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John Smeaton invents modern concrete (hydraulic cement). Introduces the dominant construction material of the modern age.

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current16:43, 22 October 2016Thumbnail for version as of 16:43, 22 October 2016400 × 370 (87 KB)TGriff (talk | contribs)John Smeaton invents modern concrete (hydraulic cement). Introduces the dominant construction material of the modern age.

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