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LIGHTWEIGHT CEMENTITIOUS COMPOSITIONS AND BUILDING PRODUCTS AND METHODS FOR MAKING SAME

  • US 20090011207A1
  • Filed: 07/05/2007
  • Published: 01/08/2009
  • Est. Priority Date: 07/05/2007
  • Status: Active Grant
First Claim
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1. A method of providing a lightweight cementitious slurry comprising:

  • forming a mixture of;

    35 to 60 wt. %, on a wet basis, cementitious reactive powder comprising Portland cement,2 to 10 wt. %, on a wet basis, expanded and chemically coated water tight and water repellant perlite filler,20 to 40 wt. % water,0 to 25 wt. %, on a wet basis, secondary filler;

    10 to 50 vol. %, on a wet basis, entrained air; and

    optional additive selected from at least one member of the group consisting of water reducing agents, chemical set-accelerators, chemical set-retarders, air-entraining agents, and foaming agents;

    under conditions which provide an initial slurry temperature of at least about 40°

    F. (4.4°

    C.).

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