EFFECT OF CURING CONDITIONS ON THE CAPILLARY POROSITY OF HARDENED PORTLAND CEMENT PASTES

The capillary pore structure of hardened portland cement pastes cured by high-pressure steam, chemical acceleration, high-pressure steam with reactive SiO2, water immersion, water immersion and high-pressure steam, and hot-pressing was measured using mercury porosimetry to 50,000 psi. Differences of greater than 2 orders of magnitude exist in the average capillary pore diamters of the cement pastes studied. The largest pores (approximately 1 to 3 micrometers in diameter) are associated with high-pressure stream-cured pastes. The smallest average capillaries observed were 0.02 micrometer for pastes steam-cured with reactive SiO2. Hot-pressed pastes had essentially no porosity accessible to mercury. The application of pore size control to problems of polymer-impregnated concrete is discussed. /Author/

  • Corporate Authors:

    American Ceramic Society

    65 Ceramic Way
    Columbus, OH  United States  43714
  • Authors:
    • Auskern, A B
    • Horn, W H
  • Publication Date: 1976-1

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Filing Info

  • Accession Number: 00131195
  • Record Type: Publication
  • Files: TRIS
  • Created Date: May 14 1976 12:00AM