After their coal fly ash spill in December, maybe Tennessee Valley Authority should contact our good friends from Nalco regarding the company's development of fly ash application as a cement substitute.
Nalco's subsidiary Nalco Mobotec recently announced a joint venture deal with Canada-based SONIC Technology Solutions to expand the use of fly ash from coal-powered stations as a cement substitute or concrete additive.
Nalco said SONIC's SonoAsh process can turn low-grade waste fly ash into a valuable high-grade product with carbon credits for both the electric utility and cement industries.
Around 65% of North America's fly ash is said to be unacceptable for use in the cement industry and just ends up in landfill. Not only will SONIC's technology reduce landfill waste but it will also reduce carbon dioxide emissions from the cement industry.
Production of cement, which is very energy intensive, is said to contribute 7% global carbon dioxide emissions. Global cement demand, according to Nalco, approaches 3 billion tons/year and has grown rapidly in recent years.