Fly Ash Sales

Fly Ash Sales & Services

The SEFA Group is a national Fly Ash Sales and Marketing leader, providing service and solutions to the construction industry. For four decades, SEFA has been adept at stimulating innovation and new service offerings that can further contribute to customers’ success and environmental stewardship.

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.

Technical Expertise

For over 40 years, SEFA has focused on providing technical expertise to concrete producers. SEFA developed tailored, quality control programs based on a selective collection of the most consistent quality material for customers. Since 1976, SEFA has developed technical expertise in the functional performance of fly ash in virtually every situation, evaluating the best mixtures for particular applications and for differing weather conditions.

Transforming Coal Ash

Best Practice

With STAR® Technology, coal ash is transformed so it can be recycled and encapsulated in concrete. This beneficial use meets all environmental agency requirements for coal ash usage. STAR® Technology is a stand-alone solution that is cost-effective and eliminates long-term liability.

Permanent Solution

Once transformed into a concrete matrix, any contaminants in coal ash are locked up forever. The elimination of ash storage facilities means the elimination of need for long-term monitoring of wells and structures to detect and prevent ground water pollution.

Sustainable

The STAR® Technology solution to coal ash pond closure is an environmentally sustainable option that offers decades of multiple benefits. Reclaiming coal ash from ponds, and processing it into high-quality, consistent material allows it to be recycled for beneficial use in concrete.

Star Refined Pozzolan

Thermally Beneficiated Class F Fly Ash

STAR® Refined Pozzolan has applications ranging from ready-mix concrete to paving to precast products. Not only does STAR Refined Pozzolan 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 Refined Pozzolan 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 the amount of new materials used in manufacturing. It’s recognized by the U.S. Green Building Council as a post-industrial, pre-consumer recycled material, which means it can contribute toward LEED credits.

Those aren’t the only advantages of STAR® Refined Pozzolan. Its superior strength and air entraining characteristics allow its use in more concrete mixes and at higher dosage rates. It also improves workability and reduces permeability, which delays the onset of reinforcing steel corrosion. STAR® Refined Pozzolan allows manufacturers to confidently tailor mixes precisely to meet weather, job, or specification requirements.

More Sustainable Infrastructure

Improved Strength, Durability, and Affordability of concrete projects is achieved with higher replacement ratios of STAR® Ash for Portland cement:

  • The improved pumping capability of high ash concrete mixes means that material can be pumped higher and further, which reduces construction costs and results in higher quality end products.
  • With higher ash usage ratios, the permeability of concrete is reduced which gives concrete structures protection against freeze/thaw deterioration and the penetration of chemicals and salts into the structures that cause corrosion and premature failure.
  • These positive factors combine to offer engineers, architects, and owners a superior end product at a lower cost by using maximum ratios of consistently high-quality STAR® Ash.