**5. Conclusion**

The concept of employing composite brick and pavement was investigated in this research. PET materials melted during the pyrolysis process due to their low melting point of 250°C. This research brought about the purpose of eco-friendly construction material production in the drive toward achieving sustainable development in the fourth industrial revolution. It enlightens on the concept of eco-friendly road construction by use of flexible pavements and bricks by utilizing waste, non-biodegradable PET plastic. The properties of plastic meant it would not be affected by water absorption which weakens the bricks and flexible pavements. Further research can be done on exploiting the properties of PET in the manufacture of construction materials, especially its light weight and temperature regulation. As a reference for future work the residue char from pyrolysis can be further investigated for use as an activated carbon.
