Comprehensive phase characterization of crystalline and amorphous phases of a Class F fly ash

Journal Article · Fri Jan 15 00:00:00 EST 2010 · Cement and Concrete Research

DOI:https://doi.org/10.1016/j.cemconres.2009.08.029· OSTI ID:21344741

Stutzman, Paul ^[1]; Juenger, Maria C.G.; Fowler, David W ^[2]

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1. National Institute for Standards and Technology, Gaithersburg, MD 20899 (United States)
2. University of Texas at Austin, Austin, TX 78712 (United States)

A comprehensive approach to qualitative and quantitative characterization of crystalline and amorphous constituent phases of a largely heterogeneous Class F fly ash is presented. Traditionally, fly ash composition is expressed as bulk elemental oxide content, generally determined by X-ray fluorescence spectroscopy. However, such analysis does not discern between relatively inert crystalline phases and highly reactive amorphous phases of similar elemental composition. X-ray diffraction was used to identify the crystalline phases present in the fly ash, and the Rietveld quantitative phase analysis method was applied to determine the relative proportion of each of these phases. A synergistic method of X-ray powder diffraction, scanning electron microscopy, energy dispersive spectroscopy, and multispectral image analysis was developed to identify and quantify the amorphous phases present in the fly ash.

• OSTI ID: 21344741
• Journal Information: Cement and Concrete Research, Vol. 40, Issue 1; Other Information: DOI: 10.1016/j.cemconres.2009.08.029; PII: S0008-8846(09)00240-3; Copyright (c) 2009 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; ISSN 0008-8846
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
AMORPHOUS STATE
FLY ASH
IMAGE PROCESSING
OXIDES
PHASE STUDIES
SCANNING ELECTRON MICROSCOPY
X-RAY DIFFRACTION
X-RAY FLUORESCENCE ANALYSIS
X-RAY SPECTROSCOPY
AEROSOL WASTES
ASHES
CHALCOGENIDES
CHEMICAL ANALYSIS
COHERENT SCATTERING
COMBUSTION PRODUCTS
DIFFRACTION
ELECTRON MICROSCOPY
MICROSCOPY
NONDESTRUCTIVE ANALYSIS
OXYGEN COMPOUNDS
PROCESSING
RESIDUES
SCATTERING
SPECTROSCOPY
WASTES
X-RAY EMISSION ANALYSIS