Aqueous carbonation curing method of binder composition using carbon dioxide absorbent

Patent metadata

Field	Value
Publication number	US-12428343-B2
Application number	US-202217739346-A
Country	US
Kind code	B2
Filing date	May 9, 2022
Priority date	May 10, 2021
Publication date	Sep 30, 2025
Grant date	Sep 30, 2025

Abstract

An aqueous carbonation curing method of a binder composition according to an exemplary embodiment of the present invention includes: forming a binder composition; curing the binder composition in a negative pressure state (pre-curing step); water curing the pre-cured binder composition in an aqueous carbon dioxide absorbent solution (first curing step); and curing the first-cured binder composition in a 95% or more relative humidity atmosphere (second curing step).

First claim

What is claimed is:

1. A curing method of a binder composition, the method comprising:
forming a binder composition;
curing the binder composition in a negative pressure state (pre-curing step);
water curing the pre-cured binder composition in an aqueous carbon dioxide absorbent solution (first curing step); and
curing the first-cured binder composition in a 95% or more relative humidity atmosphere (second curing step),
wherein in first curing step, the aqueous carbon dioxide absorbent solution is dissolved with carbon dioxide for 5 minutes to 1 hour, and
wherein in the first curing, the aqueous carbon dioxide absorbent solution includes an alkali activator including one or more of an aqueous alkanolamine solution including one or more of monoethanolamine (MEA), diethanolamine (DEA), and triethanolamine (TEA), or an alkaline aqueous solution including one or more of KOH and Na 2 SiO 3 .

2. The curing method of a binder composition of claim 1 , wherein:
the binder composition includes one or more of Portland cement, Class C fly ash, and ground granulated blast furnace slag; and one or more of water, liquid sodium silicate, an aqueous potassium hydroxide solution, and an aqueous sodium hydroxide solution.

3. The curing method of a binder composition of claim 2 , wherein:
the binder composition includes 30 to 60 parts by weight of one of water, the liquid sodium silicate, the aqueous potassium hydroxide solution, and the aqueous sodium hydroxide solution, with respect to 100 parts by weight of one or more of the Portland cement, the Class C fly ash, and the ground granulated blast furnace slag.

4. The curing method of a binder composition of claim 1 , wherein:
the binder composition includes the Portland cement; a bottom ash fine aggregate; and water.

5. The curing method of a binder composition of claim 4 , wherein:
the binder composition includes 100 to 300 parts by weight of the bottom ash fine aggregate and 30 to 100 parts by weight of water, with respect to 100 parts by weight of the Portland cement.

6. The curing method of a binder composition of claim 1 , wherein:
the binder composition includes 100 to 500 parts by weight of silica and 10 to 50 parts by weight of the liquid sodium silicate, with respect to 100 parts by weight of one or more of the ground granulated blast furnace slag and the Class C fly ash.

7. The curing method of a binder composition of claim 6 , wherein:
a weight ratio of SiO 2 to Na 2 O in the liquid sodium silicate is 2.0 to 3.5.

8. The curing method of a binder composition of claim 1 , further comprising:
before the pre-curing, injecting the binder composition into a mold and performing molding (molding step).

9. The curing method of a binder composition of claim 1 , wherein:
in the forming, the binder composition is compressed to 0.5 MPa or more.

10. The curing method of a binder composition of claim 1 , wherein:
the pre-curing is performed at an atmospheric pressure of less than 0 kPa and −100 kPa or more.

11. The curing method of a binder composition of claim 1 , wherein:
0.5 to 50 wt % of the alkanolamine is included in the aqueous carbon dioxide absorbent solution.

12. The curing method of a binder composition of claim 1 , wherein:
the aqueous carbon dioxide absorbent solution includes a primary alkanolamine.

13. The curing method of a binder composition of claim 1 , wherein:
in the first curing, a concentration of the alkali activator in the aqueous carbon dioxide absorbent solution is 1 to 5 M.

14. The curing method of a binder composition of claim 1 , wherein:
the pre-curing, the first curing, and the second curing are performed at a temperature of 15 to 50° C., respectively.

Assignees

• Korea Advanced Inst Sci & Tech

Inventors

• Kim Jae Hong
• Han Seong Ho
• Jun Yubin

Classifications

• C04B40/0231

  Carbon dioxide hardening · CPC title

• C04B2111/00017

  Aspects relating to the protection of the environment · CPC title

• C04B28/021

  Ash cements, e.g. fly ash cements (fly ash as filler C04B18/08); Cements based on incineration residues, e.g. alkali-activated slags from waste incineration (alkali-activated combustion residues as such C04B7/243; mixtures of the lime-pozzuolane type C04B28/18); Kiln dust cements · CPC title

• C04B2103/0078

  Sorbent materials · CPC title

• C04B20/107

  Acids or salts thereof · CPC title