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Partial replacement of cement by fly ash in autoclaved products: theory and practice

From National Research Council Canada

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Affiliation
  1. National Research Council of Canada
FormatText, Article
SubjectConcrete; autoclaving; fly ash; cement; mechanical properties
Abstract
Nine different fly ashes have been used in a study of autoclaved (216 degrees C) cement-fly ash mixtures containing 50% fly ash (by weight). Paste samples for each fly ash were prepared at water-solid ratios of 0.22 to 0.45 and mechanical property-porosity relations were determined. The autoclaved products were characterized by several techniques. Linear correlations with a composition term, C/( S+A)-kF, were obtained for logarithms of zero-porosity modulus of elasticity and microhardness values. A linear correlation for modulus of elasticity of the porous solid and the composition term, 2-C/(S+A)-kF, was also obtained for each water-solid ratio. Correlations for microhardness of the porous solid with a composition term, 2-C/(S+A) are reported, a different curve for each water-solid ratio. Impregnation of the porous products resulted in increased values for modulus of elasticity and microhardness and provided an alternate means of estimating zero-porosity values of these properties.
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  • Journal of Materials Science 14 (1979): 1681–1693.
LanguageEnglish
Peer reviewedYes
IdentifierDBR-P-870
NRC numberNRCC 17868
NRC-IRC-3317
NPARC number20375777
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Record identifier2ba6ac3d-8077-419d-a632-f959fcb6935f
Record created2012-07-23
Record modified2024-03-15
Date modified: