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Backfill, methods of making, and use thereof

  • US 9,573,849 B2
  • Filed: 04/30/2014
  • Issued: 02/21/2017
  • Est. Priority Date: 02/24/2014
  • Status: Active Grant
First Claim
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1. A composition, comprising:

  • one or more mine tailings present in an amount greater than 25% by weight of the composition;

    one or more cementitious binder materials present in an amount ranging from 0% to 12% by weight of the composition;

    purified attapulgite substantially free of non-attapulgite minerals present in an amount ranging from 0.01% to 0.7% by weight of the composition; and

    water;

    wherein the fines content (Fc) of the one or more mine tailings is greater than or equal to 3%.

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