https://www.astm.org/membership-participation/technical-committees/workitems/workitem-wk93607
WK93607 - Revision of C618-23e1 Standard Specification for Coal Ash and Raw or Calcined Natural...
ASTM International - Standards Worldwide
https://store.astm.org/c0618-02.html
C618 Standard Specification for Coal Fly Ash and Raw or Calcined Natural Pozzolan for Use as a...
https://www.scirp.org/reference/ReferencesPapers?ReferenceID=2236557
ASTM Standard C618 (2017) Specification for Coal Fly Ash and Raw or Calcined Natural Pozzolan for...
ASTM Standard C618 (2017) Specification for Coal Fly Ash and Raw or Calcined Natural Pozzolan for Use in Concrete. ASTM International, West Conshohocken, PA.