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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.
Analisis Kepuasan Masyarakat Terhadap Sistem Drainase Loi, Anggerius; Hia, Tafianus; Harefa, Andrew Christover; Daeli, Serta Denius
Jurnal Ilmu Ekonomi, Pendidikan dan Teknik Vol. 3 No. 2 (2026): IDENTIK - Maret
Publisher : CV. SINAR HOWUHOWU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70134/identik.v3i2.1362

Abstract

This study aims to analyze the level of community satisfaction with the drainage system in Gunungsitoli and to identify the factors influencing it. The research employs a quantitative approach with a descriptive method by distributing questionnaires to residents living in areas affected by the drainage system. Satisfaction measurement is conducted using a Likert scale based on five service quality dimensions: tangible, reliability, responsiveness, assurance, and empathy. The collected data are analyzed using descriptive statistics and the Community Satisfaction Index (CSI). The results indicate that the level of community satisfaction with the drainage system in Gunungsitoli falls into the moderately satisfied category. The assurance and tangible dimensions obtain relatively higher scores, while the reliability dimension is the lowest. The main problems identified include insufficient drainage capacity, poorly maintained drainage conditions, and blockages caused by waste. In addition, community participation is found to significantly influence the performance of the drainage system. The study concludes that improving community satisfaction with the drainage system requires an integrated approach combining technical improvements and increased public awareness. The local government needs to conduct routine maintenance, enhance drainage capacity, and promote community education on environmental cleanliness. This research is expected to serve as a reference for policy-making in more effective and sustainable urban drainage management.