Aggregate materials and methods of preparation thereof
AssigneeBoral Resources LLC
InventorsRafic Y. MINKARA, Eleazar I. DIAZ LOYA, Anupam R. JOSHI, Hunter D. CULBERSON
Life of this patent
Estimating the term…
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.
Claims21
Aggregates comprising fly ash and an inorganic polymer binder, wherein the aggregates comprise calcium, potassium, sodium, lithium, or combinations thereof.
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.