US: Ash Grove Cement and the Nebraska Department of Transportation have tested a calcined clay blended cement product on a 4km stretch of road in the state. The product, Duracem N, was manufactured at the company’s Louisville Plant. It uses clay sourced locally in the region. The Louisville Plant was reportedly upgraded recently to convert a clinker kiln into a clay calciner. Improvements were also made to the milling process.
Full-scale production of Duracem N will begin early in 2026, with customer deliveries expected in mid-2026. The product has been approved for use by the Nebraska Department of Transportation, with further approvals forthcoming.