Aggregate materials and methods of preparation thereof
AssigneeEm Resources LLC
InventorsRafic Y. Minkara, Eleazar I. Diaz Loya, Anupam R. Joshi, Hunter D. Culberson
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Abstract
Aggregates useful in building materials such as concrete are described. The aggregates may include fly ash and an inorganic polymer binder, which may be present as an outer layer on a core of fly ash. Methods of preparing the aggregates and concrete mixtures comprising the aggregates are also described. For example, the aggregates may be prepared by contacting fly ash agglomerates with an alkaline solution. The concrete mixtures may comprise the aggregates and a hydraulic cement.
Claims19
Aggregates comprising fly ash and an inorganic polymer binder, wherein the aggregates comprise calcium, potassium, sodium, lithium, or combinations thereof, wherein the aggregates comprise a fly ash core at least partially covered by a layer of the inorganic polymer binder having a thickness greater than or equal to 0.75 mm.
A concrete mixture comprising:
- aggregates comprising fly ash and an inorganic polymer binder, wherein the aggregates comprise calcium, potassium, sodium, lithium, or combinations thereof;
- and
- a hydraulic cement, wherein the hydraulic cement comprises fly ash, and a weight ratio of the aggregates to the fly ash is 5:1 to 1:1.
A method of preparing aggregates comprising contacting fly ash agglomerates with an alkaline solution comprising NaOH, KOH, LiOH, or a salt of an organic acid, wherein the fly ash agglomerates have an average particle size of 2 mm to 25 mm.
A method of preparing aggregates for a concrete mixture, the method comprising:
- hydrating fly ash agglomerates having an average particle size of 2 mm to 25 mm;
- and
- contacting the hydrated fly ash agglomerates with an alkaline solution comprising NaOH, KOH, LiOH, or a salt of an organic acid to thereby produce the aggregates.
Dependencies are inferred from the claim text.