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HEAT RESISTANT AND FIRE RETARDANT MATERIALS AND METHODS FOR PREPARING SAME

  • US 20110155019A1
  • Filed: 06/30/2009
  • Published: 06/30/2011
  • Est. Priority Date: 07/01/2008
  • Status: Active Grant
First Claim
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1. A cement blend for making concrete, the cement blend comprising:

  • 60-90 wt. % Portland cement;

    0.1-6 wt. % fumed silica having an average particle size of from 1 to 150 microns;

    1-9 wt. % hollow microspheres.

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