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All Journal JOURNAL OF CIVIL ENGINEERING, BUILDING AND TRANSPORTATION Jurnal Rekayasa Teknik Sipil dan Lingkungan
Dinda Sekar Selni Prawardani
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Civil Engineering, Building, Construction & Architecture Computer Science & IT Environmental Science Materials Science & Nanotechnology Transportation

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EVALUATION OF AIRPORT RAIL SERVICES BASED ON MINIMUM SERVICE STANDARDS (SPM) Dinda Sekar Selni Prawardani; Imam Basuki
JOURNAL OF CIVIL ENGINEERING BUILDING AND TRANSPORTATION Vol. 8 No. 1 (2024): JCEBT MARET
Publisher : Universitas Medan Area

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31289/jcebt.v8i1.10526

Abstract

The Yogyakarta government's decision to construct the Yogyakarta International Airport (YIA) was prompted by the limited capacity of Adisutjipto Airport, which could only accommodate 1.2 million passengers. In reality, the number of passengers exceeded five times its capacity due to congested flight schedules and inadequate airport facilities. Since 2020, flights have been redirected to YIA, as stated on the official Adisutjipto Airport website. The airport's distant location from the city center influenced the development of mass transportation, particularly the direct rail connection between YIA and Yogyakarta city center. The YIA Airport Train Station began operations in October 2021, prompting the need for an evaluation of service facilities within the train and at the YIA Airport Station. This study aims to assess the extent to which services within the Airport Train and the YIA Airport Station meet minimum service standards and to innovate scheduling to improve passenger satisfaction. The Government has established the Minimum Service Standards for People Transportation by Train, covering safety, security, reliability, comfort, convenience, and equality. Evaluation is conducted through qualitative methods, including direct observation and an online questionnaire for primary data collection. The evaluation results indicate that several service facilities do not meet standards, such as the absence of toilets and prayer rooms in the station, a shortage of seating in waiting areas, inappropriate temperatures inside the train, and the need for additional departure schedules aligned with flights. The questionnaire reflects passengers' expectations for improved facilities and scheduling. This study proposes enhancements to facilities and train scheduling as steps toward improving service quality in the Airport Train and YIA Airport Station.
THE EFFECT OF SEAWATER SOAKING ON THE STABILITY CHARACTERISTICS OF ASPHALT CONCRETE MIXTURES IN THE COASTAL REGION OF PAPUA: PENGARUH RENDAMAN AIR LAUT TERHADAP KARAKTERISTIK STABILITAS CAMPURAN BETON ASPAL DI WILAYAH PESISIR PAPUA Dinda Sekar Selni Prawardani
Jurnal Rekayasa Teknik Sipil dan Lingkungan - CENTECH Vol. 6 No. 2 (2025): Vol. 6 No. 2 (2025): Jurnal Rekayasa Teknik Sipil dan Lingkungan, OKTOBER 2025,
Publisher : UKI Press

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Abstract

This research analyzes the effect of seawater immersion on the performance of asphalt concrete mixtures, using the "Retained Strength Index" as the primary parameter. The background for this research stems from the real-world condition of roads in coastal areas that are frequently submerged in seawater. Seawater, with its salt content, is a factor that can significantly reduce the durability and service life of pavement layers. The objective of this study is to examine the characteristics of asphalt concrete mixtures after exposure to varying durations of seawater immersion and to compare the results with those of freshwater immersion to observe the differences. The research methodology involves a Marshall Test on mixture samples prepared with an optimum asphalt content. The immersion durations applied were 0, 6, 12, 24, and 48 hours, in both seawater and freshwater media. The parameters comprehensively analyzed include Stability, Flow, Density, Marshall Quotient, and the Retained Strength Index. The test results consistently show that the longer the immersion duration, the more the values for stability, flow, and MQ tend to decrease. Specifically, seawater immersion causes a greater reduction in performance compared to freshwater. This decrease in performance is attributed to the salt (NaCl) content in seawater, which gradually erodes the adhesive bond between the asphalt and the aggregates, thereby reducing the overall cohesion of the mixture. Although the RSI value decreases with longer immersion times, the results show that even after 48 hours of immersion, the mixture still meets the minimum specification limit of the 2018 Bina Marga standard, which is 90%. In conclusion, it can be stated that seawater significantly affects the reduction in the strength of asphalt mixtures.   
Co-Authors Imam Basuki