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All Journal Inersia : Jurnal Teknik Sipil dan Arsitektur TAPAK (Teknologi Aplikasi Konstruksi) : Jurnal Program Studi Teknik Sipil Jurnal Kridatama Sains dan Teknologi Jurnal Forum Teknik Sipil
Lau, Debora
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Agriculture, Biological Sciences & Forestry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Education Engineering Materials Science & Nanotechnology Mechanical Engineering Social Sciences Transportation

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Bridge Assessment Analysis using Sufficiency Rating Method (Case Study of The Mungkung Overpass) Lau, Debora; Aminullah, Akhmad; Triwiyono, Andreas
INERSIA lnformasi dan Ekspose Hasil Riset Teknik Sipil dan Arsitektur Vol. 20 No. 1 (2024): May
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/inersia.v20i1.71348

Abstract

Bridges play a crucial role in connecting various routes and water bodies, necessitating regular monitoring to prevent potential hazards and losses due to deterioration. In Indonesia employs the Bridge Management System (BMS) for decision-making regarding maintenance, repair, and replacement activities, its reliance on a limited set of criteria may lead to uncertainties in bridge condition assessmsents. This study explores the Sufficiency Rating (SR) method as an alternative for assessing bridge feasibility. By considering multiple factors, including structural adequacy, serviceability, functionality, and public interest, the SR method offers a comprehensive approach to bridge evaluation. An analysis of the Mungkung Overpass on the Ngawi Kertasono toll road was conducted to evaluate the effectiveness of the SR method. The findings classified the bridge as excellent, indicating no immediate need for treatment. However, the SR method has limitations, particularly in visually assessing damage to superstructure and substructure elements, which may introduce subjectivity. Overall, this research contributes to the ongoing development of bridge assessment methodologies in Indonesia, aiming to enhance decision-making processes and ensure the safety and longevity of bridge infrastructure. After analyzing the data obtained through the implementation of the SR method, it was revealed that S1 achieved a value of 45%, S2 achieved 23%, S3 achieved 12.7%, and S4 achieved 6%. The total actual value of the four parameters calculated based on the SR method was 74.7%, with a difference of 25.3% from the maximum value. These findings clearly illustrated that the bridge satisfied the criteria for deficiency, thereby necessitating comprehensive rehabilitation measures to be undertaken.
Dampak Kerusakan Jalan Terhadap Lalu Lintas Pada Ruas Jalan Timor Raya KM 28, Kupang Adoe, Putri Angelia; Bolla, Margareth Evelyn; Nasjono, Judi K; Lau, Debora; Amalo, Patricia Sonia
JURNAL FORUM TEKNIK SIPIL (J-ForTekS) Vol 5 No 2 (2025): Volume 5 No. 2 September 2025
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/forteks.v5i1.22831

Abstract

The road is an important land transportation infrastructure, so a good pavement design is a must because poor road conditions can affect traffic performance. This study aims to determine the impact of road damage on traffic on the Timor Raya road segment Km 28, Oesao, Kupang Regency. Road damage analysis was conducted using the PCI method on three road segments, and traffic analysis used the PKJI 2023 method. The research results show the of road damage in segment I: 69.1 (Fair), segment II: 86,2 (Good), and segment III: 94,1 (Good). Vehicle volume during peak hours was segment I: 1641.4 smp/jam, segment II: 1510.4 smp/jam, and segment III: 1076.3 smp/jam. Side friction during peak hours was segment I: 975.6 kej/jam, segment II: 591.4 kej/jam, and segment III: 1056.4 kej/jam. Vehicle speed on a good road was segment I: 46 km/jam, segment II: 44 km/ jam, and segment III: 45 km/ jam. Vehicle speed on a damaged road was segment I: 37 km/ jam, segment II: 36 km/ jam, and segment III: 44 km/ jam. The impact on traffic is that it can cause congestion at points of damage and affect vehicle speed.
Analisis Kepadatan Tanah Timbunan untuk Jalan Akses Proyek (Studi Kasus: Kabupaten Siak) Wijaya, Miguel Felix; Lau, Debora; Ridwan, Alfadhella; Zikri, Nikmatul Fuadiz; Khairunas, Khairunas
JURNAL FORUM TEKNIK SIPIL (J-ForTekS) Vol 5 No 2 (2025): Volume 5 No. 2 September 2025
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/forteks.v5i2.24973

Abstract

Pembangunan infrastruktur jalan yang berkualitas menjadi aspek penting dalam pengembangan suatu wilayah karena menunjang mobilitas dan pertumbuhan ekonomi. Tanah yang menjadi subgrade (tanah dasar) pada jalan harus memenuhi standar kepadatan yang ditetapkan berdasarkan SNI 2828:2011. Penelitian ini bertujuan untuk menganalisis kepadatan tanah timbunan yang digunakan untuk subgrade pada jalan akses menuju proyek. Metode yang digunakan meliputi pengujian kepadatan tanah dengan alat sandcone untuk menentukan kepadatan kering merujuk pada SNI 2828:2011 dan pengujian kandungan air dalam tanah menggunakan alat speedy moisture tester merujuk pada SNI 03-1965.1-2000. Hasil pengujian menunjukkan bahwa semua titik uji memenuhi persyaratan minimal 95% dengan tingkat kepadatan rata-rata sebesar 96,23% atau berat volume kering maksimum sebesar 1,84 gr/cm3 dan kadar air optimum sebesar 10,74%. Oleh karena itu, subgrade pada jalan akses menuju proyek sudah sesuai spesifikasi sehingga dapat dilakukan tahapan pekerjaan selanjutnya.
Integrasi Green–Blue Infrastructure untuk Ketahanan Iklim dan Air di Nusa Tenggara Timur: Sebuah Systematic Literature Review dari Perspektif Semi-Arid Urban Systems Bara, Alvin Alfredo; Cornelis, Remigildus; Lau, Debora
Jurnal Kridatama Sains dan Teknologi Vol 7 No 02 (2025): Jurnal Kridatama Sains dan Teknologi
Publisher : Universitas Ma'arif Nahdlatul Ulama Kebumen

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53863/kst.v7i02.1902

Abstract

The semi-arid region of East Nusa Tenggara (NTT) faces increasing environmental pressures, including prolonged droughts, rising surface temperatures, and rapid runoff during short, intense rainfall events. These conditions necessitate nature-based solutions to restore hydrological balance and strengthen climate resilience. This study aims to identify the effectiveness of Green Infrastructure (GI) and Blue Infrastructure (BI) in addressing water scarcity and urban heat challenges, and to formulate an integrated GI–BI model that is adaptive to the socio-ecological conditions of NTT. A Systematic Literature Review (SLR) was conducted following PRISMA guidelines by examining nine recent international publications on GI–BI performance in semi-arid regions. Synthesis of the nine studies indicates that combinations of GI elements (bio-retention, green roofs, vegetated spaces, street trees) and BI components (retention ponds, natural channels, micro-reservoirs) consistently contribute to restoring 82–90% of pre-development water balance, reducing runoff by 35–45%, and lowering air temperatures by 3–5°C, depending on spatial configuration and local climatic variability. Key barriers to implementation include limited financing, weak cross-sectoral coordination, and insufficient long-term performance data. These findings underscore that GI–BI functions not only as technical interventions but also as critical policy instruments for adaptive spatial planning, green financing frameworks, and remote-sensing–based environmental monitoring in NTT. The study highlights the urgency of developing an integrated long-term implementation framework to ensure the sustainability of GI–BI adoption in enhancing regional climate resilience
REVIEW PENGARUH JENIS ALKALI AKTIVATOR TERHADAP SIFAT BETON GEOPOLIMER Wulandary, Irvebry Ayu; Apriliana, Estu Ema; Palsamu, Andantino Putra; Lau, Debora
TAPAK [Teknologi Aplikasi Konstruksi] : Jurnal Program Studi Teknik Sipil Vol 15, No 1 (2025): November 2025
Publisher : Prodi Teknik Sipil Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/tp.v15i1.4766

Abstract

Paper ini meninjau pengaruh jenis aktivator alkali terhadap sifat mekanik dan durabilitas beton geopolimer. Material ini dikembangkan sebagai alternatif ramah lingkungan pengganti semen Portland dengan memanfaatkan sumber aluminosilikat seperti abu terbang dan slag yang diaktivasi oleh larutan alkali. Aktivator yang umum digunakan meliputi NaOH, KOH, serta kombinasi dengan natrium atau kalium silikat. Hasil kajian dari berbagai penelitian menunjukkan bahwa jenis dan konsentrasi aktivator sangat memengaruhi reaksi geopolisasi dan pembentukan gel N–A–S–H maupun C–A–S–H. Kombinasi NaOH dan Na₂SiO₃ dengan rasio optimal menghasilkan kekuatan tekan dan ketahanan kimia lebih tinggi, sedangkan rasio silikat/hidroksida berlebih menurunkan workability dan stabilitas mikrostruktur. Tantangan utama meliputi sifat korosif aktivator, variasi bahan baku, dan belum adanya standar formulasi yang baku. Secara keseluruhan, pemilihan jenis aktivator yang tepat berperan penting dalam meningkatkan kinerja dan keberlanjutan beton geopolimer, sekaligus membuka peluang penerapan luas pada konstruksi hijau masa depan
Co-Authors Adoe, Putri Angelia Amalo, Patricia Sonia Aminullah, Akhmad Andreas Triwiyono Apriliana, Estu Ema Bara, Alvin Alfredo Khairunas Khairunas Margareth E. Bolla Nasjono, Judi K Palsamu, Andantino Putra Remigildus Cornelis Ridwan, Alfadhella Wijaya, Miguel Felix Wulandary, Irvebry Ayu Zikri, Nikmatul Fuadiz