Influence of metakaolin characteristics on the mechanical properties of geopolymers
File(s)
Accepted version
Author(s)
Type
Journal Article
Abstract
The relationship between the properties of geopolymers and the characteristics of metakaolin samples used in their preparation has been investigated. Three commercial metakaolin samples have been characterised using 27Al-NMR to determine the coordination number of Al (IV, V and VI), and by acid and alkali dissolution to determine the reactive Si and Al content. The setting and mechanical properties of geopolymers formed from the metakaolin samples under identical conditions are reported, using Weibull statistics to analyse strength data. Although the metakaolin samples contained different levels of five coordinated aluminium (Al (V)) the mechanical properties of the geopolymers formed were very similar. The reactive fraction of metakaolinite determined by dissolution in 8 M NaOH provides the most relevant long-term indicator of geopolymer performance.
Date Issued
2013-09-18
Date Acceptance
2013-08-11
Citation
Applied Clay Science, 2013, 83-84, pp.308-314
ISSN
1872-9053
Publisher
Elsevier
Start Page
308
End Page
314
Journal / Book Title
Applied Clay Science
Volume
83-84
Copyright Statement
© 2013 Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/
Subjects
Science & Technology
Physical Sciences
Technology
Chemistry, Physical
Materials Science, Multidisciplinary
Mineralogy
Chemistry
Materials Science
CHEMISTRY, PHYSICAL
MATERIALS SCIENCE, MULTIDISCIPLINARY
MINERALOGY
Metakaolin
Geopolymer
Reactive content
Weibull statistics
ISOTHERMAL CONDUCTION CALORIMETRY
NUCLEAR-MAGNETIC-RESONANCE
FLY-ASH GEOPOLYMER
ALUMINOSILICATE GEOPOLYMERS
COMPRESSIVE STRENGTH
AMBIENT-TEMPERATURE
PART II
CERAMICS
CONCRETE
WEIBULL
Civil Engineering
04 Earth Sciences
09 Engineering
Publication Status
Published