High-strength concrete and method of producing same

Patent metadata

Field	Value
Publication number	US-12037286-B2
Application number	US-202318150234-A
Country	US
Kind code	B2
Filing date	Jan 5, 2023
Priority date	Jan 7, 2022
Publication date	Jul 16, 2024
Grant date	Jul 16, 2024

Abstract

There is described a high-strength concrete generally having: about 100 parts by weight of cement; about 60 to about 360 parts by weight of fine aggregates; about 90 to about 230 parts by weight of mineral powder having a diameter D50 below 150 μm; about 0.1 to about 25 parts by weight of superplasticizer; and about 20 to about 65 parts by weight of water, the high-strength concrete has a cement content less than about 500 kg/m3 and having a compressive strength after 28 curing days of about 55 MPa or greater.

First claim

What is claimed is:

1. A high-strength concrete comprising: 100 parts by weight of cement; 60 to 360 parts by weight of fine aggregates having a D50 diameter above 100 um; 90 to 230 parts by weight of mineral powder having a D50 diameter below 150 μm; 0.1 to 25 parts by weight of superplasticizer; and 20 to 65 parts by weight of water, the high-strength concrete has a cement content less than 500 kg/m 3 and has a compressive strength after 28 curing days of 55 MPa or greater, the mineral powder comprising igneous rock powder.

2. The high strength concrete of claim 1 wherein the mineral powder includes above 20% by weight of one or more materials having a D50 diameter above the D50 diameter of the cement, and above 20% by weight of one or more materials having a D50 diameter below the D50 diameter of the cement.

3. The high strength concrete of claim 1 wherein the mineral powder has a D50 diameter within 30% of a D50 diameter of the cement and includes igneous rock powder having a D50 diameter more than 5% above the D50 diameter of the cement, and at least one other material having a D50 diameter more than 5% below the D50 diameter of the cement.

4. The high strength concrete of claim 1 wherein the D50 diameter of the mineral powder is below 100 μm.

5. The high-strength concrete of claim 1 wherein the cement content is less than 490 kg/m 3 .

6. The high-strength concrete of claim 1 wherein the parts by weight of mineral powder range between 100 and 220.

7. The high-strength concrete of claim 1 further comprising at least 0.2% by volume of reinforcing fibers.

8. The high-strength concrete of claim 7 wherein the reinforcing fibers comprise steel fibers.

9. The high-strength concrete of claim 8 wherein the steel fibers have an aspect ratio ranging between 10 and 200.

10. The high-strength concrete of claim 1 wherein the cement has an alkali concentration of less than 0.6% weight with respect to a total weight of the cement.

11. The high-strength concrete of claim 1 wherein the mineral powder comprises at least 10 parts by weight of igneous rock powder.

12. The high-strength concrete of claim 1 wherein the mineral powder comprises at least igneous rock powder and limestone powder.

13. The high-strength concrete of claim 1 wherein a portion of the mineral powder and a portion of the water are provided in the form of a sludge.

14. A high-strength concrete mix comprising: 100 parts by weight of cement; 60 to 360 parts by weight of fine aggregates; and 90 to 230 parts by weight of mineral powder having a diameter D50 below 150 μm, which, when mixed with 20 to 65 parts by weight of water and 0.1 to 25 parts by weight of superplasticizer, forms a high-strength concrete having a cement content less than 500 kg/m 3 and having a compressive strength after 28 curing days of 55 MPa or greater, the mineral powder comprising igneous rock powder.

15. The high-strength concrete mix of claim 14 wherein the parts by weight of mineral powder ranges between 100 and 220.

16. A method of producing a batch of high-strength concrete, the method comprising: mixing concrete ingredients into a drum, the concrete ingredients having 100 parts by weight of cement, 60 to 360 parts by weight of fine aggregates, 90 to 230 parts by weight of mineral powder having a diameter D50 below 150 μm, 0.1 to 25 parts by weight of superplasticizer, and 20 to 65 parts by weight of water, with a cement content less than 500 kg/m 3 of cement, the mineral powder comprising igneous rock powder.

17. The method of claim 16 further comprising, prior to said mixing, drying a mineral powder containing sludge thereby obtain said mineral powder.

Assignees

• Univ Laval

Inventors

• Sorelli Luca
• Bouchard David

Classifications

• Y02W30/91

  Use of waste materials as fillers for mortars or concrete · CPC title

• C04B28/04 Primary

  Portland cements · CPC title

• C04B14/048

  Granite · CPC title

• C04B14/285

  Marble · CPC title

• C04B2103/32

  Superplasticisers · CPC title