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Particulate admixture for enhanced freeze-thaw resistance of concrete

From National Research Council Canada

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DOIResolve DOI: https://doi.org/10.1016/0008-8846(78)90057-1
AuthorSearch for: 1; Search for: 1
Affiliation
  1. National Research Council of Canada
FormatText, Article
SubjectAdmixtures; concrete (materials); porous concrete; air entrapped concrete; freeze thaw cycles; frost resistance
Abstract
Incorporation of porous particles with at least 30 per cent total porosity and pore diameters, mainly between 0.3 and 2 microns, added to the plastic mix were found to improve significantly the freeze-thaw resistance of hydrated neat cement paste and concrete. Particles of commercially fired clay bricks, diatomaceous earth, and fly ash (sintered and agglomerated) were tested. The concentration required for the achievement of a given level of frost resistance depends on the physical characteristics of the material. Typically, granules of a particular brick (0.5 + or - 0.08 mm in size, 36 per cent total porosity) in 16 wt per cent concentration allowed 0.5 w/c cement paste specimen to endure 1260 freeze- thaw cycles without injury. Incorporation of porous particles as admixtures eliminates the problems due to the instability and strength reducing effect of conventionally entrained air bubbles.
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  • Cement and Concrete Research 8, no. January 1 (1 January 1978): 53–60.
LanguageEnglish
Peer reviewedYes
IdentifierDBR-P-748
NRC numberNRCC 16387
NRC-IRC-2836
NPARC number20374381
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Record identifier0cc0a281-af54-4fb6-a44b-5d027f6a0458
Record created2012-07-23
Record modified2024-03-14
Date modified: