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All Journal INERSIA Jurnal Ilmu Ekonomi, Pendidikan dan Teknik (IDENTIK) Innovative Research in Civil and Environmental Engineering (IRCEE)
Bimawijaya Laia
Public Works And Spatial Planning Office Gunungsitoli City
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PENGARUH KERAPATAN TANAH PASIR KALI OPAK PLERET YOGYAKARTA TERHADAP POTENSI LIKUIFAKSI BERDASARKAN UJI SHAKING TABLE Laia, Bimawijaya
JURNAL INERSIA Vol. 7 No. 1 (2015): Jurnal Inersia
Publisher : POLITEKNIK NEGERI SAMARINDA

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Likuifaksi adalah suatu peristiwa berubahnya sifat tanah dari keadaan padat menjadi keadaan cair, yang disebabkan oleh beban siklik pada saat gempa terjadi sehingga tekanan air pori meningkat melebihi tegangan efektif tanah. Likuifaksi umumnya terjadi di lapisan sedimen granular dengan tingkat kerapatan rendah. Pengaruh kerapatan relatif tanah terhadap mekanisme likuifaksi dapat diketahui dengan melakukan uji eksperimental menggunakan shaking table. Parameter yang digunakan untuk menentukan tanah yang mengalami likuifaksi adalah rasio peningkatan tegangan air pori (ru). Jika ru ≥ 1 maka likuifaksi dapat terjadi, sedangkan jika ru < 1 maka likuifaksi tidak dapat terjadi. Tanah pasir Kali Opak Pleret yang digunakan sebagai objek dalam penelitian memiliki kerapatan sebesar 24,35%. Hasil evaluasi uji shaking table menunjukkan bahwa potensi likuifaksi terbesar terjadi pada kerapatan relatif tanah 25% untuk percepatan gempa 0,4g dan terendah tercatat pada kerapatan relatif tanah 55% untuk percepatan gempa 0,3g. Penurunan muka tanah terbesar terjadi pada kerapatan relatif 25% yakni 4 cm dan terendah pada kerapatan 55% sebesar 0,53 cm. Pengujian ini menunjukkan bahwa pada tanah pasir Kali Opak Pleret dengan kerapatan relatif tanah 25% dan 35% berpotensi likuifaksi, dan pada kerapatan relatif tanah 45% dan 55% tidak berpotensi likuifaksi.
The Influence Of Using Sea Sand As Aggregate On The Compressive Strength Of Concrete Zebua, Dermawan; Harita, Hamedoni; Daeli, Serta Denius; Zalukhu, Muhammad Haris; Laia, Bimawijaya
Innovative Research in Civil and Environmental Engineering Vol. 1 No. 1 (2024): IRCEE - October
Publisher : CV. SINAR HOWUHOWU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70134/ircee.v1i1.41

Abstract

This study investigates the effect of using sea sand as fine aggregate on the compressive strength of concrete. The experimental research involved preparing concrete samples with varying proportions of sea sand, comparing their performance against conventional river sand. Compressive strength tests were conducted on the samples at 14 days, revealing that samples containing river sand exhibited significantly higher compressive strength than those with sea sand. The average compressive strength for concrete with 100% river sand was found to be 18.23 N/mm², while the presence of chlorides in sea sand, despite washing, adversely affected the strength. Statistical analysis confirmed a significant difference in strength between the control and sea sand mixtures. While sea sand presents an environmentally sustainable alternative, particularly in coastal regions, its use requires careful consideration of chloride content to prevent corrosion of steel reinforcement. This study concludes that sea sand can be a viable option for non-load-bearing or temporary structures, provided that appropriate measures are taken to mitigate potential risks.
Evaluasi Kualitas Pelayanan Transportasi Jalan Di Kabupaten Nias Berdasarkan Persepsi Masyarakat Dan Aspek Manajemen Lalu Lintas Laia, Bimawijaya; Zalukhu, Muhammad Haris; Daeli, Ikhtiar Aronifati
Jurnal Ilmu Ekonomi, Pendidikan dan Teknik Vol. 2 No. 5 (2025): IDENTIK - September
Publisher : CV. SINAR HOWUHOWU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70134/identik.v2i5.1339

Abstract

This study aims to evaluate the quality of road transportation services in Nias Regency based on community perceptions and to examine the implemented traffic management aspects. A descriptive approach was employed using survey methods and field observations without conducting road capacity calculations. Data were collected through questionnaires distributed to 100 respondents, including motorcyclists, car drivers, public transport drivers, and pedestrians, as well as interviews with relevant agencies. The findings indicate that the overall quality of road transportation services is categorized as moderate, with several indicators such as safety, street lighting, and the availability of traffic signs and markings considered suboptimal. Traffic management aspects, particularly parking control and the handling of accident-prone areas, also require improvement. This study highlights that perception-based evaluation provides a comprehensive understanding of road transportation service conditions and can serve as a foundation for policy formulation aimed at improving infrastructure quality and sustainable traffic management.
Co-Authors Dermawan Zebua Harita, Hamedoni Ikhtiar Aronifati Daeli Muhammad Haris Zalukhu Serta Denius Daeli