Abstract
Moving toward carbon neutrality in the construction industry involves utilizing CO2 to produce construction materials. CO2 curing of cement-based materials induces carbonation at an early age, which enhances strength and performance. A new process for the CO2 curing is proposed using CO2-dissolved curing water, which needs no massive CO2-gas chamber encasing cement-based materials in mild pressure. Gaseous CO2 was dissolved in 1 M aqueous KOH solution beforehand, and mortar samples made with ground-granulated blast furnace slag were submerged and cured. The CO2-water curing for 3 days carbonated the samples but was not beneficial for their 3-day strengths. Successive moist curing resulted in further hydration of the mortar with carbonate seeds. Finally, the samples' strengths at 28 days were enhanced, and their CO2 uptake was as much as the conventional CO2 curing provides.
Recommended Citation
S. H. Han et al., "The use of Alkaline CO2 Solvent for the CO2 Curing of Blast-furnace Slag Mortar," Construction and Building Materials, vol. 342, article no. 127977, Elsevier, Aug 2022.
The definitive version is available at https://doi.org/10.1016/j.conbuildmat.2022.127977
Department(s)
Civil, Architectural and Environmental Engineering
Publication Status
Open Access
Keywords and Phrases
Alkali-activated slag; CCUS; CO curing 2; Direct aqueous carbonation
International Standard Serial Number (ISSN)
0950-0618
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2025 Elsevier, All rights reserved.
Publication Date
01 Aug 2022
Comments
Ministry of Land, Infrastructure and Transport, Grant None