SPECIFIC VOLUME OF EVAPORABLE WATER IN HARDENED PORTLAND CEMENT PASTES

THE MEAN SPECIFIC VOLUME OF CHEMICALLY FREE WATER IN SATURATED HARDENED PORTLAND CEMENT PASTES WAS FOUND TO BE 0.99, INDEPENDENT OF THE EXTENT OF HYDRATION OF THE CEMENT OR THE WATER-CEMENT RATIO OF THE PASTE. THIS IMPLIES THAT THERE IS NO DIFFERENCE BETWEEN THE SPECIFIC VOLUMES OF GEL WATER AND CAPILLARY WATER IN SATURATED PASTES. THE TOTAL PORE VOLUME OF A HARDENED PASTE IS THUS 0.99W. THE SPECIFIC VOLUME OF THE HYDRATION PRODUCTS, 0.398, DETERMINED IN THIS WORK AGREES WELL WITH THE 0.392 OBTAINED BY POWERS AND BROWNYARD USING THE WATER-DISPLACEMENT METHOD. THE AMOUNT OF WATER THAT A PASTE MUST ABSORB TO REMAIN SATURATED WHILE THE CEMENT IS HYDRATING IS GIVEN BY AN EQUATION. /PCA/

• Authors:
  • Copeland, L E
• Publication Date: 0

Media Info

• Serial:
  • Portland Cement Assoc R & D Lab Bull
  • Issue Number: 0

Subject/Index Terms

• TRT Terms: Capillary water; Free water; Hardness; Hydration; Pastes; Pore space; Portland cement; Volume; Water cement ratio
• Subject Areas: Highways; Materials;

Filing Info

• Accession Number: 00213524
• Record Type: Publication
• Source Agency: Portland Cement Association
• Report/Paper Numbers: No 75
• Files: TRIS
• Created Date: May 25 1970 12:00AM