Plastic recycling for construction
High performance, lightweight aggregate for concrete from the recycling of urban waste - NUMIX
The amount of plastics sent for incineration or landfill within the EU is on the rise. At the same time there is an ever-increasing need for aggregate for mortar and lightweight concrete. A study conducted in the Italian market alone found 400 000 tons of aggregate a year, destined for lightweight concrete, was being produced.
NUMIX set out to develop two products from recycled plastics: a polymeric foam to replace expanded clay as a base for lightweight concrete, and homogenous flakes to be used as aggregate for mortar and as raw material for the expanded granules.
The project successfully produced a recycled plastics replacement for expanded clay and by the end of project, about 6 000 tons of plastic waste was recovered. By using a plastics based lightweight aggregate instead of expanded clay, the project reduced water consumption to 10% from 15%.