The construction industry is dynamic due the advancement in technology, budget constraint and development process. Plastic pollution poses a challenge to the ever-growing population since it was produced in high quantities.

The membrane bioreactor (MBR) is a new technology in wastewater treatment that is increasingly gaining popularity and application around the world due to its numerous advantages over conventional biological treatment (Stephenson, Simon, Jefferson & Brindle, 2001). It comprises of a suspended growth-activated sludge biological treatment followed by membrane filtration for liquid / solid separation. The need for processes like sedimentation and disinfection used in conventional processes is eliminated through the MBR systems.

Research into the building materials has been in high gear due to high cost of constructions and low variety of versatile materials. Increased flooding in the city of Nairobi during the rainy season has been a major headache to the residents of Nairobi. Nairobi news listed NHC Nairobi West Estate, Imara Daima, South C, Near Clay Works along Thika Road, Nyayo High Rise Estate in Mbagathi and Kileleshwa as the top six flood prone areas in Nairobi (Musambi, 2015).