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Flexural Strength and Fracture Properties of a Fly Ash Blended Cement

Published online by Cambridge University Press:  25 February 2011

S. Chanda  and
J. E. Bailey
S. Chanda
Affiliation:
Department of Materials Science and Engineering, University of Surrey Guildford Surrey UK
J. E. Bailey
Affiliation:
Department of Materials Science and Engineering, University of Surrey Guildford Surrey UK
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Abstract

The flexural strength, fracture toughness and Young's Modulus of an ordinary Portland cement plus 25 wt% fly ash paste (FACP) were compared with those of a control paste (HCP) at times ranging from one day to one year. At comparatively early times these properties develop more slowly in FACP. However, at comparatively late ages, e.g. ten months, FACP showed improvements over HCP for all of these properties. A complicating factor is that for both FACP and HCP, the flexural strength and toughness show maxima and the “crossover” times for the various properties differ. This paper analyses these results in terms of the observed fracture mechanism for HCP by taking into account the changes brought about in the microstructure of FACP, due to the incorporation of fly ash.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 43: Symposium M – Fly Ash and Coal Conversion By-Products I , 1984 , 107
Copyright
Copyright © Materials Research Society 1985

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