Improved Reactivity of Fly Ash-Slag Geopolymer by the Addition of Silica Fume
Joint Authors
Koh, Kyung-Taek
Lee, N. K.
An, G. H.
Ryu, G. S.
Source
Advances in Materials Science and Engineering
Issue
Vol. 2016, Issue 2016 (31 Dec. 2016), pp.1-11, 11 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2016-03-16
Country of Publication
Egypt
No. of Pages
11
Abstract EN
This study investigates the improved reactivity of a geopolymer based on a combination of fly ash and blast furnace slag (BFS) by the addition of silica fume.
The geopolymer was synthesized by activating a mixture of fly ash, BFS, and three different types of silica fume with alkali activator.
X-ray diffraction (XRD) and inductively coupled plasma-optical emission spectroscopy (ICP-OES) were utilized to characterize the reaction.
The silicate structure was also analyzed by nuclear magnetic resonance (NMR) spectroscopy.
From these results, it was found that the replacement of fly ash with the silica fume led to a significant decrease in the Q 4 (1Al) and an increase in the Q 4 (2Al), Q 4 (3Al), and Q 4 (4Al).
The Si/Al ratio of the aluminosilicate gel was relatively constant, ranging from 2.0 to 2.6, while the Si/Al ratio of the C-S-H gel increased with the addition of silica fume.
Therefore, some of the Al dissolved from the slag contributed to the formation of aluminosilicate gel, and the remnant slag particles mostly participated in the formation of the C-(A)-S-H gel with a decrease in the Q 2 (1Al).
The increase in the reactivity of slag caused by the addition of silica fume was attributed to the reaction of the Al in the slag with the silica fume.
American Psychological Association (APA)
Lee, N. K.& An, G. H.& Koh, Kyung-Taek& Ryu, G. S.. 2016. Improved Reactivity of Fly Ash-Slag Geopolymer by the Addition of Silica Fume. Advances in Materials Science and Engineering،Vol. 2016, no. 2016, pp.1-11.
https://search.emarefa.net/detail/BIM-1096036
Modern Language Association (MLA)
Lee, N. K.…[et al.]. Improved Reactivity of Fly Ash-Slag Geopolymer by the Addition of Silica Fume. Advances in Materials Science and Engineering No. 2016 (2016), pp.1-11.
https://search.emarefa.net/detail/BIM-1096036
American Medical Association (AMA)
Lee, N. K.& An, G. H.& Koh, Kyung-Taek& Ryu, G. S.. Improved Reactivity of Fly Ash-Slag Geopolymer by the Addition of Silica Fume. Advances in Materials Science and Engineering. 2016. Vol. 2016, no. 2016, pp.1-11.
https://search.emarefa.net/detail/BIM-1096036
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1096036