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All Journal Asian Journal of Science, Technology, Engineering, and Art Mikailalsys Journal of Advanced Engineering International
Ndzessou, Westinevy Benarez
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Arts Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Electrical & Electronics Engineering Engineering Mechanical Engineering Social Sciences

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Valorization of Plastic Waste in the Manufacture of Paving Stones in Congo Republic: The Case of Polyethylene Terephthalates (PET) Berry, Ulrich; Motoula, Smäel Magloire Elombo; Samba, René Evrard Josué; Ndzessou, Westinevy Benarez
Asian Journal of Science, Technology, Engineering, and Art Vol 3 No 4 (2025): Asian Journal of Science, Technology, Engineering, and Art
Publisher : Darul Yasin Al Sys

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58578/ajstea.v3i4.7260

Abstract

This study aims to contribute to the valorization of plastic waste—one of the leading contributors to environmental pollution—by proposing a practical recycling approach that utilizes waste plastics as a binder in road surfacing materials. Specifically, the research investigates the use of thermoplastic waste, with a focus on polyethylene terephthalate (PET), collected from the streets of Brazzaville, in the production of eco-friendly paving blocks. These blocks are composed of a sand matrix and contain 53.33% recycled plastic by weight. The study employed an experimental methodology, with water absorption rate as the primary performance indicator. The results indicate a consistently low water absorption rate across samples, regardless of variations in plastic content, suggesting a stable and durable material performance. These findings highlight the potential of recycled plastic-based paving blocks as a sustainable alternative for road surfacing, contributing to both waste reduction and infrastructure development.
Physical Properties of Petroleum Products Marketed in Congo Berry, Ulrich; Motoula, Smäel Magloire Elombo; Ndzessou, Westinevy Benarez
Mikailalsys Journal of Advanced Engineering International Vol 3 No 1 (2026): Mikailalsys Journal of Advanced Engineering International
Publisher : Darul Yasin Al Sys

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58578/mjaei.v3i1.8355

Abstract

The use of fuels and combustibles in internal combustion engines requires strict quality standards to ensure operational efficiency and to limit the environmental impact of emissions. This study focuses on the characterization of the physical properties of petroleum products marketed in Congo, with particular attention to parameters that are critical for proper engine functioning and environmental performance. To achieve this objective, a series of laboratory analyses was conducted on petroleum product samples to determine mass density, specific gravity, color, pH, and viscosity. These measurements were obtained using a controlled experimental setup that included a precision balance, test tube, stopwatch, and an aluminum-ball arrangement for viscosity determination. The characterization carried out provides a coherent description of the physical quality of the petroleum products examined and illustrates how essential fuel properties can be systematically monitored through relatively simple but rigorous testing procedures. The study concludes that careful control of these physical parameters is fundamental to ensuring that petroleum products meet the standards required for safe, efficient engine operation and for reducing the potential contribution of inadequate fuel quality to environmental pollution, thereby underscoring the importance of strengthening quality control practices in the fuel supply chain.
Co-Authors Berry, Ulrich Motoula, Smäel Magloire Elombo Samba, René Evrard Josué