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2. American Association of State Highway Transportation Officials, AASHTO, 2005. Standard Specification for Coal Fly Ash and Raw or Calcined Natural Pozzolan for Use as a Mineral Admixture in Concrete, Designation M 295-05, Washington, DC, USA.
3. American Coal Ash Association, ACAA, 2001. CCP Survey, retrieved from .
4. American Coal Ash Association, ACAA, 2005. CCP Survey, retrieved from .
5. American Society for Testing and Materials, ASTM, 2003. Standard Specification for Coal Fly Ash and Raw or Calcined Natural Pozzolan for Use as a Mineral Admixture in Concrete, Designation C 618-03, Philadelphia, PA., USA.