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The Effect of wollastonite micro-fibre aspect ratio on reinforcement of portland cement-based binders

Par Conseil national de recherches du Canada

DOITrouver le DOI : https://doi.org/10.1016/0008-8846(93)90083-L
AuteurRechercher : ; Rechercher : 1
Affiliation
  1. Conseil national de recherches du Canada. Institut de recherche en construction du CNRC
FormatTexte, Article
SujetCement and Concrete; Béton; Ciments
Résumé
Reinforcement of Portland cement-based binders with natural wollastonite microfibres has been further investigated with emphasis on the effect of fibre geometry on property modification. Wollastonite microfibres were separated into five different size groups before addition to cement and cement-silica fume matrices. The aspect ratio (length/ width) of the wollastonite microfibres was determined by scanning electron microscopy technique. Systematic experimentation including flexural tests, mercury intrusion, porosimetry, helium gas pycnometry, and isopropyl alcohol saturation measurement showed that, at constant microfibre content, the flexural strength and total porsity of the composites remained essentially unchanged and independent of the aspect ratio of the wollastonite microfibres. However, the volume of coarse pores, the pore size distribution, the flexural toughness and overall ductibility characteristics of the hydrated cement and cement-silica fume matrices were observed to change systematically as the aspect ratio of wollastonite micro-fibres was increased. A discussion of the differences in the observed properties is presented.
Date de publication
Dans
  • Cement and Concrete Research 23, nº 6 (novembre 1993) : 1467–1479.
Langueanglais
Publications évaluées par des pairsOui
IdentificateurIRC-P-3190
Numéro du CNRCNRCC 35557
NRC-IRC-2983
Numéro NPARC20328203
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Identificateur de l’enregistrement2b43378e-1f69-46a7-9dd5-5abf3e9986eb
Enregistrement créé2012-07-18
Enregistrement modifié2020-04-24
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