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Lee, Changha
Advanced Redox Technology (ART) Lab
Research Interests
  • Water Treatment, Advanced Oxidation/Reduction, Water Chemistry, Environmental Catalyst

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Use of CaO as an activator for producing a price-competitive non-cement structural binder using ground granulated blast furnace slag

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Title
Use of CaO as an activator for producing a price-competitive non-cement structural binder using ground granulated blast furnace slag
Author
Kim, Min SikJun, YubinLee, ChanghaOh, Jae Eun
Issue Date
2013-12
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Citation
CEMENT AND CONCRETE RESEARCH, v.54, pp.208 - 214
Abstract
The use of calcium oxide (CaO) demonstrates a superior potential for the activation of ground granulated blast furnace slag (GGBFS), and it produces a higher mechanical strength than calcium hydroxide [Ca(OH)2]. The mechanical strength differences between CaO- and Ca(OH)2-activated GGBFS binders are explored using isothermal calorimetry, powder X-ray diffraction, thermogravimetric and differential thermal analysis (TGA and DTA) as well as compressive strength testing. Calcium silicate hydrate (C-S-H), Ca(OH)2 and a hydrotalcite-like phase are found as reaction products in all samples. The TGA and DTA results indicate that the use of CaO produces more C-S-H, although this is not likely to be the primary cause of higher strength development in the CaO-activated GGBFS. Rather, other factors such as porosity may govern the strength at a higher order of magnitude. Significant reduction of Ca(OH)2 occurs only with the use of Ca(OH)2, followed by the formation of carbonate (CaCO3), indicating carbonation.
URI
https://scholarworks.unist.ac.kr/handle/201301/9709
URL
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=84885410164
DOI
10.1016/j.cemconres.2013.09.011
ISSN
0008-8846
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