Back to results
US 7,442,248 B2Granted
Cementitious composition
AssigneeResearch Incubator, Ltd.
InventorScott F. Timmons
Life of this patent
Estimating the term…
Abstract
Cementitious compositions comprising pozzolonic materials, alkaline earth metals, and a catalyst to catalyze the reaction between the pozzolonic materials and the alkaline earth metals.
Claims24
A cementitious composition comprising:
- pozzolonic material selected from the group consisting of fly ash, calcined or uncalcined volcanic ash, rice hull ash, and combinations thereof;
- catalyst selected from the group consisting of alkali-containing zeolite, alkali-containing feldspathoid, and combinations thereof;
- where, upon addition of sufficient water and exposure to effective curing conditions, the cementitious composition is effective at a ratio of 0.02 or more catalyst to cementitious composition to produce a cement product having a strength at 24 hours that is greater than the strength of the same cement product made under the same conditions using NaOH as catalyst.
A cementitious composition comprising:
- fly ash;
- catalyst selected from the group consisting of alkali-containing zeolite, alkali-containing feldspathoid, and combinations thereof;
- where, upon addition of sufficient water and exposure to effective curing conditions, the cementitious composition is effective at a ratio of 0.02 or more catalyst to cementitious composition to produce a cement product having a strength at 24 hours that is greater than the strength of the same cement product made under the same conditions using NaOH as catalyst.
A cementitious composition comprising:
- Class F fly ash;
- calcium containing material comprising compound(s) selected from the group consisting of CaO and Ca(OH)2, and combinations thereof;
- and
- catalyst selected from the group consisting of alkali-containing zeolite, alkali-containing feldspathoid, and combinations thereof, the catalyst being adapted to catalyze the pozzolonic reaction between the calcium containing material and the pozzolonic material;
- where, upon addition of sufficient water and exposure to effective curing conditions, the cementitious composition is effective at a ratio of 0.02 or more catalyst to cementitious composition to produce a cement product having a strength at 24 hours that is greater than the strength of the same cement product made under the same conditions using NaOH as catalyst.
2 more elements
A cementitious composition comprising:
- from about 80 wt. % to about 95 wt. % fly ash, based on the total weight of the cementitious composition;
- Portland cement;
- and
- one or more catalyst selected from the group consisting of an alkali-containing zeolite, an alkali-containing feldspathoid, and combinations thereof, the one or more catalyst providing sufficient alkali metal to catalyze the pozzolonic reaction between the Portland cement and the fly ash;
- where, upon addition of sufficient water and exposure to effective curing conditions, the cementitious composition is effective at a ratio of 0.02 or more catalyst to cementitious composition to produce a cement product having a strength at 24 hours that is greater than the strength of the same cement product made under the same conditions using NaOH as catalyst.
2 more elements
Dependencies are inferred from the claim text.