CEMENT BRETT CONCRETE FOR CROSSRAIL TUNNELLINGProduct: PCRM CEM I 52,5N AND WEST BURTON EN450 S GRADE FLY ASH Client: BRETT CONCRETE Main Contractor: DRAGADOS SISK JV Location: BRETT CONCRETE, CHATHAM DOCKS FOR CROSSRAIL TUNNELLING Timescale: SEPTEMBER 2012 TO AUGUST 2014 Lafarge Tarmac customer Brett Concrete used PCRM CEM I 52,5N and EN450 S Grade fly ash to manufacture 110,000 of the 250,000 precast concrete segments that are being

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