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Incinerator bottom ash (IBA) is a form of ash produced in incineration facilities. This material is discharged from the moving grate of municipal solid waste incinerators. Following combustion the ash typically has a small amount of ferrous metals contained within it. This ash can be processed to standardise the material and remove contaminants in order for it to be used as an aggregate. Following processing the material can be termed IBA aggregate or processed IBA. The aggregate uses for the material include:
- Bulk fill
- Asphalt
- Cement bound materials
- Lightweight blocks
- Pavement concrete
Alternatively if there are no local markets for the IBA the material is typically disposed of in a landfill.
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