Geopolymerization process of alkali-metakaolinite characterized by isothermal calorimetry
Article
Article Title | Geopolymerization process of alkali-metakaolinite characterized by isothermal calorimetry |
---|---|
ERA Journal ID | 1511 |
Article Category | Article |
Authors | Yao, Xiao (Author), Zhang, Zuhua (Author), Zhu, Huajun (Author) and Chen, Yue (Author) |
Journal Title | Thermochimica Acta |
Journal Citation | 493 (1/2), pp. 49-54 |
Number of Pages | 6 |
Year | 2009 |
Place of Publication | Amsterdam, Netherlands |
ISSN | 0040-6031 |
1872-762X | |
Digital Object Identifier (DOI) | https://doi.org/10.1016/j.tca.2009.04.002 |
Web Address (URL) | http://www.sciencedirect.com/science/article/pii/S0040603109001907# |
Abstract | The geopolymerization process of metakaolinite activated by alkali and alkali silicate solutions was revealed. The effects of alkali concentration, modulus of alkali silicate solution and reaction temperature on geopolymerization were studied systematically by isothermal calorimetry, as well as X-ray diffraction and 27Al/29Si MAS NMR. Results show that the geopolymerization process of metakaolinite under alkali activation condition can be reasonably supposed into three stages: (I) destruction, (II) polymerization and (III) stabilization. The rate of geopolymerization in KOH solution is higher than in NaOH solution and reaches the maximum in 15 mol/L KOH solution during stage II. The extent of geopolymerization increases with increasing of alkali content regardless of the existence of silicate anions in activator. |
Keywords | calorimetry; geopolymer; geopolymerization; metakaolinite |
ANZSRC Field of Research 2020 | 340306. Polymerisation mechanisms |
400505. Construction materials | |
401609. Polymers and plastics | |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | Nanjing University of Technology, China |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q2874/geopolymerization-process-of-alkali-metakaolinite-characterized-by-isothermal-calorimetry
1882
total views6
total downloads0
views this month0
downloads this month