# US 10,865,147 B2 · High strength concrete-like fluorogypsum-based blends and production methods

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- Number: US 10,865,147 B2
- Document ID: US10865147B2
- Status: Granted
- Kind: B2
- Application number: 16/129,515
- Filed: 2018-09-12
- Published: 2019-03-14
- Granted: 2020-12-15
- Earliest claimed: 2017-09-12
- Assignees: Board of Supervisors of Louisiana State University and Agricultural and Mechanical College
- Applicants: Michele Barbato; Yasser Bigdeli; Maria Teresa Gutierrez-Wing; Charles Davis Lofton
- Inventors: Michele Barbato; Yasser Bigdeli; Maria Teresa Gutierrez-Wing; Charles Davis Lofton
- Web page: https://patentgrep.com/patent/US10865147B2

## CPC

- C04B 28/16: containing anhydrite {, e.g. Keene's cement}
- C04B 7/02: Portland cement
- C04B 7/13: Mixtures thereof with inorganic cementitious materials, e.g. Portland cements
- C04B 7/1535: {with alkali metal containing activators, e.g. sodium hydroxide or waterglass}
- C04B 28/142: {containing synthetic or waste calcium sulfate cements}
- C04B 2103/0088: {Compounds chosen for their latent hydraulic characteristics, e.g. pozzuolanes}
- C04B 2201/50: for the mechanical strength
- C04B: LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE {(roofing granules E04D7/005)}; CERAMICS (devitrified glass-ceramics C03C10/00); REFRACTORIES; TREATMENT OF NATURAL STONE

## 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.

## Claims

### Claim 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.

### Claim 2 (depends on 1)

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.

### Claim 3 (depends on 1)

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.

### Claim 4 (depends on 1)

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

### Claim 5 (depends on 1)

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

### Claim 6 (depends on 1)

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

### Claim 7 (depends on 1)

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

### Claim 8 (depends on 6)

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