Document Type

Article

Abstract

Laser diffraction analysis is commonly used for determining the particle-size distribution (PSD) of fly ash. However, there is currently no standard method for preparing samples and analyzing them. The Mie and Fraunhofer optical models are used to calculate the PSD of fly ash from laser diffraction data. The Mie theory is most applicable for particles smaller than 50 mm, and is therefore the most accurate model for the analysis of fly ash. However, the refractive index (RI) of fly ash is complex and not well known. This study presents the analysis of several supplementary cementitious materials (SCMs) such as coal combustion fly ash, gasification slag, or blast-furnace slag with the objective of providing optical properties for these materials. The optical constants that are most applicable to a given type of fly ash and slag are suggested.

First Page

1

Last Page

6

DOI

10.4177/CCGP-D-09-00001

Volume

1

Publication Date

1-1-2009

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