Transcription of Fly Ash Classification Old and New Ideas
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Fly Ash Classification Old and New Ideas
Fly Ash Classification Old and New Ideas John M. Fox1 1 BASF Corporation, 23700 Chagrin Blvd., Cleveland, OH 44122 CONFERENCE: 2017 World of Coal Ash ( ) KEYWORDS: fly ash, composition, Classification FLY ASH Classification A key component of North American fly ash Classification has long been major element chemistry by weight percentage: SiO2 + Al2O3 + Fe2O3 in the ; CaO in Canada. The Canadian Standards Association (CSA) and the American Society for Testing and Materials (ASTM) recognize two classes of fly ash: Class F, normally produced from high-rank coals, and Class C, normally produced from low-rank coals.
Fly ash quality measures have been established based on major element chemistry and mineralogy .10 The cementing efficiency of fly ash in concrete has been shown to be related to the physical and chemical properties of the fly ash.
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