🧱 Plastic Bricks (HDPE/LDPE + Sand + Kaolin)
Melted plastic mixed with sand and kaolin clay produces bricks with lower water absorption and adequate compressive strength.
Key Details
- HDPE/LDPE are shredded and melted at ~180-220 C.
- Sand:plastic ratio is typically 70:30.
- Bricks are lighter and cheaper than clay bricks.
- Reuse prevents plastic from entering landfills.
- Concern: fumes during melting require safe ventilation.
💡 Lesson LearnedLow-tech plastic-to-brick conversion is viable at community scale.