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

From National Research Council Canada

DOI	Resolve DOI: https://doi.org/10.1016/0008-8846(93)90083-L
Author	Search for: Low, N. M. P.; Search for: Beaudoin, J. J.¹
Affiliation	National Research Council of Canada. NRC Institute for Research in Construction
Format	Text, Article
Subject	Cement and Concrete; Concrete; Ciments
Abstract	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.
Publication date	1993-11
In	Cement and Concrete Research 23, no. 6 (November 1993): 1467–1479.
Language	English
Peer reviewed	Yes
Identifier	IRC-P-3190
NRC number	NRCC 35557 NRC-IRC-2983
NPARC number	20328203
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Record identifier	2b43378e-1f69-46a7-9dd5-5abf3e9986eb
Record created	2012-07-18
Record modified	2020-04-24

Date modified:: 2024-07-01