Manufactured natural pozzolan, improved manufactured natural pozzolan-based cement and method of making and using same

Patent metadata

Field	Value
Publication number	US-10155695-B2
Application number	US-201715724204-A
Country	US
Kind code	B2
Filing date	Oct 3, 2017
Priority date	Oct 4, 2016
Publication date	Dec 18, 2018
Grant date	Dec 18, 2018

Abstract

The present invention comprises a product. The product comprises a first mineral in particulate form and having a first pozzolanic reactivity and a second mineral in particulate form and having a second pozzolanic reactivity greater than the first reactivity, wherein the surface of at least some of the particles of the first mineral is at least partially covered with particles of the second mineral. A method of making the composition of the present invention is also disclosed.

First claim

What is claimed is:

1. A process comprising combining a first mineral in particulate form having a volume-based average particle size of approximately 15 to approximately 60 μm and having a first pozzolanic reactivity with a second mineral in particulate form having a volume-based average particle size of approximately 0.1 to approximately 10 μm and having a second pozzolanic reactivity greater than the first mineral pozzolanic reactivity, wherein the surface of at least some of the particles of the first mineral is at least partially covered with particles of the second mineral;
wherein the first mineral comprises:
approximately 45% to approximately 55% by weight SiO 2 approximately 5% to approximately 15% Al 2 O 3 , approximately 5% to approximately 20% Fe 2 O 3 and approximately 1% to approximately 20% CaO; and
an amorphous content of less than or equal to 25% by weight and approximately 5% to approximately 60% by weight Plagioclase Feldspar; and

wherein the second mineral comprises metakaolin.

2. The process of claim 1 further comprising combining the first and second minerals with a hydraulic cement.

3. The process of claim 2 , wherein the hydraulic cement is portland cement.

4. The process of claim 1 , wherein the first mineral has a pozzolanic reactivity of less than 100% as measured by ASTM C-618.

5. The process of claim 1 , wherein the second mineral has a pozzolanic reactivity of greater than 100% as measured by ASTM C-618.

6. A process comprising combining a first mineral in particulate form having a volume-based average particle size of approximately 15 to approximately 60 μm and having a first pozzolanic reactivity with a second mineral in particulate form having a volume-based average particle size of approximately 0.1 to approximately 10 μm and having a second pozzolanic reactivity greater than the first mineral pozzolanic reactivity, wherein the surface of at least some of the particles of the first mineral is at least partially covered with particles of the second mineral;
wherein the first mineral comprises:
approximately 45% to approximately 55% by weight SiO 2 approximately 5% to approximately 15% Al 2 O 3 , approximately 5% to approximately 20% Fe 2 O 3 and approximately 1% to approximately 20% CaO; and
an amorphous content of less than or equal to 25% by weight and approximately 5% to approximately 60% by weight Plagioclase Feldspar; and

wherein the second mineral comprises silica fume.

7. The process of claim 6 further comprising combining the first and second minerals with a hydraulic cement.

8. The process of claim 7 , wherein the hydraulic cement is portland cement.

9. The process of claim 6 , wherein the first mineral has a pozzolanic reactivity of less than 100% as measured by ASTM C-618.

10. The process of claim 6 , wherein the second mineral has a pozzolanic reactivity of greater than 100% as measured by ASTM C-618.

11. A process comprising combining a first mineral in particulate form having a volume-based average particle size of approximately 15 to approximately 60 μm and having a first pozzolanic reactivity with a second mineral in particulate form having a volume-based average particle size of approximately 0.1 to approximately 10 μm and having a second pozzolanic reactivity greater than the first mineral pozzolanic reactivity, wherein the surface of at least some of the particles of the first mineral is at least partially covered with particles of the second mineral;
wherein the first mineral comprises:
approximately 45% to approximately 55% by weight SiO 2 approximately 5% to approximately 15% Al 2 O 3 , approximately 5% to approximately 20% Fe 2 O 3 and approximately 1% to approximately 20% CaO; and
an amorphous content of less than or equal to 25% by weight and approximately 5% to approximately 60% by weight Plagioclase Feldspar; and

wherein the second mineral comprises an aluminosilicate.

12. The process of claim 11 further comprising combining the first and second minerals with a hydraulic cement.

13. The process of claim 12 , wherein the hydraulic cement is portland cement.

14. The process of claim 11 , wherein the first mineral has a pozzolanic reactivity of less than 100% as measured by ASTM C-618.

15. The process of claim 11 , wherein the second mineral has a pozzolanic reactivity of greater than 100% as measured by ASTM C-618.

Assignees

• Ciuperca Romeo Ilarian

Inventors

• Ciuperca Romeo Ilarian

Classifications

• C04B20/1074

  Silicates, e.g. glass · CPC title

• C04B28/04 Primary

  Portland cements · CPC title

• C04B40/0042

  Powdery mixtures · CPC title

• C04B2111/00215

  Mortar or concrete mixtures defined by their oxide composition · CPC title

• C04B20/1066

  Oxides, Hydroxides · CPC title