Skip to Content
Skip to Menu
Skip to Footer
A close-up of a factory.


Refined Pozzolan

Class F Fly Ash

STAR® Ash is a high-quality, specification-grade refined pozzolan used as a supplementary cementitious material in concrete and concrete products. Harvested ash from ponds or landfills goes through the STAR® thermal beneficiation process where it is transformed into a consistent, low LOI, Class F fly ash for encapsulated beneficial use. Reclaiming coal ash from ponds provides year-round availability of this post-industrial, recycled material for the construction industry.

Sustainable Material
Local Source
Continual Supply
DOT Approved

Superior Air-Entraining Characteristics

STAR® Ash has applications ranging from ready-mix concrete to paving to precast products. Not only does it exceed all the requirements for the most stringent specifications for fly ash used as a supplementary cementitious material, it also has superior air-entraining characteristics. Concrete producers can use the same dosage rate of air-entraining admixture in all of their concrete mixes – regardless of the amount of STAR® Ash used in the mix design. These “transparent” air-entraining characteristics lower the concrete producer’s cost for quality control and reduce the amount of concrete rejected at the job site. It also promotes sustainable development by cutting down on a number of new materials used in manufacturing and is recognized by the U.S. Green Building Council as a post-industrial, pre-consumer recycled material, which means it can contribute toward LEED credits.

In addition to its superior strength and air entraining characteristics, it also improves workability and reduces permeability, which delays the onset of reinforcing steel corrosion. STAR® Ash allows manufacturers to confidently tailor mixes precisely to meet weather, job or specification requirements.

Arial view of bridge construction.


  • Ready Mixed Concrete
  • Ternary Concrete Mixtures with Slag Cement
  • Concrete Paving
  • CLSM / High Density and Low Density Flowable Fill
  • Cellular Concrete
  • Precast and Pre-Stressed Products:
  • Block, Pipe, Vaults, etc.
  • Asphaltic (SMA) Coarse Graded SuperPave
  • Ultrix® Ultra Fine Pozzolan
  • Sustainable Development
  • LEED Green Building Council

Performance in Concrete

Let SEFA’s Technical Sales Representatives show you how your concrete may have:

  • Increased ultimate strength
  • Greater durability and longer lasting concrete
  • Improved workability
  • Mitigation of Alkali-Silica Reactivity (ASR)
  • Reduced permeability
  • Enhanced finishablilty
  • Reduced segregation
  • Improved sulfate resistance
  • Reduced bleeding and drying shrinkage
  • Improved pumpability
  • Improved watertightness
  • Reduced heat of hydration
  • Reduced efflorescence
  • Improved resistance in marine environments
  • 100% Recycled Material
Two people spreading concrete.
Person holding a bag of STAR Fly Ash.

Bagged Fly Ash

SEFA has bagged STAR fly ash products! We now have the ability to provide our STAR® beneficiated Class F fly ash in 50 lbs. paper bags or 2000 lbs. super sacks. This is the same high-quality, specification-grade fly ash for use as a supplementary cementitious material in concrete and concrete products that our customers have become accustomed to.


How will STAR Refined Pozzolan improve my concrete performance?

An arrow icon.

STAR Refined Pozzolan contributes to the overall quality and performance of concrete with increased ultimate strength, greater durability, and reduced bleeding and drying shrinkage, improved workability and finishability. STAR Refined Pozzolan is a manufactured product that surpasses the quality and consistency of byproduct fly ash.

Will STAR Refined Pozzolan perform in conjunction with Slag?

An arrow icon.

STAR Refined Pozzolan can be used in slag cement to mitigate ASR resistance, reduce segregation, and improve sulfate resistance.

Does STAR Refined Pozzolan help with green building and sustainable construction?

An arrow icon.

Class F fly ash, like STAR Refined Pozzolan, is one of the best strategies to defend against deterioration due to Alkali-Silica Reactivity (ASR).  Reactive fly ash also reduces permeability which delays the onset of reinforcing steel corrosion.

Is STAR Refined Pozzolan compatible with chemical admixtures in concrete?

An arrow icon.

The only sure way to know how any admixtures, chemical or mineral, behave together is to test them. Independent testing shows that concrete made with STAR Refined Pozzolan has essentially the same air dosage rates as plain Portland mixes.

Is STAR® Refined Pozzolan considered an environmentally-responsible material?

An arrow icon.

Yes. STAR® Refined Pozzolan is a 100% post-industrial recycled material from coal combustion to produce electricity. Using STAR® Refined Pozzolan as a mineral admixture in concrete reduces the demand to manufacture Portland cement and other virgin materials. We also convert 100% of the fly ash that would otherwise have been sent to a disposal site into a useful product.

Will STAR® Ash affect my concrete mix design?

An arrow icon.

STAR Refined Pozzolan can be used in more concrete mixes and at higher dosage rates. STAR Refined Pozzolan will not affect the ability of your air entraining agent to build and maintain an air void system in concrete.

Is STAR® Ash considered an environmentally responsible material?

An arrow icon.

Yes, coal ash from ponds or landfills is harvested and transformed into a consistent, low LOI, Class F fly ash for encapsulated beneficial use. Removing coal ash permanently from ground storage and recycling it for beneficial use in concrete is an environmentally responsible solution for people and the environment.

How can I find out more about STAR® Ash?

An arrow icon.

Contact SEFA Fly Ash Sales using the website contact form.