	US 12,428,343 B2
	Aqueous carbonation curing method of binder composition using carbon dioxide absorbent
Jae Hong Kim, Daejeon (KR); Seong Ho Han, Daejeon (KR); and Yubin Jun, Daejeon (KR)
Assigned to KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY, Daejeon (KR)
Filed by KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY, Daejeon (KR)
Filed on May 9, 2022, as Appl. No. 17/739,346.
Claims priority of application No. 10-2021-0060310 (KR), filed on May 10, 2021; and application No. 10-2021-0060311 (KR), filed on May 10, 2021.
Prior Publication US 2022/0356116 A1, Nov. 10, 2022
Int. Cl. C04B 28/04 (2006.01); C04B 28/02 (2006.01); C04B 103/00 (2006.01); C04B 111/00 (2006.01)

CPC C04B 28/04 (2013.01) [C04B 28/021 (2013.01); C04B 2103/0078 (2013.01); C04B 2111/00017 (2013.01)]

14 Claims

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 Na₂SiO₃.