Synthesis and sintering of high-temperature composites based on mechanically activated fly ash
Amount of fly ash which is and yet to be generated in the coming years highlights the necessity of developing new methods of the recycling where this waste can be reused in significant quantity. A new possibility for fly ash utilization is in high-temperature application (thermal insulators or/and r...
Gespeichert in:
Veröffentlicht in: | Science of sintering 2012, Vol.44 (2), p.135-146 |
---|---|
Hauptverfasser: | , , , , , , , |
Format: | Artikel |
Sprache: | eng |
Schlagworte: | |
Online-Zugang: | Volltext |
Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
Zusammenfassung: | Amount of fly ash which is and yet to be generated in the coming years
highlights the necessity of developing new methods of the recycling where
this waste can be reused in significant quantity. A new possibility for fly
ash utilization is in high-temperature application (thermal insulators or/and
refractory material products). As such, fly ash has to adequately answer the
mechanical and thermal stability criteria. One of the ways of achieving it is
by applying mechanical activation procedure on fly ash. In present study, fly
ashes from two different power plants were mechanically activated in a
planetary ball mill. Mechanically treated fly ashes were cemented with two
different binders: standard Portland cement and high-aluminates cement.
Physico-chemical analysis and investigation of mineralogical components of
composites are emphasized, due to the changes occurred in fly ash during
mechanical activation and sintering of composites. Macro-performance of the
composites was correlated to the microstructure of fly ash studied by means
of XRD and SEM analysis. Thermal stability of crystalline phases was
investigated with DTA. Highlight was placed on determination of relationship
between mechanically activated fly ash and obtained composites microstructure
on one side and behavior of sintered composites on the other side. |
---|---|
ISSN: | 0350-820X 1820-7413 |
DOI: | 10.2298/SOS1202135T |