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Use of alumina clay with cement fly ash mixtures

  • US 5,693,137 A
  • Filed: 11/29/1995
  • Issued: 12/02/1997
  • Est. Priority Date: 10/19/1993
  • Status: Expired due to Fees
First Claim
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1. A mix for making fly ash pellets, comprising about 10% portland cement, about 5% of a finely divided alumina containing material selected from the group consisting of calcium aluminate and alumina clays, class "F" fly ash as necessary to make up 100%, and sufficient water for hydration and pelletization, in which said alumina containing material contains at least 35% aluminum oxide.

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