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US 10,112,870 B2Granted
Self-desiccating, dimensionally-stable hydraulic cement compositions with enhanced workability
AssigneeUnited States Gypsum Company
InventorsPaul White, Ashish Dubey
Life of this patent
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Abstract
Cementitious binder compositions for cementitious products including a hydraulic cement-based reactive powder blend, an inorganic flow control agent, and a metal-based dimensional movement stabilizing agent including at least one member of the group of lithium salt and lithium base, and methods for making the cementitious binder compositions.
Claims22
A cementitious composition comprising a reaction product of a mixture of:
- a hydraulic cement-based reactive powder comprising:
- an aluminate cement selected from at least one member of the group consisting of calcium aluminate cement and calcium sulfoaluminate cement in an amount of 30-75 parts by weight per 100 parts by weight of the hydraulic cement-based reactive powder,
- Portland cement in an amount of 5-35 parts by weight per 100 parts by weight of the hydraulic cement-based reactive powder, and
- a calcium sulfate selected from the group consisting of calcium sulfate dihydrate, calcium sulfate hemihydrate, anhydrous calcium sulfate and mixtures thereof, the calcium sulfate in an amount of 20-40 parts by weight per 100 parts by weight of the hydraulic cement-based reactive powder;
- an inorganic flow control agent in a weight ratio of inorganic flow control agent to hydraulic cement-based reactive powder of 0.5:1 to 2.0:1, wherein the inorganic flow control comprises at least one member selected from the group consisting of fly ash and calcium carbonate and wherein average particle size of the calcium carbonate ranges from about 10 to 150 microns;
- a metal-based dimensional movement stabilizing agent in an amount equal to 1.0 to 4.0 weight percent of the hydraulic cement-based reactive powder, wherein the metal-based dimensional movement stabilizing agent comprises a lithium compound selected from at least one member of the group of lithium salt and lithium base, wherein the lithium salt is at least one member of the group of lithium carbonate, lithium sulfate, lithium nitrate, lithium nitrite, and lithium silicate, wherein the base is lithium hydroxide;
- a filler in a weight ratio of filler to hydraulic cement-based reactive powder of 0.5:1 to 3.5:1;
- and
- water in a weight ratio of water to hydraulic cement-based reactive powder of 0.6:1 to 1.3:1.
6 more elements
A cementitious composition comprising a reaction product of a mixture of:
- a hydraulic cement-based reactive powder comprising:
- an aluminate cement selected from at least one member of the group consisting of calcium aluminate cement and calcium sulfoaluminate cement in an amount of 25-80 parts by weight per 100 parts by weight of the hydraulic cement-based reactive powder,
- Portland cement in an amount of 2.5-45 parts by weight per 100 parts by weight of the hydraulic cement-based reactive powder, and
- a calcium sulfate selected from the group consisting of calcium sulfate dihydrate, calcium sulfate hemihydrate, anhydrous calcium sulfate and mixtures thereof, the calcium sulfate in an amount of 15-45 parts by weight per 100 parts by weight of the hydraulic cement-based reactive powder;
- an inorganic flow control agent in a weight ratio of inorganic flow control agent to hydraulic cement-based reactive powder of 0.25:1 to 3.0:1, wherein the inorganic flow control comprises at least one member selected from the group consisting of fly ash and calcium carbonate and wherein average particle size of the calcium carbonate ranges from about 10 to 150 microns;
- a metal-based dimensional movement stabilizing agent in an amount equal to 0 to 5.0 weight percent of the hydraulic cement-based reactive powder, wherein the metal-based dimensional movement stabilizing agent comprises a lithium compound selected from at least one member of the group of lithium salt and lithium base, wherein the lithium salt is at least one member of the group of lithium carbonate, lithium sulfate, lithium nitrate, lithium nitrite, and lithium silicate, wherein the base is lithium hydroxide;
- a filler in a weight ratio of filler to hydraulic cement-based reactive powder of 0:1 to 5.0:1;
- and
- water in a weight ratio of water to hydraulic cement-based reactive powder of 0.5:1 to 1.4:1;
- wherein the hydraulic cement-based reactive powder comprises:
- 25-75 parts by weight calcium sulfoaluminate cement per 100 parts by weight of the hydraulic cement-based reactive powder;
- and 2.5-45 parts by weight calcium aluminate cement per 100 parts by weight of the hydraulic cement-based reactive powder.
9 more elements
A cementitious composition comprising a reaction product of a mixture of:
- a hydraulic cement-based reactive powder comprising:
- an aluminate cement selected from at least one member of the group consisting of calcium aluminate cement and calcium sulfoaluminate cement in an amount of 25-80 parts by weight per 100 parts by weight of the hydraulic cement-based reactive powder,
- Portland cement in an amount of 2.5-45 parts by weight per 100 parts by weight of the hydraulic cement-based reactive powder, and
- a calcium sulfate selected from the group consisting of calcium sulfate dihydrate, calcium sulfate hemihydrate, anhydrous calcium sulfate and mixtures thereof, the calcium sulfate in an amount of 15-45 parts by weight per 100 parts by weight of the hydraulic cement-based reactive powder;
- an inorganic flow control agent in a weight ratio of inorganic flow control agent to hydraulic cement-based reactive powder of 0.25:1 to 3.0:1, wherein the inorganic flow control agent is calcium carbonate in the absence of fly ash and wherein average particle size of the calcium carbonate ranges from about 10 to 150 microns;
- a metal-based dimensional movement stabilizing agent in an amount equal to 0 to 5.0 weight percent of the hydraulic cement-based reactive powder, wherein the metal-based dimensional movement stabilizing agent comprises a lithium compound selected from at least one member of the group of lithium salt and lithium base, wherein the lithium salt is at least one member of the group of lithium carbonate, lithium sulfate, lithium nitrate, lithium nitrite, and lithium silicate, wherein the base is lithium hydroxide;
- a filler in a weight ratio of filler to hydraulic cement-based reactive powder of 0:1 to 5.0:1;
- and
- water in a weight ratio of water to hydraulic cement-based reactive powder of 0.5:1 to 1.4:1.
6 more elements
A cementitious composition comprising a reaction product of a mixture of:
- a hydraulic cement-based reactive powder comprising:
- an aluminate cement selected from at least one member of the group consisting of calcium aluminate cement and calcium sulfoaluminate cement in an amount of 25-80 parts by weight per 100 parts by weight of the hydraulic cement-based reactive powder,
- Portland cement in an amount of 2.5-45 parts by weight per 100 parts by weight of the hydraulic cement-based reactive powder, and
- a calcium sulfate selected from the group consisting of calcium sulfate dihydrate, calcium sulfate hemihydrate, anhydrous calcium sulfate and mixtures thereof, the calcium sulfate in an amount of 15-45 parts by weight per 100 parts by weight of the hydraulic cement-based reactive powder;
- an inorganic flow control agent in a weight ratio of inorganic flow control agent to hydraulic cement-based reactive powder of 0.25:1 to 3.0:1, wherein the inorganic flow control comprises at least one member selected from the group consisting of fly ash and calcium carbonate and wherein average particle size of the calcium carbonate ranges from about 10 to 150 microns;
- a metal-based dimensional movement stabilizing agent in an amount equal to 0 to 5.0 weight percent of the hydraulic cement-based reactive powder, wherein the metal-based dimensional movement stabilizing agent comprises a lithium compound selected from at least one member of the group of lithium salt and lithium base, wherein the lithium salt is at least one member of the group of lithium carbonate, lithium sulfate, lithium nitrate, lithium nitrite, and lithium silicate, wherein the base is lithium hydroxide;
- a filler in a weight ratio of filler to hydraulic cement-based reactive powder of 0:1 to 5.0:1;
- and
- water in a weight ratio of water to hydraulic cement-based reactive powder of 0.5:1 to 1.4:1;
- wherein the mixture has an absence of alkali metal citrate.
7 more elements
Dependencies are inferred from the claim text.