CUED Publications database

Characterization of fly ashes by a novel method in the scanning electron microscope

Durdziński, PT and Dunant, CF and Ben Haha, M and Scrivener, KL (2017) Characterization of fly ashes by a novel method in the scanning electron microscope. In: Symposium on Advances in Cement Analysis and Concrete Petrography, 2018-6-27 to -- pp. 55-64..

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Abstract

Copyright © 2019 by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. In this paper, we show a new technique to characterize fly ashes using scanning electron microscopy (SEM). Chemical composition of millions of points is measured by SEM-energy dispersive X-ray spectroscopy and plotted in a ternary frequency plot. This new and straightforward way of displaying microscope data makes it easy to understand and assess the number, the approximate chemical composition, and the relative proportions of populations that constitute the fly ash. For quantitative characterization of the raw fly ash, these populations are grouped as predominantly silicate, calcium-silicate, aluminosilicate, and calciumrich aluminosilicate. The same technique is then used to track these anhydrous fly ash fractions in blended cements during hydration and thus provide crucial information on the reactivity of different glasses in cementitious systems.

Item Type: Conference or Workshop Item (UNSPECIFIED)
Subjects: UNSPECIFIED
Divisions: Div D > Structures
Depositing User: Cron Job
Date Deposited: 09 Jul 2019 01:42
Last Modified: 10 Apr 2021 22:47
DOI: 10.1520/STP161320WO250