A compositional index of the pozzolanic potential of pulverized-fuel ash

The composition of pulverized fuel ash (PFA) is explained on the basis of processes occurring in the mineral fraction of coal during firing. Up to 6% K2O present in illite causes its fusion and the formation of amorphous pozzolanic material. Kaolinite, having no K2O content, is infusible at the comb...

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Veröffentlicht in:	Journal of materials science letters 1984-11, Vol.3 (11), p.958-960
Hauptverfasser:	HUBBARD, F. H, DHIR, R. K
Format:	Artikel
Sprache:	eng
Schlagworte:	Applied sciences Buildings. Public works Cement concrete constituents Cements Exact sciences and technology Materials
Online-Zugang:	Volltext
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Beschreibung
Zusammenfassung:	The composition of pulverized fuel ash (PFA) is explained on the basis of processes occurring in the mineral fraction of coal during firing. Up to 6% K2O present in illite causes its fusion and the formation of amorphous pozzolanic material. Kaolinite, having no K2O content, is infusible at the combustion temperature. The amorphous content of PFA's of coal-fired UK power stations increases with the molar ratio of K2O to Al2O3, which is therefore recommended as an index of pozzolanic potential. 3pp 1fig 2tab
ISSN:	0261-8028 1573-4811
DOI:	10.1007/BF00720328