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Specs and DOT Approvals

Working with Agencies and Associations In a Changing Industry

A Sustainable Solution

Fly ash is used as a supplementary cementitious material (SCM) in concrete to help improve the strength, durability, and sustainability of concrete; improve workability, pumpability, and watertightness; reduce heat of hydration and segregation and drying shrinkage; and mitigate alkali-silica reactivity (ASR), a reaction that causes concrete to crack and deteriorate.


Fly ash is classified as a Pozzolan: a mineral admixture and a supplementary cementitious material that provides concrete with performance benefits such as water tightness and long-term durability.

Volcanic ash, similar to today’s fly ash in its chemistry, had been used as a supplementary cementitious material in concrete dating back to the Roman Empire. This natural Pozzolan was used in structures that have lasted for thousands of years.

Recent Activity in Specifications


The Standard Specification for Coal Ash and Raw or Calcined Natural Pozzolan for Use in Concrete has been revised to include harvested coal ash and bottom ash. This revision includes replacing the word "coal fly ash" with "coal ash."


The American Association of State Highway and Transportation Officials’ Standard Specification for Coal Fly ash and Raw or Calcined Natural Pozzolan for Use in Concrete. This standard is being reviewed for harmonization with ASTM C618.

SEFA meets ASTM C618 and AASHTO M 295 and is also approved by multiple state DOTs for asphalt pavement.

SEFA is active and participates in ASTM C09, ASTM C01, ASTM E50, ACI, and ACAA. Questions about ASTM, ACI, or DOT standards and activities can be directed to our Technical Services team.

DOT Approvals

Quality control and quality assurance conducted by SEFA on its fly ash sources is monitored by the respective DOTs. Sources are approved by the following State Departments of Transportation:

  • Florida
  • Georgia
  • Maryland
  • New Jersey
  • North Carolina
  • Pennsylvania
  • South Carolina
  • Tennessee
  • Virginia
  • West Virginia
Manager, Ross Gorman

Ross Gorman, Ph.D., P.E.

Manager, Technical Services


The SEFA Group is heavily involved in the promotion of ready mixed concrete through our involvement in these associations:

ACAA logo.
ACIA logo.
Build with Strength logo.
National Ready Mixed Concrete Association logo.
Carolinas Ready Mixed Concrete Association logo.
GRMCA logo.
Kentucky Concrete Association.
Mississippi Concrete Association logo.
MRMCA logo.
PACA logo.
Tennessee Concrete Association.
VRMCA logo. Build Virginia strong.