Stable conversion of metastable hydrates in calcium aluminate cement by early carbonation curing

Cited 9 time in webofscience Cited 0 time in scopus
  • Hit : 347
  • Download : 0
The hydration of monocalcium aluminate in calcium aluminate cement forms metastable products such as CAH(10) and C(2)AH(8), which undergo phase transformations into stable products, inducing significant volumetric instability. The present study adopted carbonation curing, in which a calcium aluminate cement paste is exposed to a CO2 concentration of 10%. X-ray diffractometry, thermogravimetry and mercury intrusion porosimetry were conducted on the carbonation-cured and on reference samples at 28 days. The results showed that the metastable phases in the carbonation-cured sample were converted into stable phases and calcium carbonate polymorphs without inducing any significant change in the pore structure. This study may provide new insight into innovative means of avoiding the unstable conversion of hydrates in calcium aluminate cement by utilizing CO2 collected from industrial sources.
Publisher
ELSEVIER SCI LTD
Issue Date
2017-10
Language
English
Article Type
Article
Citation

JOURNAL OF CO2 UTILIZATION, v.21, pp.224 - 226

ISSN
2212-9820
DOI
10.1016/j.jcou.2017.07.002
URI
http://hdl.handle.net/10203/226617
Appears in Collection
CE-Journal Papers(저널논문)
Files in This Item
There are no files associated with this item.
This item is cited by other documents in WoS
⊙ Detail Information in WoSⓡ Click to see webofscience_button
⊙ Cited 9 items in WoS Click to see citing articles in records_button

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0