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Titel
Micro-CT-based identification of double porosity in fired clay ceramics
Verfasser / Verfasserin Kariem, Hawraa ; Hellmich, Christian ; Kiefer, Thomas ; Jäger, Andreas ; Füssl, Josef
Erschienen in
Journal of Materials Science, 2018, Jg. 53, H. 13, S. 9411-9428
ErschienenSpringer Nature, 2018
SpracheEnglisch
DokumenttypAufsatz in einer Zeitschrift
Projekt-/ReportnummerFFG (Grant No. 843897)
ISSN0022-2461
URNurn:nbn:at:at-ubtuw:3-5175 Persistent Identifier (URN)
DOI10.1007/s10853-018-2281-9 
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Micro-CT-based identification of double porosity in fired clay ceramics [4.35 mb]
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Optimizing thermal and mechanical properties of clay block masonry requires detailed knowledge on the microstructure of fired clays. We here identify the macro- and microporosity stemming from the use of three different pore-forming agents (expanded polystyrene, sawdust, and paper sludge) in different concentrations. Micro-CT measurements provided access to volume, shape, and orientation of macropores, and in combination with X-ray attenuation averaging and statistical analysis, also to voxel-specific microporosities. Finally, the sum of micro- and macroporosity was compared to corresponding data gained from two statistically and physically independent methods (namely from chemical analysis in combination with weighing, and from mercury intrusion porosimetry). Satisfactory agreement of all these independently gained experimental data renders our new concept for identifying the pore spaces of fired clay as a very promising tool supporting the further optimization of clay blocks.

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CC-BY-Lizenz (4.0)Creative Commons Namensnennung 4.0 International Lizenz