Continental completes portland-limestone cement migration

Sources: Summit Materials Inc., Denver; CP staff Summit Materials’ Missouri subsidiary, Continental Cement Co. LLC, has consummated a full conversion from clinker-only to portland-limestone cement output at its Hannibal plant— four months after a similar transition at a sister mill up the Mississippi River in Davenport, Iowa. The PLC is typically finished at a 90/10 clinker and ground limestone blend. …

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