Using fly ash to partially substitute metakaolin in geopolymer synthesis
Article
Article Title | Using fly ash to partially substitute metakaolin in geopolymer synthesis |
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ERA Journal ID | 4316 |
Article Category | Article |
Authors | Zhang, Zuhua (Author), Wang, Hao (Author), Zhu, Yingcan (Author), Reid, Andrew (Author), Provis, John L. (Author) and Bullen, Frank (Author) |
Journal Title | Applied Clay Science |
Journal Citation | 88-89, pp. 194-201 |
Number of Pages | 8 |
Year | 2014 |
Place of Publication | Amsterdam, Netherlands |
ISSN | 0169-1317 |
1872-9053 | |
Digital Object Identifier (DOI) | https://doi.org/10.1016/j.clay.2013.12.025 |
Web Address (URL) | http://www.sciencedirect.com/science/article/pii/S0169131713004420 |
Abstract | Metakaolin-based geopolymers containing between 0 and 40% fly ash were prepared, to study the influence of fly ash substitution on the reaction process and products. At constant liquid/solid ratio, the partial replacement of metakaolin by fly ash reduces the rate of reaction, but the reaction continues for an extended duration and so is still able to achieve a relatively high extent of reaction and provide a comparable 28-day compressive strength when the replacement is less than 30%. The replacement of 10% of the metakaolin by fly ash gives an increased reaction extent (as measured by isothermal conduction calorimetry), and also a higher 28-day compressive strength, by 15%. The porosity of the geopolymer increases with the level of fly ash replacement, and pore refinement and ongoing reaction of fly ash particles during the first month of curing are also apparent. |
Keywords | geopolymer; fly ash; metakaolin; microstructure; calorimetry |
ANZSRC Field of Research 2020 | 400505. Construction materials |
401601. Ceramics | |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | Centre of Excellence in Engineered Fibre Composites |
Halok Engineering, Australia | |
University of Melbourne | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q2530/using-fly-ash-to-partially-substitute-metakaolin-in-geopolymer-synthesis
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