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Oh, Jae Eun
Nano-AIMS 구조재료 연구실
Research Interests
  • Concrete Materials, Construction Materials, Cementless Binders

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The importance of the network-modifying element content in fly ash as a simple measure to predict its strength potential for alkali-activation

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Title
The importance of the network-modifying element content in fly ash as a simple measure to predict its strength potential for alkali-activation
Author
Oh, Jae EunJun, YubinJeong, YeonungMonteiro, Paulo J.M.
Issue Date
2015-03
Publisher
ELSEVIER SCI LTD
Citation
CEMENT & CONCRETE COMPOSITES, v.57, pp.44 - 54
Abstract
Six different Class F fly ashes were examined to identify the material properties that determine the strength development in geopolymerization. All of the fly ashes displayed typical features of Class F fly ash in chemical and mineral composition, amorphous phase (glass) content, and X-ray diffraction pattern profile; however, the strength developments of the ashes were quite different from each other. The results suggest that the strength is higher under the following configuration: greater content of network modifying elements, greater glass content, lower silicon content, lower intensity of quartz-related 29Si NMR peak, and higher fraction of Al(IV) in the 27Al NMR spectrum. Among the possibilities, the network-modifying elemental content may be the simplest and most accurate measure for strength development of alkali activation of fly ash.
URI
https://scholarworks.unist.ac.kr/handle/201301/9740
URL
https://www.sciencedirect.com/science/article/pii/S0958946514002212?via%3Dihub
DOI
10.1016/j.cemconcomp.2014.12.001
ISSN
0958-9465
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