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Manufactured natural pozzolan, improved manufactured natural pozzolan-based cement and method of making and using same

  • US 10,059,628 B2
  • Filed: 12/13/2017
  • Issued: 08/28/2018
  • Est. Priority Date: 10/04/2016
  • Status: Active Grant
First Claim
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1. A composition comprising:

  • a first mineral in particulate form having a volume-based average particle size of approximately 15 to approximately 60 μ

    m and having a first pozzolanic reactivity, wherein the first mineral comprises;

    approximately 45% to approximately 55% by weight SiO2 approximately 5% to approximately 15% Al2O3, approximately 5% to approximately 20% Fe2O3 and approximately 1% to approximately 20% CaO; and

    an amorphous content of less than or equal to 25% by weight and approximately 5% to approximately 60% by weight Plagioclase Feldspar; and

    a second mineral in particulate form and having a second pozzolanic reactivity greater than the first mineral pozzolanic reactivity, wherein the second mineral is Metakaolin having a volume-based average particle size of approximately 0.1 to approximately 10 μ

    m and wherein particles of the second mineral are disposed on the surface of the first mineral.

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