| abstract |
The present invention generally relates to a method of producing plastic aggregate and its use for the production of concrete products. The aggregate is formed by providing granulated waste plastic material, introducing the granulated waste plastic material into an extruder having a die having a ratio of die opening area to die working belt area of about 1:10 to about 1:40, and extruding the granular waste plastic material through an extruder to produce extruded plastic aggregate. The process may include the presence of controlled cooling, adding additives and treating the surface of the aggregate to produce the desired aggregate that can be used to prepare a concrete product with desired properties such as compressive strength and weight. |