Cementitious compositions containing magnesium compounds to provide sag resistance
AssigneeTile Council of America, Inc.
InventorDavid R. Burley
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Abstract
Hydraulic cementitious compositions are disclosed which have as an additive to provide sag resistance a compound selected from among magnesium oxide having an iodine number of greater than twenty or magnesium hydroxide.
Claims13
A dry-set mortar composition having sag resistance, said composition being capable of admixture with water, which comprises a Portland cement, a water retentive cellulosic material and as an additive to provide improved sag resistance, at least 0.5%. by weight, based on the weight of said composition, of a reactive magnesium oxide having an iodine number of greater than twenty.
A dry-set mortar composition having improved sag resistance, said composition being capable of admixture with water, which comprises a Portland cement, a water retentive cellulosic material and as an additive to provide improved sag resistance, at least 0.5% by weight, based on the weight of said composition, of a compound selected from the group consisting essentially of a reactive magnesium oxide having an iodine number of greater than twenty and magnesium hydroxide.
A dry-set mortar composition having improved sag resistance, said composition being capable of admixture with water, which comprises:
- a. from about 25 to about 99% by weight of Portland cement;
- b. from about 0 to about 75% by weight of an aggregate material selected from the group consisting of sand, powdered limestone and mixtures thereof;
- c. from about 0.2 to about 6.5% be weight of a cellulosic water retentive agent;
- and
- d. from about 1 to about 10% by weight of a reactive magnesium oxide, said magnesium oxide having an iodine number of greater than twenty.
Dependencies are inferred from the claim text.