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

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 29-33
• Serial:
  • American Ceramic Society Journal
  • Volume: 59
  • Issue Number: 1-2
  • Publisher: f Public Works

Subject/Index Terms

• TRT Terms: Cement paste; Concrete curing; Polymer concrete; Porosity; Pressure; Steam curing
• Uncontrolled Terms: High pressure
• Subject Areas: Highways; Materials;

Filing Info

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