cover
Contact Name
M. Uswah Pawara
Contact Email
uswah.pawara@lecturer.itk.ac.id
Phone
+6285244317201
Journal Mail Official
ismatech.journal@itk.ac.id
Editorial Address
Gedung B306. Jl. Soekarno Hatta No.KM 15, Karang Joang, Kec. Balikpapan Utara, Kota Balikpapan, Kalimantan Timur 76127
Location
Kota balikpapan,
Kalimantan timur
INDONESIA
Indonesian Journal of Maritime Technology or abbreviated (ISMATECH)
ISSN : -     EISSN : 3025518X     DOI : https://doi.org/10.35718/ismatech.v1i1
Core Subject : Engineering,
Focus and Scope Research titles encompassed by this journal include, but are not limited to: Naval Architecture: covering ship strength, Ship Hydrodynamics, Ship Construction, Ship Production Management, Wooden and FRP Ship Materials, Ship Design Innovation, Ship Vibration and Noise, Welding Technology, Fatigue, Sea Transportation, Computational Fluid Dynamic Modeling. Marine Engineering: encompassing Engine Performance, Renewable Fuels, Dual fuel system, Ship electricity, Ship Resistance, Ship piping systems, Ship reliability). Ocean engineering: Marine and Offshore Structures, Coastal Structures and Management, Port Structures and Management, Subsea Umbilicals, Risers and Flowlines (SURF), Ocean Renewable Energy, Marine Instrumentation, Marine Pollution. Mechanical engineering: addressing Tribology, Energy Studies, Engines and Turbines, Heat Transfer, Fluid Mechanics, Lubrication and Wear, Materials Science, Mechatronics, Refrigeration and air conditioning, Pressure analysis, Structural and mechanical design, Renewable energy, Structural mechanics, Thermodynamics, Materials processing, Vibration).
Articles 62 Documents
Development of River Port (Kelotok) In Penajam Paser Utara and Balikpapan by using BOR, LF, AHP and Triangulation Analysis Arief Hidayat; Johannes Diva Mahendra; Shintaro Terabe
Indonesian Journal of Maritime Technology Vol. 4 No. 1 (2026): Volume 4 Issue 1, June 2026
Publisher : Naval Architecture Department, Kalimantan Institut of Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35718/ismatech.v4i1.8482016

Abstract

The River Port in Penajam Paser Utara, East Kalimantan, serves as a vital transportation link connecting the coastal areas between Penajam Paser Utara and Balikpapan. Despite its strategic role, the port currently faces challenges, including limited berth capacity, insufficient supporting facilities, and low operational efficiency in River water transport services. This study, conducted in 2024, aims to analyze the operational characteristics of the River Port and transportation system, evaluate dock efficiency using the Berth Occupancy Ratio (BOR) and Load Factor (LF) methods, and determine infrastructure and service development priorities through the Analytic Hierarchy Process (AHP) approach. The research employs a quantitative, descriptive-analytical method that integrates primary and secondary data. The results show that the port’s operational performance requires improvement in dock utilization efficiency and passenger load distribution. Development priorities emphasize increasing transport capacity, optimizing service schedules, enhancing accessibility, and providing essential facilities such as comfortable waiting areas and improved safety systems. The findings highlight that sustainable River transportation development is crucial to supporting urban mobility and regional economic growth in East Kalimantan. Strategic recommendations from this study are expected to strengthen the competitiveness and reliability of River Port services.
Utilization of Egg Shell Powder as a Filler in Asphalt AC-WC (Asphalt Concrete-Wearing Course) Mixture on Air Flow and Absorption Characteristics Hijriah Hijriah; Syifa Fauziah; Priyo Wibisono; Ardiansyah Fauzi
Indonesian Journal of Maritime Technology Vol. 4 No. 1 (2026): Volume 4 Issue 1, June 2026
Publisher : Naval Architecture Department, Kalimantan Institut of Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35718/ismatech.v4i1.8482100

Abstract

Asphalt Concrete-Wearing Course (AC-WC) is the surface layer of flexible pavement that directly receives traffic loads and protects the underlying layers from the effects of water and weather. The performance of AC-WC is strongly influenced by stability, Marshall flow, air voids, density, and resistance to water absorption. This study utilizes eggshell powder (ESP) as an alternative filler due to its high calcium carbonate content and its potential to fill voids between aggregate particles. The objectives of this study are to determine the optimum asphalt content, determine the optimum ESP content, and evaluate the effect of ESP variations on Marshall flow characteristics and water absorption of AC-WC mixtures. This research was conducted experimentally in the laboratory using ESP variations of 2%, 6%, and 10%. The tests included material characterization, aggregate gradation design, Marshall testing, determination of optimum asphalt content, and water absorption testing. The results show that the optimum asphalt content was 5.24%. The mixture with 6% ESP produced the most balanced performance, with a stability value of 2373.09 kg, Marshall flow of 3.53 mm, VIM of 4.51%, VMA of 20.20%, VFA of 77.67%, density of 2.36 g/cm³, MQ of 673.75 kg/mm, and the lowest water absorption of 0.495%. In terms of flow behavior, the 6% ESP mixture remained within the required specification range, indicating adequate flexibility without excessive deformation. In terms of water absorption, the 6% ESP mixture showed the best resistance to water ingress compared with the 2% and 10% ESP mixtures. The 2% ESP content was insufficient to produce a void structure that met the specifications, while the 10% ESP content tended to increase mixture stiffness and water absorption. Therefore, the use of 6% ESP has the potential to serve as an environmentally friendly alternative filler in AC-WC mixtures, particularly in improving the balance between Marshall flow characteristics and water absorption resistance.