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Image Analysis of Fly Ash in the Characterization of the Shape of the Grains

Published online by Cambridge University Press:  21 February 2011

M. Barrioulet ,
H. Cros ,
B. Husson  and
E. Ringot
M. Barrioulet
Affiliation:
LMDC INSA/UPS Génie Civil, complexe scientifique de Rangueil 31077 Toulouse, FRANCE
H. Cros
Affiliation:
LMDC INSA/UPS Génie Civil, complexe scientifique de Rangueil 31077 Toulouse, FRANCE
B. Husson
Affiliation:
LMDC INSA/UPS Génie Civil, complexe scientifique de Rangueil 31077 Toulouse, FRANCE
E. Ringot
Affiliation:
LMDC INSA/UPS Génie Civil, complexe scientifique de Rangueil 31077 Toulouse, FRANCE
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Abstract

Fly ash from power stations is used as concrete additive to improve strength and durability. Surprisingly, studies of ashes of identical mineralogical composition from two different places have reported different results in terms of the rheological properties of the fresh material. The viscosity of the pastes made from these different fly ashes seems to be linked to the proportion of spherical and smooth-shaped grains found in them. A quantitative image analysis was carried out to characterize the shape of the grains of these two ashes from different geographical origins. The main result proves that the higher the glassy particle content of the fly ash, the more the hydraulic matrix is fluid.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 370: Symposia Va/Vb – Microstructure of Cement-Based Systems/Bonding and Interfaces in Cement... , 1994 , 125
Copyright
Copyright © Materials Research Society 1995

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References

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