surat Keputusan Direktorat Jenderal Pendidikan Tinggi, Riset dan Teknologi, Kementerian Pendidikan, Kebudayaan, Riset dan Teknologi Republik Indonesia, No. 204/E/KPT/2022, tertanggal 3 Oktober 2022. --- --- --- ISSN : 26153513 E-ISSN : 2655934X Garuda : https://garuda.kemdikbud.go.id/journal/view/19739 Profil Sinta: https://sinta.kemdikbud.go.id/journals/profile/9515 DOI Current Issue (Vol. 9 (2) 2025): http://dx.doi.org/10.32832/komposit.v9i2 Dikelola oleh (managed by): Program Studi Teknik Sipil Fakultas Teknik dan Sains - Universitas Ibn Khaldun Bogor Jl. KH. Sholeh Iskandar KM. 2 Kd. Badak, Kec. Tanah Sareal - Kota Bogor
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Perencanaan Struktur Gedung Kantor (DPMPTSP, Disnaker, Diskes dan Capil) Kabupaten Gianyar dengan Menggunakan Flat Slab
In the construction, it must be able to be used according to its function so that it can be used for a long time. The concept of construction that has sufficient strength and allows for large spaces without affecting aesthetics has emerged in recent decades. A flat slab is one of the advances in the construction system of a two-way concrete plate that distributes the working load directly to the column element without using a beam. The use of drop panels can increase the strength of the plate by resisting the sliding style of the pons and reducing the negative moment reaction that occurs on the plate and column. In the analysis, the results used a flat slab with a thickness of 200 mm, with bones in the x and y directions at the focus of As D16-100 mm and As’ D16-200 mm, whereas in the columns of column directions x and y, the field part is mounted with As D13-100 mm and As‘ D13-200 mm. In the middle column of directions X and Y, use the bones of As D13-100 mm and As‘ D13200 mm. Used a drop panel of 300 mm. For the lift area, an L type column with dimensions of 450 mm x 450 mm is used. The bars used are TB1, TB2, B1, and RB, and the columns used are 500 mm x 500 mm and 400 mm x 400 mm. The planned foundation uses a cylinder-shaped pillar with a depth of up to 8 meters.
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Perbandingan Mutu Beton terhadap Gaya Geser dan Simpangan pada Bangunan Rutan Kejati
This study examines the planning of high-rise building structures in Indonesia, focusing on the application of Special Moment Resisting Frame (SMRF) systems under seismic conditions. Situated within the Pacific Ring of Fire, Indonesia frequently experiences significant earthquakes due to the convergence of three continental plates. Previous research indicates that the design of high-rise buildings necessitates careful attention to dimensions and reinforcement to ensure structural strength and stability. The SMRF planning method, which applies the principle of strong column weak beam, has been analyzed across various case studies, including designs for office buildings, hotels, laboratories, and educational facilities.Furthermore, this study compares the structural performance using different concrete strengths, specifically 41.5 Mpa and 24.9 Mpa, in the construction of prison walling at the Kejati Detention Center. Through quantitative analysis and structural modeling using ETABS V.20 software, this research identifies differences in base shear and inter-story drift between the two concrete strengths. The findings provide insights into the effectiveness of higher-grade concrete usage and its potential impacts on the strength and structural quality of buildings. The implications of this research can guide practitioners in selecting the appropriate construction materials to enhance performance and cost-efficiency in high-rise building projects in Indonesia.
Analisis Rencana Anggaran Biaya Pembangunan Pos Jaga Militer di Perbatasan Indonesia-Papua Nugini
This research aims to determine the costs required to build a guard post building in the border area of Papua, Indonesia and Papua New Guinea. It is hoped that this research will contribute to improving the national defense, especially regarding the construction of guard posts in national border areas. This research discusses the construction of the guard post by describing the volume of work and the planned cost budget, and the data collection methods used are primary and secondary data. In this research, guard post drawings were planned according to the standards of the Indonesian Army and supporting data in the form of Unit Prices for Goods and Services (SHBJ) in the Papua region, as well as the Ministry of PUPR's Unit Price Analysis Guidelines. Apart from that, the type of work along with the volume of work is arranged followed by an analysis of the unit price of each job. Then the Cost Budget Plan (RAB) is calculated to get the total price for each job. Thus, the total cost required to build a guard post building on the Papua border is IDR 119,441,000.00. In the future, it is hoped that this research can become a reference for building guard posts around the Papua border area.
Perencanaan Tebal Lapisan Perkerasan Lentur Jalan Raya dengan Menggunakan Metode Analisa Komponen SNI 1932-1989F
The location of the Rawa Jitu road, Bone Bawang Regency, Lampung Province, is a collector road of the type 1 lane, 2 directions and has a road width of 11 m consisting of a 7 meter traffic lane and 2 meter right and left shoulders each. In accordance with the road engineering requirements for road sections in the primary network system of the 2020 Minister of Public Works regulations based on the road class where the Rawa Jitu road section is located, including class III roads, road space requirements are needed in order to determine the size limits for each road section to comply with the classification specified. had been planned in advance. At the research location, the Rawa Jitu road section had an average daily traffic of 11,960 passenger cars, 1,300 passenger buses, 500 medium buses, 3,409 medium trucks, 570 large trucks, 20,760 motorbikes. Like road classification, road space requirements have also been regulated in applicable invitation regulations, especially in PP No. 34 of 2006. The road space in question includes road use space (RUMAJA), road property space (RUMIJA) and road monitoring space (RUWASJA). Based on calculations that have been carried out using the SNI 1732-1989F component analysis method with a planned age of 20 and 10 years, the following are layer D plus 5 cm, surface layer 10 cm, top foundation layer 15 cm, bottom foundation layer 20 cm.
Pengaruh Temperatur Pelelehan Plastik Polyethylene Terephthalate terhadap Kuat Tekan Eco-Paving Block
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.
Analisis Biaya dan Waktu Percepatan Proyek Pembangunan Rusun At-Tanwir Cianjur dengan Penambahan Jam Kerja Menggunakan Metode TCTO
The At-Tanwir Foundation’s Flats Construction Project at Cianjur Regency, West Java; aims to provide housing for students and promote education. Therefore, expediting the construction process for immediate utilization is essential to meet the housing needs. One alternative for expediting the project is to increase working hours using the time-cost trade-off method. The purpose of acceleration is to anticipate delays in the project and shorten the project implementation time. This study uses data such as Project RAB, Plan S Curve, a List of Unit Prices of Materials, Tools, and Labor, and an Analysis of Unit Prices of Work. Microsoft Project 2019 software assists in data processing to identify critical paths. After accelerating work on critical activities, the analysis showed that by adding 3 hours of overtime, the project duration can be reduced to 100 working days, which is 15% faster than the normal duration of 119 working days. The optimal cost for this duration is IDR 808,750,195.52, which is 0,69% lower than the normal cost of IDR 803,164,902.33, with a cost difference of IDR 5,585,293.19.
Studi Tingkat Kepuasan Masyarakat Akan Layanan Buy The Service Biskita Trans Pakuan di Kota Bogor Koridor 1
Customer satisfaction is a feeling of pleasure or disappointment of a customer that comes from a comparison between his impression of the performance or results of a product and his expectations. Performance measurement is a method used to provide an assessment of how much the level of work performance or achievement of predetermined goals and objectives. Buy The Service (BTS) is a service purchase subsidy scheme by the government to the operator (private) in terms providing public transportation services with minimum service standards that must be implemented. Transpakuan has been officially operated since November 2, 2021, serving 4 corridors with a total of 49 fleets. One of them is corridor 1 (Terminal Laladon - Cidangiang). A satisfaction assessment is needed to see whether Biskita Transpakuan Bogor customers are satisfied with the service. The indicators used in the evaluation refer to the Regulation of the Minister of Transportation of the Republic of Indonesia Number 27 of 2015 concerning Amendments to the Regulation of the Minister of Transportation Number 10 of 2012 concerning Minimum Service Standards for Road-Based Mass Transportation. This study aims to determine public satisfaction and the level of performance of Buy The Service (BTS) Biskita Transpakuan Corridor 1 services using the Importance Performance Analysis method & the Customer Satisfaction Index method. The results showed that there are 4 (four) attributes that show consumers are satisfied and must be maintained. There are 6 rated ordinary and 7 (seven) attributes rated excessive. The CSI results show a value of 72.79% in the interval 0.51-0.65, meaning that in general Trans Pakuan bus consumers are in the satisfied category, so that Trans Pakuan's overall performance is considered good. Based on the Importance Satisfaction Analysis method, it shows that the aspects that need to be prioritized are the convenience of cleaning facilities at bus stops, waiting time, information on the arrival time of bus cars and information on disturbances.
Pemanfaatan Limbah Serat Alam Kulit Buah Kelor Sebagai Papan Komposit yang Diperkuat Polimer Unsaturated Polyester Resin
The use of Composite Materials with natural fiber reinforcement is starting to be widely known in the manufacturing industry, environmentally friendly and recyclable materials. Composites are made to obtain lightweight structures, have higher strength or stiffness, energy absorption and design, have low prices and natural fibers are also easy to obtain, especially moringa fruit skin which is very abundant in the East Nusa Tenggara region, especially in Sikka Regency. This study aims to determine the Bending strength, impact energy and seawater absorption capacity. The research materials are moringa fruit skin fiber and polyester resin. Moringa fruit skin fiber is a waste that is rarely used so it can be a serious waste. This specimen is used with the Cold Compressing Molding method (Molds that are loaded at room temperature). The results of the study showed optimal conditions at a volume fraction of 25%, providing the highest Bending strength of 8,888 MPa, the highest impact energy of 0.196 J / mm2, and the lowest seawater absorption value of 0.79%.
Analysis of the Effect of Evaluation and Innovation in the Development of Construction Safety Culture on the Safety Leadership Model using SEM Approach
In the construction sector, the Construction Safety Management System (SMKK) has been determined by the Regulation of the Minister of Public Works No. 10 of 2021 as a reference for addressing the risk of industrial accidents and improving building safety. Full implementation of occupational safety (K3) can minimize the risk of work accidents. However, in reality, there are still many obstacles for companies and employees, and many accidents in the workplace are caused by unsafe behavior factors by the workers themselves. The methodology used in this study involves various approaches, such as literature review and primary data acquisition through questionnaires targeting respondents in construction project environments. The collected data will be analyzed using the Structural Equation Modeling method to identify important variables. Data processing was performed using the Smart-PLS version 4.1.0.1 application to determine the outer and inner models. Hypothesis testing was conducted using bootstrapping, considering the Original Sample values, T-statistics, and P-values. Based on the results, it is concluded that safety leadership has a significant indirect influence on improving safety performance. The strengthening of leadership aspects has the largest impact on improving safety culture, which then influences the improvement of construction safety performance, with an original sample (O) value of 0.273, a sample mean (M) of 0.277, a standard deviation (STDEV) of 0.177, a T-statistic value of 2.324, and a P-value of 0.001. Furthermore, effective safety evaluation (e.g., constructive and systematic evaluation) can help build a stronger safety culture, which in turn will improve overall safety performance. The implementation of innovation in construction processes or safety technology can also encourage better safety behavior among workers, which then contributes to improved safety performance.
Pengaruh Penambahan Asbuton LGA 50/30 pada Campuran AC-WC dengan Inovasi Limbah Keramik sebagai Pengganti Sebagian Agregat Kasar
Asphalt is the main ingredient in road pavement mixtures. Indonesia has relied on Pertamina to supply artificial asphalt, but the more abundant natural asphalt has not been utilized. The government is trying to encourage the use of Buton asphalt to optimize the use of natural resources. Limited natural resources also encourage innovation, such as the use of ceramic shard waste as coarse aggregate in road construction. This is important because excessive extraction of raw materials from nature can damage the ecosystem. This study analyzed the effect of adding Asbuton LGA 50/30 to AC-WC with ceramic waste. The method used was experimental with Marshall characteristic parameters. The research results from 5 variations of ceramic waste mixture used with variation values of 10%, 15%, 20%, 25%, and 30%. The highest stability was found in the 10% ceramic waste mixture with a stability value of 1178.14 kg, with a VIM value of 5.05%, VMA value of 17.87%, VFA value of 71.94%, flow value of 2.24 mm, and MQ value of 799.51 kg/mm. The 11% abuton variation level has the highest stability value found in the 10% ceramic variation with the highest stability value of 1660.90 kg, VIM value of 4.97%, VMA value of 16.08%, VFA value of 69.16%, flow value of 2.22 mm, and MQ value of 753.22 kg/mm. Both variants are declared the most effective for AC-WC asphalt mixtures because their Marshall values are in accordance with Bina Marga 2018 specifications, and the ceramic waste variation is the most effective for AC-WC asphalt mixtures
Penanggulangan Timbulan Sampah di Perumahan Bukit Mekar Wangi Menggunakan Bangunan TPS 3R
The problem of waste generation in urban areas continues to increase along with population growth. An increase in population of 0.98% in the research location contributed to the high volume of waste. This research aims to get a design, especially in the layout, structural analysis of the 3R Waste Temporary Shelter (TPS) building and cost budget plan (RAB). In the process of building a TPS 3R building, several technical aspects are considered in order to determine the layout of the building and the strength of the building construction so that it can function optimally. The method used uses structural analysis calculations, while checking beams and columns using ETABS ver.21 software. Based on the structural analysis, the TPS 3R building is planned with dimensions of 19.3 × 4.2 m using reinforced concrete material with a roof covering structure in the form of a concrete deck. The structural material specifications used are concrete with a quality of 22.84 MPa and the yield quality of reinforcing steel (fy) 420 MPa. The dimensions of the column structural elements are K30x30 cm, B20x40 cm main beam and 12 cm thick concrete slab. The structural analysis output of the planned building shows purple-colored columns with a strength ratio of 0.90 to 0.95, indicating that the structure is reasonably safe against working loads. Meanwhile, the black-colored beams indicate that the structure is safe against the working load. Keywords: Waste generation, TPS 3R, Structural analysis.
Kajian Tarif pada Perencanaan KRL-SRRL Fase 1 Berdasarkan Ability to Pay dan Willingness to Pay
Surabaya and the Gerbang Kertasusila Metropolitan Area do not yet have a competent urban public transport system or regional public transport system. The government will introduce electric-based public rail transportation or known as KRL-SRRL in the Kertasusila Gate area. Construction of KRL-SRRL Phase 1 across Surabaya Pasar Turi-Sidoarjo, if operational, will overlap with the Local Train which is now operating. In future KRL-SRRL phase 1 operations, the operator must consider the purchasing power of prospective KRL-SRRL phase 1 users. This research aims to examine how affordable the purchasing power of prospective KRL-SRRL users is based on Ability to Pay (ATP) and Willingness to Pay (WTP) and knowing the relationship between ATP and WTP. The method used to determine the ATP value of potential KRL-SRRL service users is based on income and expenditure on transportation services used household budget method. The WTP value of potential KRL-SRRL service users is based on the average expected fare preference using the approach discrete choice analysis with model logit binominal. Overall, the average ATP for prospective KRL SRRL passengers with SBY-SDA relations is IDR 475,28/km. Meanwhile, the WTP for prospective KRL SRRL passengers with SBY-SDA relations is IDR 341,42/km. The fare that prospective KRL-SRRL passengers can afford is a maximum flat fare of IDR 13,000 for one trip from SBY-SDA. The relationship between ability to pay (ATP) and Willingness to pay (WTP) analysis results show that the ATP value is greater than the WTP value. This shows that prospective KRL SRRL passengers with SBY-SDA relations are choice riders.
Eksplorasi Pengaruh Persepsi Aksesibilitas terhadap Pemilihan Moda Pekerja Komuter di Koridor LRT Jabodebek Lintas Bekasi
This study aims to explore the relationship between perceived accessibility and mode choice preferences of commuting workers, particularly in the newly operational Jabodebek LRT transportation corridor. The research compares the extent to which perceived accessibility explains actual accessibility and reduces perceived accessibility, measured through Likert-scale variables, using principal component analysis (PCA). Mode choice preferences are constructed using stated preferences, and factors such as socio-demographics, travel characteristics, and PCA results on perceived accessibility are estimated using multinomial logistic regression.The study's findings indicate that, although the distance to LRT stations can be objectively measured, individual perceptions of this distance vary. Differentiation based on actual accessibility is also assessed to influence decision-making by travelers in choosing transportation modes. Several socio-demographic and travel factors are found to influence preferences for the LRT and bus modes. Meanwhile, subjective aspects, such as satisfaction with transportation modes, travel time, and travel costs, are found to significantly affect transportation mode preferences.
Pengaruh Penambahan Limbah Marmer terhadap Campuran AC-WC dengan Asbuton LGA 50/30
The AC-WC asphalt layer is the layer that has the smoothest structure compared to other layers. The presence of a tightly graded mixture that has few voids in the AC-WC asphalt mixture causes this layer to be sensitive to variations and mixture proportions. This research uses innovative marble waste materials with the aim of analyzing the effect of adding Asbuton LGA 50/30 to AC-WCs with marble waste. The method used is experimentation with Marshall characteristic parameters. The research results of 5 variations of marble waste mixtures were used with variation values ​​of 15%, 20%, 25%, 30% and 35%. For asbuton with a 9% VIM value, there are 4 variants that do not meet Bina Marga specifications, namely 15%, 25%, 30% and 35%. Meanwhile, 12% asbuton is found in the Flow value in the 15% and 20% variants. The highest stability variation value of 9% asbuton was found in a mixture of 35% marble waste with a stability value of 1817.22kg, with a VIM value of 3.20%, a VMA value of 16.18%, a VFA value of 85.17%, a flow value of 3.95 mm , and the MQ value is 684.24 kg/mm. The 12% abuton variation content has the highest stability value found in the 15% marble variation with the highest stability value of 1856.30kg, VIM value of 4.11%, VMA value of 15.700%, VFA value of 75.326%, flow value of 3.80 mm, and MQ value 632.86kg/mm. These two variants were declared the most effective for AC-WC asphalt mixtures because their Marshall values ​​are in accordance with the 2018 Bina Marga specifications
Manajemen Pengendalian Risiko pada Proyek Pembangunan Gedung Perpustakaan Bandar Lampung dengan Metode IBPRP
Every construction project carries inherent risks that can lead to accidents, which may range from minor injuries to deadly incidents and even fatalities. To diminish the chances of work-related accidents at the project site, it is crucial to adhere to regulations pertaining to occupational health and safety (K3). This study seeks to identify potential hazards and evaluate risk factors associated with all activities in the Bandar Lampung Library Building Construction project, as well as to analyze risk control employing the HIRARC method (Hazard Identification, Risk Assessment and Risk Control). The findings from the risk matrix assessment prior to implementing risk control indicated 75 potential risk hazards, which included: 14 activities identified as extreme risk, 47 activities in the high risk category, 12 activities classified as moderate risk, and 2 activities deemed low risk. The activities with the most significant potential hazards include: roof installation and keet directors, casting work, iron installation work, and formwork work. Following the risk control process, modifications were made in the risk level for each type of work. There were 9 potential hazards classified as high risk, 11 potential hazards categorized as moderate risk, and 55 potential hazards grouped in the low risk category. This illustrates the significance of implementing risk control measures to ensure all potential hazards can be managed and reduced.
Subgrade Optimization with Coconut Shell Ash Addition on Glee Gurah Clay Soil
Improving subgrade bearing capacity is a crucial aspect of highway construction. Clay soils, which have high plasticity and low bearing capacity, often require improvement to increase their stability and strength. This research examines the effect of coconut shell ash addition on the bearing capacity of clay soil in Glee Gurah village. The research aims to identify the impact of coconut shell ash stabilization on the mechanical characteristics of clay soil as a highway subgrade, focusing on soil compaction and CBR values. The research was conducted through a series of laboratory tests which included soil classification according to AASHTO and USCS, as well as compaction (Proctor) and CBR testing. The percentage variations of coconut shell ash used were 0%, 3%, 6%, 9%, and 12%. The results showed that the addition of coconut shell ash increased the bearing capacity of clay soil. The maximum dry volume weight increased from 1.464 gr/cm³ (no mixture) to 1.540 gr/cm³ at the addition of 12% coconut shell ash. The optimum moisture content decreased with increasing ash percentage, from 22.70% to 20.20%. The unsoaked CBR value also increased significantly, from 11.06% (no mixture) to 17.78% at the addition of 12% coconut shell ash, with a total CBR percentage increase of 60.80%. Thus, the use of 12% coconut shell ash > 20% (Good), so that ANOVA shows a p value <0.05, which means that the addition coconut shell ash significantly increases the bearing capacity of clay soil and is effective in strength of subgrades with moderate traffic categories. Key words: Stability, clay, Pavement, subgrade
Penilaian Green Building Gedung Kuliah B Fakultas Ekonomi dan Bisnis Universitas Lampung Berdasarkan Kriteria Green Building Council Indonesia
Lampung University plays an active role in implementing and campaigning for green development, so a study is needed that can be used as part of the implementation of the Green Building concept. The selection of the location of Building B FEB is based on the condition of the building which is still new so that it is expected to be easier to improve. The research method includes a survey of building conditions, interviews, and assessment of six green building criteria based on the Green Building Council Indonesia (GBCI) version 1. These criteria include Appropriate Site Development (ASD), which emphasizes the selection of a location and sustainable management of the surrounding environment; Energy Efficiency and Conservation (EEC), which focuses on reducing energy consumption and implementing energy-saving technologies; Water Conservation (WAC), which highlights the efficiency of water use and management; Material Resource and Cycle (MRC), which refers to the use of environmentally friendly and easily recycled materials; Indoor Health and Comfort (IHC), which includes air quality, lighting, acoustics, and occupant thermal comfort; and Building Environmental Management (BEM), which focuses on sustainable building operations, including waste management and maintenance. The results of the survey and field analysis show that the total Green Building assessment score of Building B FEB Unila is 37, which is in the Bronze category. Efforts that can be made to increase this value include the commitment of the entire academic community in environmental campaigns, reducing the use of private motor vehicles, and water conservation in building management.
Studi Komparatif Stabilitas Timbunan Tanah dengan Perkuatan Sabut Kelapa Menggunakan Software GeoStudio Slope/W terhadap Hasil PLAXIS
Infrastructure development often faces slope stability challenges due to suboptimal soil conditions. One possible solution is the use of coconut coir as a soil reinforcement material to improve slope stability. This study analyzes the stability of embankment slopes reinforced with coconut coir using GeoStudio Slope/W 2012 software with the limit equilibrium Method and compares the results with Fahriani's (2016) study, which utilized Plaxis. The analysis was conducted on embankment slopes with varying percentages of coconut coir addition (0%–5%) using five limit equilibrium Methods: Morgenstern-Price, Spencer, Bishop Simplified, Janbu Simplified, and the Ordinary Method of Slices. The results indicate that all analysis Methods show an increase in the factor of safety (FoS) as the percentage of coconut coir increases. The comparison with Plaxis results shows a small FoS difference, ranging from 0.154% at 0% coconut coir to 1.397% at 5% coconut coir, with 0%–3% having a difference of less than 1%, indicating that both Methods provide relatively consistent results. The trend of increasing the factor of safety due to the addition of coconut coir remains similar in both software programs, reinforcing the effectiveness of coconut coir as a slope reinforcement material.
The Effect of Waste Flex Banner Fiber on Mechanical Properties of Geopolymer Concrete
This research aims to design a geopolymer concrete mix with the addition of waste flex banner fiber and to study its effects on various physical and mechanical properties of the concrete. The study focuses on the influence of flex banner fiber on the density of geopolymer concrete, workability with a target slump value of 90 mm, and the compressive and splitting tensile strength with flex banner fiber additions of 0.5%, 0.75%, and 1.0% by weight of fly ash. The research method involves curing the concrete in water for 7, 14, and 28 days. The results indicate that the addition of flex banner fiber increases the density of geopolymer concrete, achieving an optimal density of 2462.83 kg/m³. This study also shows that the workability of the flex banner fiber mix in geopolymer concrete meets the target slump value of 90 mm at a 0.75% fiber addition. As the fiber percentage increases, a significant reduction in slump value occurs. At 0.5% fiber content, the slump value decreases to 110 mm, while at 1% fiber content, the slump value drops to 53 mm. The addition of flex banner fiber improves the mechanical properties of geopolymer concrete. The compressive strength of geopolymer concrete with 0.75% fiber addition increases by 4.19%. Furthermore, the optimal splitting tensile strength is achieved with a 0.61% flex banner fiber addition.
Simulasi Hujan-Debit di DAS Kedung Larangan Menggunakan Software HEC-HMS
Flooding is a problem that often occurs in Indonesia, especially in Bangil-Pasuruan area, where every year always inundates several sub-districts there, 3 sub-districts are often submerged with a depth around 30-50 cm. The Bangil sub-district area is downstream in Kedunglarangan Watershed, where upstream in the Prigen sub-district. With these problems, appropriate mitigation is needed, an approach study in form of flow analysis is needed to provide appropriate handling. The rainfall discharge simulation method is an important tool in hydrology, one of the models used is using HEC-HMS software. Rainfall - discharge simulation in Kedunglarangan Watershed using HEC-HMS software using SCS Curve-Number method on runoff volume, SCS unit hydrograph on direct runoff. In analysis using modeling parameters such as initial abrasion, curve number, and time lag. This study aims to analyze the maximum discharge with a certain return period that can be used a reference in flood mitigation planning. In this study, the peak discharge was found at a 2-year return period of 75.9m3/s, a 5-year return period of 120.5m3/s, a 10-year return period of 154.7m3/s, a 20-year return period of 202.7m3/s, a 50-year return period of 241.6m3/s, and a 100-year return period of 282.7m3/s.
Penilaian Manajemen Risiko K3 menggunakan Metode Severity Index pada Proyek Pembangunan Gedung Laboratorium Terpadu II ITK
ITK II is an integrated laboratory building construction project currently does not involve identifying hazards, risk assessment, determining risk levels, or comprehensive risk control. The results of observations and interviews by the author show that dangers can arise due to workers' implementation, actions, and unsafe conditions. Based on these conditions, it is necessary to carry out a risk analysis with the aim of knowing what risks may occur, knowing the dominant risk level, and knowing the dominant risk response, as well as providing recommendations for effective risk control on the ITK II Integrated Laboratory Building Construction Project. The approach applied in this research includes a qualitative approach, namely at the survey, observation, interview, and distribution of questionnaire stages, and a quantitative approach is used to assess the probability and impact of risks, sort risks from highest to lowest, categorize risks, and design mitigation. risk. The severity index method is used to calculate the probability and impact of an event. The calculation is carried out based on responses from respondents using a Likert scale and validated by experts. Then, an analysis of the risk response to the dominant risks is carried out. In the relevance test, the results obtained were 22 relevant variables and 3 irrelevant variables. Furthermore, during the validity test and reliability test, the results of the two tests obtained for each variable were valid and reliable. After that, the risk level was calculated, and 15 dominant sub-risks were obtained with a probability and impact matrix value of 9 in the "high" risk category. Risk responses that can be given are: placing safety signs in the work area, using PPE, increasing signs in each corner of the project, holding short meetings to discuss worker safety aspects regularly before starting work, wearing anti-slip shoes when working in a work environment where there is a risk of slipping, and carrying out regular field supervision.
The Influence of Subgrade CBR Value and Concrete Quality on Rigid Pavement Thickness (Case Study: Desa Simpang/Berbak to Simpang Ma. Sabak Road)
Roads are the primary infrastructure for land transportation, facilitating traffic from one place to another. The road from Desa Simpang/Berbak to Simpang Ma. Sabak in Muara Sabak Timur District, Tanjung Jabung Timur Regency, faces a significant issue with low California Bearing Ratio (CBR) values of the subgrade soil. These low CBR values can lead to instability and deformation of the subgrade, ultimately damaging the rigid pavement built upon it. This study aims to evaluate the influence of subgrade CBR values and concrete quality on the thickness of rigid pavement for the road from Desa Simpang/Berbak to Simpang Ma. Sabak. The research employs a quantitative approach using the AASHTO 1993 method. The results indicate that subgrade CBR values and concrete quality significantly affect the thickness of rigid pavement. Higher CBR values allow for a reduction in concrete slab thickness, while higher concrete quality increases the modulus of elasticity and flexural strength of the concrete, enabling a reduction in slab thickness. However, the influence of CBR values is more significant than that of concrete quality, particularly at higher concrete grades.In conclusion, improving subgrade CBR values is more effective in reducing rigid pavement thickness than solely enhancing concrete quality. Further economic analysis is recommended to evaluate the most cost-effective combination of concrete quality and subgrade CBR values, considering both construction and long-term maintenance costs.
Pengembangan Teori Tekanan Lateral Aktif pada Dinding Penahan Tanah Menggunakan Metode Elemen Hingga
Estimating the value of lateral earth pressure acting on a rigid retaining wall is very important in the design of geotechnical structures. Various theories have been developed to calculate lateral earth pressure, each with it is own methodologies, equations, and assumptions. However, none of the studies above considered the lateral earth pressure equation based on the finite element method. In this study, conventional methods and finite element methods are used to determine the amount of active lateral earth pressure that occurs in the retaining wall, and a finite element method-based equation of active lateral earth pressure is proposed. Parametric experiments were also conducted to determine the active lateral earth pressure distribution's response to various parameters.
Analisis Stabilitas Tanggul Sungai Citonjong Kabupaten Pangandaran
The Citonjong River, located within the Ciwulan-Cilaki Watershed (DAS) in West Java, frequently experiences flooding due to reduced catchment capacity, sedimentation, and embankment instability. This study analyzes the stability of the Citonjong River embankment at four design segments (TPT 2.5 m, 3.6 m, 4.5 m, and 5.0 m) using GEO5 2022 software. The analysis includes the stability of cantilever structures, pile capacity, slope stability, and lateral deformation under both static and seismic conditions, with low water levels and flooding. Geotechnical parameters were obtained from field investigations, while structural parameters adhere to the SNI 8460-2017 standards. The results indicate that all segments meet the minimum safety factors for overturning (1.5 static, 1.1 seismic), slope stability (1.5 static, 1.1 seismic), and vertical bearing capacity (2.5), with lateral deformation remaining below the 60 mm threshold. Recommendations include the installation of erosion protection, such as gabions or riprap, at river bends to enhance the passive resistance of the Continuous Concrete Sheet Piles (CCSP).
Penerapan Sistem Manajemen Keselamatan dan Kesehatan Kerja (SMK3) pada Proyek Konstruksi Gedung di Kawasan Inti Pusat Pemerintahan Ibu Kota Negara (IKN)
The implementation of the Occupational Safety and Health Management System (SMK3) in construction projects is an absolute necessity considering the high potential risk of work accidents. This study aims to evaluate the extent to which SMK3 is implemented in the construction project of the POLRI and BIN Flats (Rusun) in the Core Area of ​​the Government Center (KIPP) of the National Capital City (IKN). The research method used is a quantitative approach by distributing questionnaires to 106 respondents consisting of project managers, supervisors, and field workers. The results of the analysis show that the average level of SMK3 implementation is in the good category (mean = 4.06 on a scale of 5). The highest indicators are in the safety culture aspect and the role of the K3 manager. However, there are still challenges in the logistics and coordination aspects across jobs. This study recommends increasing the integration of safety technology and regular training for workers.