Binder chemistry of sodium carbonate-activated CFBC fly ash

Cited 2 time in webofscience Cited 0 time in scopus
  • Hit : 169
  • Download : 0
The use of circulating fluidized bed combustion in coal power plants is dramatically increasing, and the disposal of the resultant ash is a significant environmental concern. The present study investigated the binder chemistry of sodium carbonate-activated CFBC fly ash. Compressive strength tests showed that strength development was relatively faster in samples with 5% sodium carbonate. The main binder gel in samples with and without sodium carbonate was composed of AFt, AFm and C-S-H, while the formation and Al-substitution in C-S-H was enhanced by sodium carbonate-activation. At an excessive dosage of sodium carbonate, the formation of AFt was significantly hindered due to the precipitation of sodium sulfate, and a notable amount of AFm was formed in its place. The results obtained in this study fill a deficit in the understanding of fly ash activated with near-neutral salts, which are used extensively in several industrial applications, including alkali-activated cements.
Publisher
SPRINGER
Issue Date
2018-06
Language
English
Article Type
Article
Keywords

LOW-STRENGTH MATERIALS; BED COMBUSTION ASH; CO-FIRING COAL; CEMENTITIOUS PROPERTIES; PORTLAND-CEMENT; ASH/SLAG PASTE; PETROLEUM COKE; SLAG; EVOLUTION; PRODUCTS

Citation

MATERIALS AND STRUCTURES, v.51, no.3

ISSN
1359-5997
DOI
10.1617/s11527-018-1183-2
URI
http://hdl.handle.net/10203/242527
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 2 items in WoS Click to see citing articles in records_button

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0