EFFECTS OF GRAIN SIZE DISTRIBUTION IN ALITE CEMENT ON PORE SIZE DISTRIBUTION AND STRENGTH OF HARDENED MOTAR

The characteristics of hardened cement were studied using synthesized alite in order to obtain clear results. It was confirmed that the rate of hydration, pore size distribution and strength are influenced mainly by the surface area of the cement and to a much lesser degree by the grain size distribution. Accompanying the progress of hydration, the mechanical strength of mortar increases owing to the decrease in the porosity, especially the wide-pore volume. If we apply Knudsen's equation, S=SO exp(-BP) to this type of case in which porosity changes with time, the values so and B are estimated to be greater than those in the usual porous materials. The super-rapid-hardening portland cement was found to have an advantage over alite in strength development. This seems to be due to the formation of ettringite which fills the pores rapidly.(A)

  • Supplemental Notes:
    • This paper was presented at the conference on the Mechanical Behaviour of Materials, sponsored by the Society of Materials Science in 1972.
  • Corporate Authors:

    Society of Materials Science

    1 Yoshida Izumidono-cho, Sakyo-Ku
    Kyoto 600,   Japan 
  • Authors:
    • Kondo, R
    • Diamon, M
    • OKABAYASHI, S
  • Publication Date: 1972

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Filing Info

  • Accession Number: 00084106
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Report/Paper Numbers: Conf Paper
  • Files: ITRD, TRIS
  • Created Date: Jun 10 1975 12:00AM