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

Patent metadata

Field	Value
Publication number	US-11236018-B2
Application number	US-202016995369-A
Country	US
Kind code	B2
Filing date	Aug 17, 2020
Priority date	May 15, 2017
Publication date	Feb 1, 2022
Grant date	Feb 1, 2022

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.

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 aqueous alkaline activating solution comprises a hydroxide selected from NaOH, KOH, CaOH, and other minerals or compounds having reactive hydroxyl groups.

6. The cementitious material of claim 5 , wherein the hydroxide is sodium hydroxide or potassium hydroxide.

7. The cementitious material of claim 5 , wherein the aqueous alkaline activating solution further comprises a water-soluble alkali metal silicate.

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

9. The cementitious material of claim 1 , wherein the aqueous alkaline activating solution comprises sodium hydroxide or potassium hydroxide and sodium silicate or potassium silicate.

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

11. A cementitious-based material comprising:
aggregate;
hyaloclastite having a volume-based mean particle size of less than or equal to approximately 40 μm; and
an alkaline activating solution comprising:
sodium hydroxide or potassium hydroxide; and
water.

12. The cementitious-based material of claim 11 , wherein the natural pozzolan has a volume-based mean particle size of less than or equal to approximately 20 μm.

13. The cementitious-based material of claim 11 , wherein the natural pozzolan has a volume-based mean particle size of less than or equal to approximately 10 μm.

14. The cementitious-based material of claim 11 , wherein the natural pozzolan has a volume volume-based mean size of less than or equal to approximately 5 μm.

15. The cementitious-based material of claim 11 further comprising a water-soluble alkali metal silicate.

16. The cementitious-based material of claim 15 , wherein the water-soluble alkali metal silicate is sodium silicate or potassium silicate.

17. A cementitious-based material comprising:
aggregate;
hyaloclastite having a volume-based mean particle size of less than or equal to approximately 40 μm; and
an alkaline activating solution suitable for forming a geopolymer comprising:
a compound having a reactive hydroxyl group; and
water.

18. The cementitious-based material of claim 17 , wherein the compound having a reactive hydroxyl group is NaOH, KOH or CaOH.

19. The cementitious-based material of claim 18 , wherein the natural pozzolan has a volume-based mean particle size of less than or equal to approximately 20 μm.

20. The cementitious-based material of claim 18 , wherein the natural pozzolan has a volume-based mean particle size of less than or equal to approximately 10 μm.

Assignees

• Ciuperca Romeo Ilarian

Inventors

• Ciuperca Romeo Ilarian

Classifications

• 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

• C04B14/14 Primary

  Minerals of vulcanic origin {(granite C04B14/048)} · CPC title

• C04B28/18

  containing mixtures of the silica-lime type · CPC title

• 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