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All Journal Inventa: Journal of Science, Technology, and Innovation
Buyung Mantap
Universitas Ratu Samban
Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Mechanical Engineering

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Analisis Kelayakan Ekonomi dan Teknis Proyek Pembangunan Jalan Tol Segmen Central Business District Menggunakan Metode Value Engineering Buyung Mantap; Frando Heriss Mamuri
Journal of Science, Technology, and Innovation Vol 2 No 1 (2026): : August: Inventa: Journal of Science, Technology, and Innovation
Publisher : CV SCRIPTA INTELEKTUAL MANDIRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.65310/tg30gm84

Abstract

The imbalance between increasing vehicle volumes and road infrastructure development has triggered congestion escalation in urban central business areas. This study aims to evaluate the economic and technical feasibility of a 12.5-kilometer toll road development project and optimize construction costs through a Value Engineering approach. The analysis was conducted using the Net Present Value (NPV), Internal Rate of Return (IRR), Benefit-Cost Ratio (BCR), and Payback Period indicators with a 30-year investment period. The initial analysis indicates that the project is financially feasible, with an NPV of IDR 450.2 billion, an IRR of 12.4%, and a BCR of 1.28. The implementation of Value Engineering through precast system optimization and material substitution resulted in construction cost savings of 14.2% or IDR 185 billion. After optimization, the NPV increased to IDR 635.7 billion, the IRR improved to 14.1%, the BCR reached 1.45, and the Payback Period was reduced to 11.8 years. The integration of economic evaluation and value engineering provides a more efficient and sustainable toll road development strategy. This approach can serve as a basis for urban infrastructure investment decision-making by considering technical, economic, and long-term risk aspects.
Analisis Karakteristik Tanah Melalui Penyelidikan Tanah (Soil Investigation) Sebagai Dasar Perencanaan Pondasi Bangunan Gedung Buyung Mantap; Rendi Zoeyantara
Journal of Science, Technology, and Innovation Vol 2 No 1 (2026): : August: Inventa: Journal of Science, Technology, and Innovation
Publisher : CV SCRIPTA INTELEKTUAL MANDIRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.65310/bv06yv13

Abstract

Soil investigation is an essential stage in construction planning because soil characteristics influence the safety and stability of building foundation systems. This study aims to analyze soil characteristics through soil investigation activities as a basis for determining appropriate foundation types for building structures. The research method used was descriptive quantitative through field investigation and laboratory testing. Data were obtained through soil boring, Standard Penetration Test (SPT), soil sampling, and laboratory tests including water content, specific gravity, Atterberg limits, shear strength, and consolidation tests. The results indicate variations in soil characteristics based on depth, density values, mechanical parameters, and soil bearing capacity, which serve as the basis for foundation system evaluation. This study confirms that accurate soil investigation data can improve foundation design reliability, reduce the risk of construction failure, and support efficient building planning. An integrated approach combining field testing and laboratory analysis provides a more comprehensive understanding of soil behavior as a structural supporting medium.
Analisis Perbandingan Biaya dan Waktu Konstruksi Struktur Bangunan Menggunakan Sistem Beton Bertulang dan Baja Ringan Eygen Rapendes; Buyung Mantap
Journal of Science, Technology, and Innovation Vol 2 No 1 (2026): : August: Inventa: Journal of Science, Technology, and Innovation
Publisher : CV SCRIPTA INTELEKTUAL MANDIRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.65310/ns7k4b52

Abstract

The selection of a structural system is an important factor in determining the success of construction projects, particularly in terms of cost efficiency and implementation time. Reinforced concrete remains a widely used conventional method due to its high structural durability, while lightweight steel has emerged as an alternative construction system with practical characteristics and faster installation processes. This study aims to compare the construction costs and implementation time between reinforced concrete and lightweight steel systems for a two-story residential building in Bengkulu. The research employed an empirical comparative study through identical building modeling, work volume calculations, unit price analysis based on SNI standards, and construction duration estimation. The results indicate that lightweight steel provides lower construction costs and shorter implementation time compared with reinforced concrete. Lightweight steel is recommended for projects prioritizing time and resource efficiency, while reinforced concrete remains a suitable option for buildings requiring higher structural durability.  
Perencanaan Pembangunan SD Negeri 142 Seluma Kecamatan Ulu Talo Kabupaten Seluma dalam Program Revitalisasi Satuan Pendidik Tahun 2026 Hengki Saputra; Buyung Mantap
Journal of Science, Technology, and Innovation Vol 2 No 1 (2026): : August: Inventa: Journal of Science, Technology, and Innovation
Publisher : CV SCRIPTA INTELEKTUAL MANDIRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.65310/em43pr84

Abstract

The School Revitalization Program is a strategic government initiative aimed at improving the quality of educational facilities and infrastructure by providing safe, adequate, and standards-compliant school buildings. This study aims to develop the technical planning for the construction of SD Negeri 142 Seluma under the 2026 School Revitalization Program. The study employed a qualitative descriptive approach through field research, including interviews, building condition surveys, dimensional measurements, damage assessment based on the PUPR Building Damage Assessment Form, and technical document analysis. The results indicate that the school received five revitalization components: rehabilitation of three classrooms, rehabilitation of the library, construction of a new administration (ADM) building, construction of a school health unit (UKS), and development of an assembly field. The assessed building damage was classified as moderate, with damage levels ranging from 33.38% to 41.99%. The planning process produced detailed engineering drawings, technical specifications, and a cost estimate totaling IDR 1,141,000,000. The resulting technical planning provides a reliable basis for self-managed construction implementation while supporting improvements in the quality of educational services.
Analisis Mutu dan Kinerja Bangunan Penahan Ombak di Kawasan Pantai Panjang Provinsi Bengkulu Cok Da Gibson; Buyung Mantap
Journal of Science, Technology, and Innovation Vol 2 No 1 (2026): : August: Inventa: Journal of Science, Technology, and Innovation
Publisher : CV SCRIPTA INTELEKTUAL MANDIRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.65310/8qf2y733

Abstract

Pantai Panjang in Bengkulu Province is a strategic coastal area that supports tourism, local economic activities, and environmental protection but is highly vulnerable to wave attack and coastal erosion due to its direct exposure to the Indian Ocean. This study aims to evaluate the construction quality and performance of rubble mound breakwaters in reducing wave energy and controlling shoreline erosion. An empirical descriptive approach was employed through field observations, measurements at six observation points, drone documentation, interviews, and secondary data analysis. Construction quality was assessed based on material suitability, structural geometry, and damage level, while performance evaluation focused on wave attenuation, abrasion reduction, and overtopping occurrence. The results indicate that most breakwater segments remain in good condition, with an average wave transmission coefficient of 0.32 and approximately 63% reduction in shoreline erosion. Lower performance was identified at locations with inadequate material dimensions and reduced crest elevation. The findings emphasize the importance of regular maintenance and periodic performance evaluation to sustain the long-term effectiveness of coastal protection structures.
Analisis Perbandingan Teknis dan Ekonomi Rekayasa Perkerasan Lentur dengan Perkerasan Kaku pada Proyek Jalan Raya Nugraha Ahmad Santorini; Buyung Mantap
Journal of Science, Technology, and Innovation Vol 2 No 1 (2026): : August: Inventa: Journal of Science, Technology, and Innovation
Publisher : CV SCRIPTA INTELEKTUAL MANDIRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.65310/5e94rz33

Abstract

The selection of pavement type is a strategic decision in highway planning because it directly influences structural performance and cost efficiency throughout the service life. This study aims to compare the technical and economic performance of flexible and rigid pavements using a quantitative comparative simulation approach. The simulation was conducted on a 5 km arterial road with a subgrade California Bearing Ratio (CBR) of 5%, an annual traffic growth rate of 4.5%, and a 20-year design life. Pavement design was developed based on the 2017 Manual Desain Perkerasan Jalan (MDPJ), while the economic evaluation employed the Life Cycle Cost Analysis (LCCA) method with an 8% discount rate. The results indicate that flexible pavement requires a multilayer structure with a total thickness of approximately 50 cm, whereas rigid pavement utilizes a 25 cm concrete slab. Although the initial construction cost of flexible pavement (IDR 18.50 billion) is lower than that of rigid pavement (IDR 24.20 billion), the total life cycle cost of rigid pavement (IDR 22.47 billion) is lower than that of flexible pavement (IDR 24.72 billion). These findings demonstrate that rigid pavement is a more cost-effective alternative for heavily trafficked roads when evaluated from a life cycle cost perspective.  
Co-Authors Cok Da Gibson Eygen Rapendes Frando Heriss Mamuri Hengki Saputra Nugraha Ahmad Santorini Rendi Zoeyantara