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Journal : Scripta Technica: Journal of Engineering and Applied Technology

Analisis Asphalt Concrete Wearing Course (AC-WC) dengan Penambahan Lateks dan Abu Sekam Padi pada Perkerasan Jalan Prabowo Pujito; Zida Shofwan Azhim; Eko Muliawan Satrio
Journal of Engineering and Applied Technology Vol 2 No 1 (2026): : June: Scripta Technica: Journal of Engineering and Applied Technology
Publisher : CV SCRIPTA INTELEKTUAL MANDIRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.65310/eamtj865

Abstract

Asphalt Concrete Wearing Course (AC-WC) is a wearing layer on flexible pavements that directly receives traffic loads and environmental influences. However, conventional mixtures are still susceptible to plastic deformation, fatigue cracking, and water damage, so material modification is needed to improve their performance. This study aims to analyze the effect of adding latex and rice husk ash on the Marshall characteristics of AC-WC and to determine the optimal mixture variation. Laboratory experimental methods were used with 60/70 penetration asphalt, aggregates in accordance with the 2025 General Specifications for Highways, latex as an additive, and rice husk ash as a filler, with variations of 0%, 4%, 7%, and 9% latex and 0%, 3%, 6%, and 7% rice husk ash. Marshall test results showed that the combination of materials significantly affected the stability, flow, and stiffness of the mixture, while still meeting Bina Marga technical requirements. The best mixture was obtained with 3% latex and 6% rice husk ash, with VIM 4.82%, VMA 21.63%, VFB 78.01%, stability 831.17 kg, flow 3.73 mm, and MQ 222.33 kg/mm, making this variation recommended as the optimal and environmentally friendly AC-WC mixture.    
Evaluasi Kinerja K3 Pada Proyek Pembangunan Gedung Ibrahim Tower Tahap 1 Rumah Sakit Roemani Muhammadiyah Semarang Alan Adi Nugroho; Eko Muliawan satrio
Journal of Engineering and Applied Technology Vol 2 No 1 (2026): : June: Scripta Technica: Journal of Engineering and Applied Technology
Publisher : CV SCRIPTA INTELEKTUAL MANDIRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.65310/f8ca6d09

Abstract

This study evaluates Occupational Health and Safety (OHS) performance in the Ibrahim Tower Phase 1 Construction Project at Roemani Muhammadiyah Hospital, Semarang, using a field-based empirical quantitative descriptive-evaluative approach. The research integrates hazard identification, frequency rate measurement, and assessment of preventive implementation to determine overall safety performance. From 203 identified potential hazards within the project’s SMK3 documentation, 39 were verified as actual occurrences, representing 19.21 percent of the total identified hazards. Frequency Rate calculations based on 985,600 working hours indicate that all actual hazard variables fall within the low-risk category (FR ≤ 5), demonstrating controlled accident intensity. Questionnaire analysis involving managerial and operational personnel reveals good to very good levels of preventive implementation, supporting the low frequency findings. The integration of documented safety systems, empirical verification, quantitative risk measurement, and organizational commitment suggests that the project’s OHS management system functions effectively.