Role of water in the synthesis of calcined kaolin-based geopolymer
Article
Article Title | Role of water in the synthesis of calcined kaolin-based geopolymer |
---|---|
ERA Journal ID | 4316 |
Article Category | Article |
Authors | Zhang, Zuhua (Author), Yao, Xiao (Author), Zhu, Huajun (Author) and Chen, Yue (Author) |
Journal Title | Applied Clay Science |
Journal Citation | 43 (2), pp. 218-223 |
Number of Pages | 6 |
Year | 2009 |
Place of Publication | Amsterdam, Netherlands |
ISSN | 0169-1317 |
1872-9053 | |
Digital Object Identifier (DOI) | https://doi.org/10.1016/j.clay.2008.09.003 |
Web Address (URL) | http://www.sciencedirect.com/science/article/pii/S0169131708002020# |
Abstract | Water plays an important role in the whole process of geopolymer synthesis. X-ray diffraction (XRD) and thermogravimetry (TG) showed that residual water depressed the activity development of calcined kaolin before stable crystalline phases formed as confirmed by the compressive strength. Reaction heat evolution measurement revealed that high liquid/solid ratio could accelerate the dissolution of raw materials and the hydrolysis of Si4+ and Al3+ compounds but hinder the polycondensation when OH− concentration is high enough as 12 mol/L. The effect of nonevaporable water on the strength variation of geopolymers was firstly analyzed. The results indicated that nonevaporable water was necessary to keep the strength stable and the optimum content was about 7.4%. |
Keywords | geopolymer; kaolin; nonevaporable water; thermogravimetry |
ANZSRC Field of Research 2020 | 400505. Construction materials |
340602. Chemical thermodynamics and energetics | |
340399. Macromolecular and materials chemistry not elsewhere classified | |
Public Notes | © 2008 Elsevier B.V. Permanent restricted access to published version in accordance with the copyright policy of the publisher. |
Byline Affiliations | Nanjing University of Technology, China |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q2875/role-of-water-in-the-synthesis-of-calcined-kaolin-based-geopolymer
1862
total views6
total downloads3
views this month0
downloads this month