The latest findings from the American Coal Ash Association (ACAA) Production and Use Survey reveal notable trends in coal ash consumption and utilization for the year 2022. Despite a slight decrease in fly ash usage in concrete, down to 10.9 million tons compared to the previous year, there was an overall 8 percent increase in the utilization of all coal combustion products (CCP) in cement production, reaching just over 6 million tons. While there’s a clear desire among concrete producers and consumers to integrate more fly ash into their mixes, regional market fluctuations stemming from the closure of coal-fired power plants continue to impact supply dynamics.
Concrete and cement production represented more than one-third of the total 46.8 million tons of CCP beneficially used in 2022, marking a 1 percent increase from the previous year. However, shipments to another major construction market, wallboard-grade synthetic gypsum derived from flue gas desulphurization, experienced a 4 percent decline, totalling 11.3 million tons.
The survey also highlights a significant shift in the treatment of high carbon content coal ash, previously relegated to impoundments or landfills. Thanks to market advancements and improved processing technologies, this material now demonstrates commercial viability. In 2022, over 4 million tons of previously disposed ash found new life in various applications, including concrete-grade fly ash and cement kiln raw feed.
ACAA Executive Director, Thomas Adams, notes, “The increasing utilization of harvested coal combustion products underscores the adaptability of beneficial use markets amidst the decline in coal-based electricity generation in the U.S. To sustain this momentum, we must continue to invest in innovative logistics and technology strategies that ensure these resources are readily available for safe and productive use.”
He emphasizes the industry’s commitment to enhancing the quality and availability of coal ash products while reducing reliance on landfills. Achieving higher levels of beneficial use necessitates substantial investments in technology and logistics to meet customer demands consistently.
As the landscape of America’s electricity generation evolves, so too does the coal ash beneficial use industry. By harnessing these resources effectively, the industry aims to not only minimize environmental impact but also maximize the economic and practical benefits of coal ash utilization.
