Back to results
US 9,133,058 B2Granted
Cementitious compositions for decreasing the rate of water vapor emissions from concrete and methods for preparing and using the same
AssigneeU.S. Concrete, Inc.
InventorsRaymond C. Turpin, Jr., Ryan A. Henkensiefken
Life of this patent
Estimating the term…
Abstract
Cementitious compositions and processes for preparing and using the cementitious compositions are provided. The cementitious compositions are characterized by the property of a reduced or an attenuated water vapor emission from a cementitious mix and a concrete formed therefrom.
Claims27
A cementitious composition for attenuating water vapor emission from a concrete made therefrom, comprising:
- a hydraulic cement;
- a superplasticizer;
- a finely divided material having a particle size of less than 75 microns;
- and
- a water vapor attenuation agent comprising at least one alkali metal salt selected from the group consisting of alkali metal halide salts, alkali metal nitrate salts, and alkali metal nitrite salts, the at least one alkali metal salt having a concentration of from about 0.24% to about 4.72% by weight of the cementitious composition in order to reduce internal relative humidity of concrete made from the cementitious composition and attenuate water vapor emission from the concrete.
2 more elements
A cementitious composition for decreasing a rate of water vapor emission from a concrete comprising:
- a hydraulic cement;
- a superplasticizer;
- and
- a water vapor attenuation agent comprising at least one alkali metal salt selected from the group consisting of alkali metal halide salts, alkali metal nitrate salts, and alkali metal nitrite salts, the at least one alkali metal salt having a concentration in a range from about 0.24% to about 4.72% by weight of the cementitious composition in order to reduce internal relative humidity of concrete made from the cementitious composition.
1 more element
A cementitious mix comprising:
- a hydraulic cement having a concentration from about 8% to about 35% by weight based on a total weight of the cementitious mix on a water-free basis;
- an aggregate having a concentration from about 50% to about 85% by weight based on the total weight of the cementitious mix on a water-free basis;
- a densifying calcium silicate precursor having a concentration from about 2.5% to about 25% by weight based on the total weight of the cementitious mix on a water-free basis;
- a water vapor attenuation agent having a concentration from about 0.5% to about 18% by weight based on a total weight of the hydraulic cement;
- an amount of water sufficient to provide a water to cementitious ratio in the cementitious mix of from about 0.2 to about 0.6;
- and
- a polycarboxylate superplasticizer having a concentration from about 2 ounces to about 30 ounces per 100 pounds of the hydraulic cement,
- wherein the cementitious mix is used to prepare a concrete having an attenuated water vapor emission.
5 more elements
A cementitious mix comprising:
- a hydraulic cement having a concentration from about 8% to about 35% by weight based on a total weight of the cementitious mix on a water-free basis;
- an aggregate having a concentration from about 50% to about 85% by weight based on the total weight of the cementitious mix on a water-free basis;
- a water vapor attenuation agent comprising at least one alkali metal salt selected from the group consisting of alkali metal halide salts, alkali metal nitrate salts, and alkali metal nitrite salts, the at least one alkali metal salt having a concentration from about 0.24% to about 4.72% by weight of the cementitious mix;
- and
- an amount of water to provide a water to cementitious ratio of from about 0.2 to about 0.6,
- wherein the hydraulic cement, aggregate, water vapor attenuation agent, and water are selected and proportioned so that a hardened concrete produced from the cementitious mix achieves an internal relative humidity of no more than 75% in 50 days or less when evaluated in accordance with ASTM F 2170.
3 more elements
Dependencies are inferred from the claim text.