Hyaloclastite, sideromelane or tachylite pozzolan-based geopolymer cement and concrete and method of making and using same

Patent metadata

Field	Value
Publication number	US-11702361-B2
Application number	US-202217590432-A
Country	US
Kind code	B2
Filing date	Feb 1, 2022
Priority date	May 15, 2017
Publication date	Jul 18, 2023
Grant date	Jul 18, 2023

Abstract

The invention comprises a cementitious material comprising a natural pozzolan selected from hyaloclastite, sideromelane or tachylite, wherein the natural pozzolan has a volume-based mean particle size of less than or equal to 40 μm. The cementitious material also comprising an aqueous alkaline activating solution suitable for forming a geopolymer. A method making a cementitious material is also disclosed.

First claim

What is claimed is:

1. A cementitious material comprising:
a natural pozzolan selected from hyaloclastite, sideromelane, tachylite or combinations or mixtures thereof, wherein the natural pozzolan has a volume-based mean particle size of less than or equal to approximately 40 μm; and
an aqueous alkaline activating solution suitable for forming a geopolymer, wherein the aqueous alkaline activating solution comprises:
a hydroxide; and
a water-soluble alkali metal silicate.

2. The cementitious material of claim 1 , wherein the natural pozzolan has a volume-based mean particle size of less than or equal to approximately 20 μm.

3. The cementitious material of claim 1 , wherein the natural pozzolan has a volume-based mean particle size of less than or equal to approximately 10 μm.

4. The cementitious material of claim 1 , wherein the natural pozzolan has a volume-based mean particle size of less than or equal to approximately 5 μm.

5. The cementitious material of claim 1 , wherein the hydroxide is NaOH, KOH or Ca(OH) 2 .

6. The cementitious material of claim 1 , wherein the hydroxide is NaOH or KOH.

7. The cementitious material of claim 2 , wherein the hydroxide is NaOH or KOH.

8. The cementitious material of claim 3 , wherein the hydroxide is NaOH or KOH.

9. The cementitious material of claim 4 , wherein the hydroxide is NaOH or KOH.

10. The cementitious material of claim 1 , wherein the water-soluble alkali metal silicate is sodium silicate or potassium silicate.

11. The cementitious material of claim 6 , wherein the water-soluble alkali metal silicate is sodium silicate or potassium silicate.

12. The cementitious material of claim 7 , wherein the water-soluble alkali metal silicate is sodium silicate or potassium silicate.

13. The cementitious material of claim 8 , wherein the water-soluble alkali metal silicate is sodium silicate or potassium silicate.

14. The cementitious material of claim 9 , wherein the water-soluble alkali metal silicate is sodium silicate or potassium silicate.

15. The cementitious material of claim 1 further comprising aggregate.

16. The cementitious material of claim 1 further comprising aggregate.

17. A cementitious material comprising:
a natural pozzolan selected from hyaloclastite, sideromelane, tachylite or combinations or mixtures thereof, wherein the natural pozzolan has a volume-based mean particle size of less than or equal to approximately 40 μm; and
an aqueous alkaline activating solution suitable for forming a geopolymer, wherein the aqueous alkaline activating solution comprises:
a hydroxide selected from NaOH or KOH; and
a water-soluble alkali metal silicate selected from sodium silicate or potassium silicate.

18. The cementitious material of claim 17 further comprising aggregate.

19. A method of making a cementitious material comprising:
combining a natural pozzolan and an aqueous alkaline activating solution suitable for forming a geopolymer;
wherein the natural pozzolan is selected from hyaloclastite, sideromelane, tachylite or combinations or mixtures thereof, wherein the natural pozzolan has a volume-based mean particle size of less than or equal to approximately 40 μm; and
wherein the aqueous alkaline activating solution comprises a hydroxide and a water-soluble alkali metal silicate.

20. The method of claim 19 , wherein the hydroxide is NaOH or KOH and the water-soluble alkali metal silicate is selected from sodium silicate or potassium silicate.

Assignees

• Ciuperca Romeo Ilarian

Inventors

• Ciuperca Romeo Ilarian

Classifications

• C04B7/12 Primary

  Natural pozzuolanas; Natural pozzuolana cements; {Artificial pozzuolanas or artificial pozzuolana cements other than those obtained from waste or combustion residues, e.g. burned clay; Treating inorganic materials to improve their pozzuolanic characteristics (cements containing slag C04B7/14)} · CPC title

• C04B7/02

  Portland cement · CPC title

• C04B7/51

  Hydrating · CPC title

• C04B12/005

  Geopolymer cements, e.g. reaction products of aluminosilicates with alkali metal hydroxides or silicates · CPC title

• C04B12/04

  Alkali metal or ammonium silicate cements {; Alkyl silicate cements; Silica sol cements; Soluble silicate cements (alkali metal silicates per se, their preparation C01B33/32; ammonium silicates per se, their preparation C01C1/00)} · CPC title