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

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The evolution of strength and crystalline phases for alkali-activated ground blast furnace slag and fly ash-based geopolymers

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Title
The evolution of strength and crystalline phases for alkali-activated ground blast furnace slag and fly ash-based geopolymers
Author
Oh, Jae EunMonteiro, Paulo J. M.Jun, Ssang SunChoi, SejinClark, Simon M.
Keywords
Alkali-activated cement (D); Fly ash (D); Geopolymer (D); Granulated blast furnace slag (D); X-ray diffraction (B)
Issue Date
2010-02
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Citation
CEMENT AND CONCRETE RESEARCH, v.40, no.2, pp.189 - 196
Abstract
The increase in strength and evolution of crystalline phases in inorganic polymer cement, made by the alkali activation of slag, Class C and Class F fly ashes, was followed using compressive strength test and synchrotron X-ray diffraction. In order to increase the crystallinity of the product the reactions were carried out at 80 °C. We found that hydrotalcite formed in both the alkali-activated slag cements and the fly ash-based geopolymers. Hydroxycancrinite, one member of the ABC-6 family of zeolites, was found only in the fly ash geopolymers. Assuming that the predominantly amorphous geopolymer formed under ambient conditions relates to the crystalline phases found when the mixture is cured at high temperature, we propose that the structure of this zeolitic precursor formed in Na-based high alkaline environment can be regarded as a disordered form of the basic building unit of the ABC-6 group of zeolites which includes poly-types such as hydroxycancrinite, hydroxysodalite and chabazite-Na.
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DOI
10.1016/j.cemconres.2009.10.010
ISSN
0008-8846
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