Analysis of Water Absorption in the Utilization of Plastic Waste as a Mixed Material for Making Environmentally Friendly Paving Blocks

Tampubolon, Sudarno P and Munthe, Deviana Pratiwi and Pane, Medyawanti and Panjaitan, Bintang Sri Rejeki and Prasetyo, Antonius Doddy Tyas (2026) Analysis of Water Absorption in the Utilization of Plastic Waste as a Mixed Material for Making Environmentally Friendly Paving Blocks. Formosa Journal of Applied Sciences (FJAS), 5 (3). pp. 871-884. ISSN 2962-6447

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Abstract

Paving blocks with a mixture of plastic waste have lower water absorption (2–6%) than conventional paving (8–12%), due to the hydrophobic nature of plastics and more porous structure conventional paving. This study aims to analyze the absorption of paving blocks and the use of PET (Polyethylene Terephthalate) plastic waste as a mixture of making environmentally friendly paving blocks. This research uses literature and experimental study methods through the manufacture of plastic shredders, sample testing in the laboratory, mix design planning, casting, testing, and data analysis. The test was carried out by adding 5% of PET plastic waste with a size of 0.1-2 cm with a soaking time of 48 hours able to produce a water infiltration value on the paving block between 4.3-6.4% with an average water infiltration value of 5.2%, with compressive strength between 20 and 32 MPa in concrete quality B, which can be used for roads with medium loads.

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