Abstract:
Disposal of plastics and other solid wastes has been a major problem in Kenya. Most of these wastes can be
recycled through various ways and methods to produce new products. Plastics can be combined with sawdust to
develop composite materials for applications such as in building. In this project, a wood-plastic composite
(WPC) was developed from sawdust and plastic solid wastes.
The composite bore the advantages of both wood and plastics which can be applied in various sectors including
interior design work and in automotive among others, thereby curbing the problem of garbage accumulation in
the environment. The project provides eco-friendly solutions by making best use of the available resources
(wood and plastic resins) thus, finding sustainable solutions to the problem of limited waste dumping sites and
deforestation in the country. The composites were made from PP and HDPE thermoplastics and mahogany
sawdust obtained from our wood workshop in Dedan Kimathi University. From the tests carried out and results
obtained, it was found that, the composite has more advantages than the individual constituent materials.
Water absorption test revealed that all the samples took up water though not as much pronounced as for plain
sawdust. Additionally, the rate of water reduction was found to be excellent. They took less time to release the
absorbed water to the environment meaning that they can be applied in humid or wet environ. The composite
samples were easy to machine since they were easily shaped using a handsaw.
