Production and Processes
Aggregates are inert material
- Primary aggregates are produced from natural sources extracted from quarries and sand & gravel pits and in some countries from sea-dredged materials (marine aggregates).
- Secondary aggregates are recycled aggregates derive from reprocessing materials previously used in construction, including construction, demolition residues and by-products from other industrial processes, like blast or electric furnace slags or china clay residues.