Providing freezing and thawing resistance to cementitious compositions
AssigneeConstruction Research & Technology GmbH
InventorsMichael L. Kerns, Bruce J. Christensen
Life of this patent
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Abstract
An improved freeze-thaw durability cementitious composition is provided that uses at least partially degradable polymeric particles that are blended directly into the cementitious composition mixture. The degradable polymeric particles provide void spaces in the cementitious material matrix, and such void spaces act to increase freeze-thaw durability of the cementitious material.
Claims22
A cementitious freeze-thaw damage resistant composition comprising hydraulic cement, wherein the hydraulic cement comprises at least one of portland cement, calcium aluminate cement, magnesium phosphate cement, magnesium potassium phosphate cement, or calcium sulfoaluminate cement;
- and polymeric particles at least partially degradable by the cementitious composition environment, wherein the polymeric particles comprise at least one of polylactone polymer, polylactic acid, polyglycolic acid, or copolymers or mixtures thereof.
A method for preparing a freeze-thaw damage resistant cementitious composition comprising forming a mixture of water;
- hydraulic cement wherein the hydraulic cement comprises at least one of portland cement, calcium aluminate cement, magnesium phosphate cement, magnesium potassium phosphate cement, or calcium sulfoaluminate cement;
- and, polymeric particles at least partially degradable by the cementitious composition environment, wherein the polymeric particles comprise at least one of polylactone polymer, polylactic acid, polyglycolic acid, or copolymers or mixtures thereof.
A cementitious freeze-thaw damage resistant composition comprising hydraulic cement, wherein the hydraulic cement comprises at least one of portland cement, calcium aluminate cement, magnesium phosphate cement, magnesium potassium phosphate cement, or calcium sulfoaluminate cement;
- and polymeric particles at least partially degradable by the cementitious composition environment, wherein void spaces are created as at least a portion of the polymeric particles degrade over a period of during hydration, during set, or up to about a month after set of the cementitious composition.
A method for preparing a freeze-thaw damage resistant cementitious composition comprising forming a mixture of water, hydraulic cement, wherein the hydraulic cement comprises at least one of portland cement, calcium aluminate cement, magnesium phosphate cement, magnesium potassium phosphate cement, or calcium sulfoaluminate cement;
- and, polymeric particles at least partially degradable by the cementitious composition environment, wherein void spaces are created when at least of portion of the polymeric particles degrade over a period of during hydration, during set, or up to about a month after set of the cementitious composition.
Dependencies are inferred from the claim text.