Effect of pre-carbonation hydration on long-term hydration of carbonation-cured cement-based materials
Authors:
- Duo Zhang,
- Xinhua Cai,
- Beata Eliza Jaworska
Abstract
In the context of CO2 storage in construction materials, early-age carbonation curing of cement-based materials has been extensively studied in recent decades. Here, the effect of cement chemical and mineralogical alterations caused by initial hydration before early-age carbonation (i.e., pre-carbonation hydration) on subsequent hydration and strength development after early-age carbonation (i.e., post-carbonation hydration) is studied as a new parameter for controlling the curing process. Cement pastes were examined immediately after early-age carbonation using thermogravimetric analysis (TGA) and at 28 d by means of TGA, X-ray diffraction and vapor sorption, and were further associated with mortar strength development. The efficiency of early-age carbonation was found to noticeably decrease by delaying CO2 exposure. The post-carbonation hydration, however, was enhanced under the same condition and formed higher 28-d strength and bound water content compared to the non-carbonated reference. The use of limestone cement emphasized this observation and tended to advance its occurrence at shorter pre-carbonation hydrations. It is inferred that carbonation introduced after the late deceleration period of cement hydration can potentially enable a nucleation seeding effect to promote long-term hydration. The findings of this study confirm the importance of controlling pre-carbonation hydration age as a critical parameter for synergistically optimizing CO2 sequestration and technical properties of CO2-embodied materials.
- Record ID
- WUT3c557e43462f49b99923eccfdefd6224
- Author
- Journal series
- Construction and Building Materials, ISSN 0950-0618, e-ISSN 1879-0526
- Issue year
- 2020
- Vol
- 231
- Pages
- 1-11
- Publication size in sheets
- 0.50
- Article number
- 117122
- Keywords in English
- Portland cement, Hydration, Carbonation curing, CO2 sequestration
- ASJC Classification
- ; ;
- DOI
- DOI:10.1016/j.conbuildmat.2019.117122 Opening in a new tab
- Language
- (en) English
- Score (nominal)
- 140
- Score source
- journalList
- Score
- = 140.0, 04-05-2022, ArticleFromJournal
- Publication indicators
- = 17; = 13; = 18; : 2018 = 2.369; : 2020 (2 years) = 6.141 - 2020 (5 years) =6.841
- Citation count
- 20
- Uniform Resource Identifier
- https://repo.pw.edu.pl/info/article/WUT3c557e43462f49b99923eccfdefd6224/
- URN
urn:pw-repo:WUT3c557e43462f49b99923eccfdefd6224
* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or PerishOpening in a new tab system.