Please download the dossier by clicking on the dossier button x
×

Lightweight cementitious compositions and building products and methods for making same

  • US 8,298,332 B2
  • Filed: 10/27/2011
  • Issued: 10/30/2012
  • Est. Priority Date: 07/05/2007
  • Status: Active Grant
First Claim
Patent Images

1. A cement board having a density of about 45 to 85 pounds per cubic foot (0.72 to 1.36 g/cc), and having a continuous phase resulting from the curing of an aqueous mixture comprising:

  • 35-60 parts by weight Portland cement-based binder,2-10 parts by weight expanded and coated perlite filler having a mean particle diameter of about 20 to 90 microns,10-50 volume % entrained air, andoptional additives selected from one or more members of the group consisting of water reducing agents, set-accelerators, set-retarders; and

    0-25 parts by weight secondary filler, wherein the secondary filler is at least one of blast furnace slag, volcanic tuff, expanded clay, shale aggregate, hollow ceramic spheres, hollow plastic spheres, expanded plastic beads and pumice.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×