Aggregates

Aggregates are usually classified on the basis of their size:

• Coarse aggregate (>4 mm) (e.g. gravel)
• Fine aggregate (<4 mm) (e.g. sand)
• Filler (<0,063 mm)

Other classifications can be added on the basis of their mineralogical composition:

• Calcareous
• Quartziticor on the basis of their origin:
  Natural (usually with smooth shape)
  Crushed (usually with angular shape)