Trucks load up with concrete mix at the Concrete Supply facility on Metromont Rd. in north Charlotte in this file photo. The silo on the left contains fly ash, an ingredient of concrete.
Trucks load up with concrete mix at the Concrete Supply facility on Metromont Rd. in north Charlotte in this file photo. The silo on the left contains fly ash, an ingredient of concrete. JEFF WILLHELM jwillhelm@charlotteobserver.com
Trucks load up with concrete mix at the Concrete Supply facility on Metromont Rd. in north Charlotte in this file photo. The silo on the left contains fly ash, an ingredient of concrete. JEFF WILLHELM jwillhelm@charlotteobserver.com

Business

March 31, 2016 5:22 PM

Concrete makers look to import coal ash

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