Back to results
US 10,968,142 B2Granted
Enhanced carbonation and carbon sequestration in cementitious binders
AssigneeThe Regents of the University of California
InventorsGaurav Sant, Kirk E. Vance, Magdalena Balonis
Life of this patent
Estimating the term…
Abstract
A manufacturing process of a cement product includes: (a) reacting at least one anhydrous or hydrated cement component with liquid or supercritical CO2 to form a cement composition; and (b) curing the cement composition to form a cement product.
Claims16
A manufacturing process of a cement-based product, comprising:
- (a) combining at least one cement component that includes portlandite (Ca(OH)2) with aggregates;
- (b) shaping the at least one cement component and the aggregates to form a monolithic structural element;
- subsequent to the shaping in (b),
- (c) disposing the monolithic structural element in a reactor;
- (d) exposing the monolithic structural element in the reactor to gaseous CO2 to form a cement-based product,
- wherein the exposing in (d) includes converting portlandite to calcium carbonate, and
- wherein a partial pressure (concentration) of the CO2 present in the reactor is higher than a partial pressure of CO2 in ambient atmosphere.
4 more elements
A manufacturing process, comprising:
- (a) disposing a reactant in a reactor, wherein the reactant is in a monolithic form and includes portlandite and aggregates, and a water content of the reactant mixture is no greater than 25% by mass;
- (b) introducing CO2 into the reactor;
- and
- (c) exposing the reactant to gaseous CO2 for a reaction time period to form calcium carbonate,
- wherein a partial pressure of the CO2 present in the reactor is higher than a partial pressure of CO2 in ambient atmosphere.
2 more elements
Dependencies are inferred from the claim text.