Historical
ASTM C618-12a
Standard Specification for Coal Fly Ash and Raw or Calcined Natural Pozzolan for Use in Concrete
1.1 This specification covers coal fly ash and raw or calcined natural pozzolan for use in concrete where cementitious or pozzolanic action, or both, is desired, or where other properties normally attributed to fly ash or pozzolans may be desired, or where both objectives are to be achieved.
ASTM International [astm]