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Cement reinforced gypsum foam with mineral wool

  • US 4,310,996 A
  • Filed: 04/23/1980
  • Issued: 01/19/1982
  • Est. Priority Date: 04/23/1980
  • Status: Expired due to Term
First Claim
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1. A thermally insulating composite assembly, comprising generally at least one structural surface element and a low-density cellular gypsum material positioned adjacent to said surface element, said cellular gypsum material comprising a gypsum matrix having minute cavities homogeneously distributed therein, said gypsum material having a dry density of less than about 6 pounds per cubic foot and a thermal coefficient of less than about 0.37, said gypsum matrix including therein:

  • (a) approximately 1 to 15 percent by weight of a cement dispersed homogeneously throughout said gypsum matrix;

    (b) approximately 0.5 to 7 percent by weight of a mineral wool dispersed homogeneously throughout said gypsum matrix; and

    (c) at least approximately 0.25 percent by weight of a chopped glass distributed homogeneously throughout said gypsum matrix.

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