Production of nepheline/quartz ceramics from geopolymer mortars
File(s)
Accepted version
Author(s)
Kuenzel, C
Grover, LM
Vandeperre, L
Boccaccini, AR
Cheeseman, CR
Type
Journal Article
Abstract
This research has investigated the mechanical properties and microstructure of metakaolin derived geopolymer mortars containing 50% by weight of silica sand, after exposure to temperatures up to 1200 °C. The compressive strength, porosity and microstructure of the geopolymer mortar samples were not significantly affected by temperatures up to 800 °C. Nepheline (NaAlSiO4) and carnegieite (NaAlSiO4) form at 900 °C in the geopolymer phase and after exposure to 1000 °C the mortar samples were transformed into polycrystalline nepheline/quartz ceramics with relatively high compressive strength (∼275 MPa) and high Vickers hardness (∼350 HV). Between 1000 and 1200 °C the samples soften with gas evolution causing the formation of closed porosity that reduced sample density and limited the mechanical properties.
Date Issued
2012-10-01
Date Acceptance
2012-08-21
Citation
Journal of the European Ceramic Society, 2012, 33 (2), pp.251-258
ISSN
1873-619X
Publisher
Elsevier
Start Page
251
End Page
258
Journal / Book Title
Journal of the European Ceramic Society
Volume
33
Issue
2
Copyright Statement
© 2012 Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/
Subjects
Science & Technology
Technology
Materials Science, Ceramics
Materials Science
MATERIALS SCIENCE, CERAMICS
Sintering
Mechanical properties
Ceramic
Geopolymer
Final microstructure
METAKAOLIN-BASED GEOPOLYMERS
PART I
COMPRESSIVE STRENGTH
PHYSICAL EVOLUTION
THERMAL EVOLUTION
MATRIX COMPOSITES
FLY-ASH
RESISTANCE
STABILITY
CONCRETE
Materials
0912 Materials Engineering
Publication Status
Published