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 plus or minus 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.(a) /TRRL/

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  • Corporate Authors:

    Pergamon Press, Incorporated

    Maxwell House, Fairview Park
    Elmsford, NY  United States  10523
  • Authors:
    • LITVAN, G G
    • Sereda, P J
  • Publication Date: 1978-1


  • French

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Filing Info

  • Accession Number: 00178642
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS
  • Created Date: Sep 27 1978 12:00AM