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Reduced-carbon footprint concrete compositions

  • US 8,470,275 B2
  • Filed: 07/19/2010
  • Issued: 06/25/2013
  • Est. Priority Date: 09/30/2008
  • Status: Active Grant
First Claim
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1. A method comprising:

  • a) precipitating synthetic carbonates and/or bicarbonates from a solution comprising divalent cations and dissolved CO2 from an industrial waste gas comprising CO2 under set of precipitation conditions that favor precipitation of vaterite in the synthetic carbonate wherein the synthetic carbonate and/or bicarbonate has a δ

    13C less than −

    10‰

    ; and

    b) producing one or more concrete components from the synthetic carbonates and/or bicarbonates wherein the one or more concrete components are selected from the group consisting of cement, supplementary cementitious material, aggregate, and combination thereof.

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