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    • Workers laying concrete
    Rights: WSDOT Creative Commons Attribution-NonCommercial-NoDerivs 2.0 Generic Published 25 September 2012 Size: 160 KB Referencing Hub media

    Cement is a key ingredient of concrete, huge volumes of which are poured each day to serve as roading, foundations, structural beams and columns.

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      Limestone uses

      The calcium carbonate content of limestone rocks has been used from the earliest civilisations, dating back to 14,000 BCE, to its extensive use in modern times. It is a valuable resource that ...

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