Media Ilmiah Teknik Sipil

Pengaruh Pasir Laut Sebagai Alternatif Pengganti Pasir Sungai Pada Campuran Beton Mutu Normal

Lilis Indriani — 2026-01-31

The demand for concrete as a construction material continues to increase along with infrastructure development, resulting in intensive use of river sand as fine aggregate and potential environmental degradation. Therefore, sustainable alternative materials are required, one of which is sea sand that is abundantly available in coastal areas. This study evaluates the feasibility of sea sand from Kuala Pembuang, Seruyan Regency, as a substitute for river sand in normal-strength concrete and analyzes the relationship between sea sand content and concrete compressive strength. The research employed a laboratory experimental method with sea sand substitution levels of 0%, 50%, and 100%. Compressive strength tests were conducted at curing ages of 7 and 28 days, and the data were analyzed using quadratic polynomial regression. The results show that the relationship between sea sand substitution and concrete compressive strength can be expressed by the equation Y=317.5+0.7550X+0.0175X², indicating that variations in sea sand proportion significantly influence concrete strength. Based on these findings, sea sand from Kuala Pembuang has potential to be used as an alternative fine aggregate for normal-strength concrete at appropriate substitution levels.

Analisis Bottom Ash Limbah Batu Bara PLTU Pulang Pisau Sebagai Agregat Halus Pada Campuran Beton

Diharyo Diharyo — 2026-01-31

Bottom ash is a solid waste product of coal combustion at coal-fired power plants (PLTU), the volume of which continues to increase in line with growing energy demand. One potential use of bottom ash is as a substitute for fine aggregate in concrete mixes, thereby reducing the use of natural sand and minimizing the environmental impact of waste disposal. This study aimed to analyze the physical characteristics of bottom ash from the Pulang Pisau PLTU and evaluate its compliance with SNI 1969-2008 and SNI 1970-2008 testing requirements. The research phases included bottom ash sampling, physical characteristic testing (gradation analysis, specific gravity, water absorption value, and silt content), and subsequent evaluation against standard characteristics in accordance with SNI 1969-2008 and SNI 1970-2008. The results showed that the bottom ash from the Pulang Pisau PLTU had a fine, irregular gradation, a specific gravity lower than natural sand, and high porosity, potentially affecting the water absorption rate of the concrete. Overall, the bottom ash from the Pulang Pisau PLTU (Coal-fired Power Plant) is deemed suitable for use as an alternative to fine aggregate in concrete mixes. This utilization not only supports the reduction of natural aggregate use but also provides a more sustainable solution for industrial waste management.

Analisis Dampak Pembangunan Gedung Terhadap Kinerja Jaringan Jalan Di Kecamatan Murung Pudak, Kabupaten Tabalong

Muya Ryan Hidayat — 2026-01-31

The development of buildings in urban areas has the potential to increase trip generation and attraction, which in turn affects the performance of the surrounding road network. This condition needs to be examined, particularly in areas with relatively high traffic growth, such as Jl. Ir. PH. Moch. Noor, Murung Pudak District, Tabalong Regency. This study aims to evaluate existing traffic conditions and road performance, and subsequently compare them with the performance of the road network after the building becomes operational. The methods employed include traffic volume surveys on four road segments surrounding the development site, road capacity analysis based on the Indonesian Highway Capacity Guidelines (PKJI) 2023, and traffic projection modeling using trip generation (ITE), trip distribution (Furness method), and traffic assignment with the CONTRAM software. The results indicate that under existing conditions, road performance ranges from Level of Service (LOS) A to C. However, in the five-year post-operation projection, several road segments experience an increase in the degree of saturation, reaching LOS D, particularly on segments with the highest traffic volumes. The newly generated and attracted trips, combined with overall traffic growth, have the potential to degrade road performance if not accompanied by adequate traffic management and access control measures implemented by the facility operator to maintain the performance of the road network.

Analisis Geometri Jalan Tambang Batubara Pada Kegiatan Overburden Removal di PT Satria Alam Manunggal Site TOP Desa Buhut Jaya Kabupaten Kapuas Provinsi Kalimantan Tengah

Anisa — 2026-01-31

This study was conducted at PT Satria Alam Manunggal Site TOP to analyze the effect of road geometry conditions on the performance of Scania P410-B6x4 transport equipment in overburden material transportation activities. The haul route from the front to the disposal site is 2.4 km long, with an average hauler productivity of 33 BCM/hour, while the company's target is set at 40 BCM/hour. This situation indicates an issue with the hauler's travel time when transporting overburden material from the front to the disposal site, resulting in the hauler's productivity not being achieved. The analysis was conducted by dividing the haul road into 29 segments, consisting of 27 straight segments and 7 curved segments. The minimum width of straight roads is 9.1 meters for two lanes and 5.2 meters for one lane, while for curves, the minimum width is 16.29 meters and 9.31 meters, with a maximum road gradient (grade) of 8%, as well as other elements such as curve radius, superelevation, cross slope, safety berm, and drainage channels, also affect operational comfort and safety. The objective of this study is to evaluate and provide recommendations for road geometry improvements to meet technical standards, thereby reducing travel time and increasing transportation vehicle productivity.

Perilaku Mekanik Model Castellated Beam Pada Struktur Girder Baja Pedestrian Bridge Dengan Metode Elemen Hingga

Syahril Taufik — 2026-01-31

Castellated Beam

is an efficient steel structure innovation, but it has the potential for Local Buckling due to holes in the web. Formation of Castellated Beam profiles from Hot Rolled Section WF 350x175x11x7 profiles to CB 525x175x11x7. The study analyzed the behavior of Castellated Beam models with variations in hexagonal hole cutting angles, flat structure geometry, camber and hybrid configurations. Element method analysis up to ANSYS R2025 steel girder structure application modeled 3D Shell Element SHELL181. The Shell Model is more accurate in representing the Castellated Beam structural response and is more efficient and easy in the computational modeling process, more suitable for the analysis of the Castellated Beam structure. The results of the 52° cutting angle study resulted in maximum strength. Castellated Beam camber with stiffener increases the ultimate load by 88.78% and decreases deformation by 40.36%. Hybrid configuration by improving the quality of the top flange can increase the performance of the structure by 40.38% by lowering the maximum voltage by 10%. The addition of a diaphragm to a double hybrid Castellated Beam un-camber span of 12 m and a distance between girders of 2.65 m can reduce deformation by 33.41%. Hybrid Castellated Beam camber is optimal in improving the performance of the structure efficiently. An increase in structural strength is obtained with an increase in maximum load that results in a bending stress close to the melting stress of each Castellated Beam hybrid element of about 90%-95%.

Analisis Kinerja Simpang Bersinyal Dan Penanganan Dampak Kemacetan Pada Jalan Raya Jenggala – Jalan Raya Pahlawan Kecamatan Gedangan Dengan Metode PKJI 2023

Efristka Anggraeny — 2026-01-31

The Jenggala Highway – Pahlawan Highway intersection is located in an industrial warehouse area and adjacent to a railway crossing. This condition causes this intersection to have a high level of traffic activity and causes congestion. From these problems, the performance of this intersection has a saturation degree of 1.07 in the afternoon and an intersection delay of 54.87 seconds/SMP. Therefore, this intersection requires treatment to make the intersection performance more efficient. The treatment carried out was replacing the signal phase setting from initially 2 phases to 3 signal phases and East approaches are not allowed to turn left. So the saturation degree value after treatment was 0.75 in the afternoon and a decrease in intersection delay of 37.90. This saturation degree value has met the performance requirements for signalized intersections, which is less than 0.85 according to the handbook Indonesian Road Capacity (PKJI) 2023.

Analisis Penerapan Supplied By Owner Material Konstruksi Beton Terhadap Biaya Dan Tingkat Komponen Dalam Negeri (TKDN) Pekerjaan Konstruksi Jaringan Irigasi Ciwates

Aditya Wibawa Mukti — 2026-01-31

Amidst global food security challenges and post-pandemic economic fluctuations, the development of robust agricultural infrastructure has become an inevitable national priority, as outlined in Presidential Instruction Number 2 of 2025. However, fiscal realities at the regional level often present a paradox: the need for infrastructure rehabilitation is increasing while fiscal space is narrowing. This research highlights this phenomenon in Serang Regency, where the budget trend for irrigation management shows a significant decline from 2021 to 2025. This thesis proposes and tests the effectiveness of the Supplied by Owner (SBO) procurement method as a technocratic solution to bridge this gap. Through a case study approach on the Ciwates Irrigation Network Improvement project, this research conducts an in-depth comparative analysis of two key variables: construction cost efficiency and the optimization of Domestic Component Level (TKDN) in concrete works. The methodology combines contract document analysis, market price simulation, and material supply chain audit. The research results reveal empirical findings that the implementation of SBO is capable of generating a cost efficiency of 3.04% (equivalent to IDR 57,380,000.00) from a total conventional project value of IDR 1,886,459,000.00 to IDR 1,829,079,000.00. More significantly, this method proved to be a strong catalyst for increasing TKDN through the use of PT. Conch Cement Indonesia products, recording an increase of 9.21 percentage points from 52.18% to 61.39%. These findings confirm that SBO is not merely a savings mechanism, but a strategic instrument for quality control and the affirmation of national industrial policy. This study recommends the institutionalization of SBO in regional procurement regulations for material-intensive projects.

Evaluasi Teknis Geometrik Jalan pada Ruas Jalan Menuju Bandara Syamsudin Noor

Emma Ruhaidani — 2026-01-31

Syamsudin Noor Airport is located in Landasan Ulin District, Banjarbaru City, South Kalimantan Province. The geometric condition of the road on the new road to Syamsudin Noor Airport has a horizontal arrangement of several bends that are not comfortable for road users. The corners reviewed there are 2 corners at STA 3+140 and STA 3+580. The purpose of this study is to evaluate the existing conditions using the 1997 Bina Marga standard and Re-design using the 2021 Bina Marga standard. The research method used in this study is an analysis method of existing conditions using the 1997 Bina Marga standard and Re-design using the 2021 Bina Marga standard. As for the data on field speed, road width, shoulder width, road traffic and visibility are obtained through direct measurements and observations. Based on the results of research conducted in the field, the existing geometric conditions of the road were obtained, in the existing conditions the speed from the observation results was used 64 Km / Hour. The condition at turn 1 has a value of Rc > Rmin so that it meets the requirements of the 1997 Bina Marga standard, while at turn 2 it does not meet because Rc < Rmin. The superelevation at turns 1 and 2 did not meet the 1997 Bina Marga standard of en = 2%.

Audit Keselamatan Jalan Sebagai Penanganan Kawasan Rawan Kecelakan Pada Ruas Trikora KM 2 - 4 Kota Banjarbaru Kalimantan Selatan

Dyah Pradhitya Hardiani — 2026-01-31

The Trikora Road section at Km 2–Km 4 in Banjarbaru City is one of the locations with a high rate of traffic accidents, making a road functional feasibility assessment necessary to evaluate road conditions and identify factors contributing to non-compliance with technical standards. This study aims to assess road functional feasibility based on the Regulation of the Minister of Public Works Number 11/PRT/M/2010 concerning Procedures and Requirements for Road Functional Feasibility. The research method was conducted through a field survey by comparing existing road conditions with technical standards for each road component and subcomponent, which were then classified into functional feasibility categories. The results indicate that 42.86% of the Trikora Road section falls into the Conditional Functional Feasibility (***) category, indicating that some technical requirements have been fulfilled and the road is still able to provide safety for road users. In addition, 42.86% of the section is categorized as Downgraded Functional Feasibility (**), indicating that several road components do not meet technical standards and require improvement. Meanwhile, the functional feasibility assessment of road facilities directly related to road users shows a Not Functionally Feasible (T) category of 14.29%, indicating the need for immediate corrective actions. The recommended improvements focus on enhancing road facilities and improving traffic management to reduce accident risk and increase road user safety and comfort.

Analisis Kinerja Ruas Jalan Akibat Hambatan Samping (Studi Kasus : Jalan Soekarno Hatta, Labuhan Bajo, Manggarai Barat)

Anie A. Tuati — 2026-01-31

Labuan Bajo is the city center of West Manggarai Regency, known as a tourist city that has one of the seven wonders of the world, namely the Komodo Island tourist attraction, which makes Labuan Bajo city crowded with local and foreign tourists. There are several road sections in Labuan Bajo that are still ineffective due to certain factors. One of them is the performance of the Soekarno Hatta road section which is still ineffective due to the activities of food places (culinary tourism of the village end), docks, shops, hotels and offices that cause roadside obstacles that cause congestion. The performance of the road section is analyzed based on the Indonesian Road Capacity Guidelines (PKJI) in 2023. Based on the results of research and field observations, it shows that the large number of vehicles parked and stopped (side obstacles) on the road section is not balanced with parking facilities. This results in the actual speed of the road section becoming lower at 13 km / h. The performance of the road section based on the results of the saturation degree analysis (Q/C ratio) is at service level F with a saturation degree (DS) value of 1.08, with volume above road capacity, long queue, and low speed, because internal resistance is very high and drivers are starting to experience short-duration congestion.

Model Prediksi Tinggi Muka Air Sungai Menggunakan Jaringan Syaraf Tiruan

Agusman — 2026-01-31

This study developed a water level prediction model using the integration of Artificial Neural Network (ANN) and Long Short-Term Memory (LSTM). ANN maps nonlinear relationships between hydrological parameters, while LSTM captures temporal dependence patterns in time series data. The comparison results of four models—Linear Regression, ANN, LSTM, and ANN–LSTM hybrid—showed that the neural network-based model provided significantly better prediction performance than the linear model. The Linear Regression model produced the largest error (MSE 0.0175; RMSE 0.128; MAE 0.103; R² 0.785), followed by ANN with a significant increase in accuracy (MSE 0.0114; RMSE 0.101; MAE 0.0549; R² 0.874). LSTM provided better results (MSE 0.0048; RMSE 0.067; MAE 0.0472; R² 0.902), but the best model was the hybrid ANN–LSTM with the lowest error value (MSE 0.00417; RMSE 0.063; MAE 0.0388) and the highest R² (0.937). This combination is able to capture nonlinear patterns and temporal dynamics more optimally, resulting in stable and accurate predictions. In addition, this study shows that the Duflow hydrodynamic model has the potential to be developed as a mitigation simulation tool for water level management, such as testing extreme rainfall scenarios, spatial changes, flood control infrastructure operations, channel optimization, and simulating the impacts of climate change.

Dampak Lalu Lintas Pembangunan Rumah Sakit Nur Hidayah Bantul Terhadap Ruas Jalan Yogyakarta – Barongan Dengan Metode PKJI 2023

Azri Novadli — 2026-01-31

The construction of Nur Hidayah Bantul Hospital is located on Jalan Yogyakarta–Barongan, Bembem, Trimulyo, Jetis District, Bantul Regency, Special Region of Yogyakarta, which is expected to have a significant impact on the surrounding road network. Nur Hidayah Bantul Hospital has a land area of 2131 m² with a building area of 5110 m² and is planned to have 5 floors. The construction process will involve intensive construction activities, such as the mobilization of heavy equipment, transportation of materials, and the entry and exit of workers. This will cause construction traffic generation that will affect the smooth flow of vehicles on the road network, especially the Yogyakarta–Barongan Road section. The government has emphasized that every planned development of activity centers, settlements and infrastructure that will cause disruption to security, safety, order, and smooth traffic and road transportation must be subject to a traffic impact analysis as regulated in the Minister of Transportation Regulation No. 17 of 2021. The purpose of this study is to analyze the existing traffic performance on the Yogyakarta-Barongan Road Section, as well as to analyze changes in traffic performance on the Yogyakarta-Barongan Road Section due to the construction of the Nur Hidayah Bantul Hospital using the 2023 PKJI method. The results of the study showed a decrease in road performance during the construction of the Nur Hidayah Bantul Hospital compared to existing conditions, with a DJ value of 0.48 during the existing period and 0.52 during construction.