High strength concrete-like fluorogypsum-based blends and production methods

Patent metadata

Field	Value
Publication number	US-10865147-B2
Application number	US-201816129515-A
Country	US
Kind code	B2
Filing date	Sep 12, 2018
Priority date	Sep 12, 2017
Publication date	Dec 15, 2020
Grant date	Dec 15, 2020

Abstract

High-strength concrete-like FG blends and methods for producing them are described. The blend includes FG, hydraulic cement, additional alkali material, and pozzolanic material. The blend further includes an admixture used in the formulation of concrete. The blend further includes an aggregate. The aggregate is a coarse aggregate or a fine aggregate.

First claim

The invention claimed is:

1. A process of forming a fluorogypsum-based concrete material, comprising:
mixing fluorogypsum (FG) with circulating fluidized bed combustion ash (CFBCA) to obtain treated FG;
mixing the treated FG with a pozzolanic material and hydraulic cement to form a dry mixture;
mixing the dry mixture with water at a water over dry material ratio of less than about ⅓ to form a wet blend; and
allowing the wet blend to cure to form a fluorogypsum-based concrete material.

2. The process of claim 1 , further comprising:
mixing the dry mixture with an admixture used in a formulation of concrete to form a second dry mixture before mixing with the water; and
mixing the second dry mixture with the water to form the wet blend.

3. The process of claim 1 , further comprising
mixing the dry mixture with aggregate to form an aggregated mixture before mixing with the water; and mixing the aggregated mixture with the water to form the wet blend.

4. The process of claim 1 , wherein the pozzolanic material is fly ash.

5. The process of claim 1 , wherein the cement is Portland cement.

6. The process of claim 1 , wherein the pozzolanic material is fly ash and the cement is Portland cement.

7. The process of claim 1 , wherein an additional alkali material is added.

8. The process of claim 6 , wherein an additional alkali material is added.

Assignees

• Barbato Michele
• Bigdeli Yasser
• Gutierrez Wing Maria Teresa
• Lofton Charles Davis
• Univ Louisiana State

Inventors

• Barbato Michele
• Bigdeli Yasser
• Gutierrez-Wing Maria Teresa
• Lofton Charles Davis

Classifications

• C04B7/13

  Mixtures thereof with inorganic cementitious materials, e.g. Portland cements · CPC title

• C04B28/16 Primary

  containing anhydrite {, e.g. Keene's cement} · CPC title

• C04B2201/50

  for the mechanical strength · CPC title

• C04B28/142 Primary

  containing synthetic or waste calcium sulfate cements · CPC title

• C04B2103/0088

  Compounds chosen for their latent hydraulic characteristics, e.g. pozzuolanes · CPC title