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. Coal rank has traditionally been an aspect of fly ash Classification , particularly the division between low and high rank.
A fundamental geochemical tool in petrology is the Harker diagram with weight percent alkalis on the ordinate. Although primarily used as a measure of alkalis in igneous
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