Microstructural densification and CO₂ uptake promoted by the carbonation curing of belite-rich Portland cement
The present study investigates the effects of the belite content and carbonation curing on the physicochemical properties of cement mortar. The results provide new insight, demonstrating that a higher belite content in cement increases CO₂ uptake during the carbonation curing process and thus promotes microstructural densification. Carbonation-cured cement with a high alite content showed increased pore connectivity, while the cement with a high belite content experienced reduced pore connectivity and more instances of pore closure, resulting in a complex microstructure. The belite phase was mostly consumed by the carbonation reaction during the curing process, resulting in the production of calcite. As a result, the mechanical strength of the carbonation-cured belite-rich Portland cement mortar was significantly improved in comparison with that after normal curing for an identical period. In particular, the reaction of the belite phase influenced by hydration/carbonation interaction at an early age is discussed along with the experimental results.
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/issn/00088846
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Supplemental Notes:
- Abstract reprinted with permission from Elsevier.
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Authors:
- Jang, J G
- Lee, H K
- Publication Date: 2016-4
Language
- English
Media Info
- Media Type: Web
- Features: Figures; References; Tables;
- Pagination: pp 50-57
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Serial:
- Cement and Concrete Research
- Volume: 82
- Publisher: Elsevier
- ISSN: 0008-8846
- Serial URL: http://www.sciencedirect.com/science/journal/00088846
Subject/Index Terms
- TRT Terms: Carbonation; Concrete curing; Densification; Microstructure; Physicochemical properties; Portland cement
- Uncontrolled Terms: Belite
- Subject Areas: Highways; Materials;
Filing Info
- Accession Number: 01596077
- Record Type: Publication
- Files: TRIS
- Created Date: Apr 18 2016 12:31PM