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

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TypeArticle
Journal titleJournal of Materials Science
ISSN0022-2461
Volume14
Pages168193; # of pages: 1589
Subjectautoclaving; fly ash; cement; mechanical properties; Concrete; autoclavage; cendre volante; ciment; propriete mecanique
AbstractNine 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.
Publication date
LanguageEnglish
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
IdentifierDBR-P-870
NRC number17868
3317
NPARC number20375777
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Record identifier2ba6ac3d-8077-419d-a632-f959fcb6935f
Record created2012-07-23
Record modified2016-05-09
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