• Coal Ash impoundments are largely viewed as corporate and environmental liabilities, eye sores and social burdens.  
  • The production of cement is responsible for 5% of the world's roughly one billion metric tons of Greenhouse Gas emissions (GHG).
  • There are regional Coal Ash shortages in global cement markets.


Clean close the impoundment. Reduce the risk. Improve the bottom line. 

There are hundreds of Coal Ash impoundments in North America. At present, each one represents an unrecognized environmental liability.

But each location also is an unrecognized strategic asset. 

A key component of any new infrastructure project is high performance concrete. Coal Ash has long been recognized for its pozzolanic properties and it is regularly specified as a key ingredient for mega projects like the new World Trade Center Complex in New York and the Confederation Bridge in Prince Edward Island.

The key challenge is procuring large quantities of consistently uniform ash product.

SonoAsh separation technology consistently beneficiates variable quality coal ash into the world’s first truly recycled and green building material, ideal for high performance concrete (HPC) applications.

Based on research at the University of Kentucky Center for Advanced Energy Research, we know that uniform particle size is the key quality metric of Coal Ash used in high performance concrete applications. 

The SonoAsh process delivers uniform ash particle size that is also a LEED eligible pozzolanic material that reduces energy, greenhouse gases, water & chemical use while addressing unrecognized environmental corporate liabilities. 

reduce greenhouse gas emissions 

What has not been considered in the global drive for reduced greenhouse gas (GHG) emissions is the role that Coal Ash plays today in the building materials supply chain. Coal Ash is used as a displacement for ordinary portland cement (OPC).  

The cement industry currently accounts for roughly 5% of the world's greenhouse gas emissions. One ton of produced cement equals one ton of CO2 in our atmosphere.

The SonoAsh patented, sonication process consistently reduces the carbon content in Coal Ash from 5-12%+ loss on ignition (LOI) to <1% . 

With the carbon reduced from the Coal Ash and a manufactured uniform particle size, the global GHG impacts of enhanced beneficiation of Coal Combustion Residuals (CCR) is significant when used as a displacement for OPC. 

Currently, production Coal Ash (where possible) is sold as an "ingredient" into the cement marketplace and does not allow any benefits to be credited to power production. Instead, the cement industry takes full credit by using a "waste" product in their ready mix formulation list.  

SonoAsh beneficiation offers a greater GHG offset opportunity to be realized by directly power producers and regional governments. 


Coal Ash remains the most important pozzolonic additive to concrete. However, there is an increasing spot shortage of production Coal Ash supplies in some regions of North America with the replacement of coal in domestic distributed energy systems.   

Coal plant closures are impacting haulage distances and the market price structures create new opportunities as the United States is currently a net importer of Coal Ash. 

With these emerging pressure points, Coal Ash will become an internationally tradeable commodity. The reclamation of impounded and landfilled Coal Ash and will soon be favored to meet the growing demand. 

The SonoAsh process will allow Coal power producers to view their Coal Ash impoundments as strategic assets and realize the potential of a rapidly evolving Coal Ash market.