CAPILLARY CONTINUITY OR DISCONTINUITY IN CEMENT PASTES

THE CAPILLARY STRUCTURE OF CEMENT PASTE IS STUDIED IN TERMS OF DATA ON PERMEABILITY TO WATER. CAPILLARIES IN FRESH PASTE ARE CONTINUOUS BUT IF THE SPECIFIC SURFACE AREA OF THE CEMENT IS 1800 SQ CM/G OR GREATER (WAGNER) AND IF THE WATER-CEMENT RATIO IS NOT HIGHER THAN 0.7 BY WEIGHT, PRODUCTION OF CEMENT GEL DURING THE CURING PERIOD MAY EVENTUALLY SEGMENT THE CAPILLARIES, FORMING "CAPILLARY CAVITIES." IF THE SPECIFIC SURFACE AREA IS HIGHER, THE LIMITING WATER-CEMENT RATIO IS HIGHER, AND PRESUMABLY, VICE VERSA. SOME PRACTICAL CONSEQUENCES OF CAPILLARY CONTINUITY OR LACK OF IT ARE DISCUSSED. /PCA/

• Authors:
  • Powers, T C
  • Copeland, L E
  • Mann, H M
• Publication Date: 0

Media Info

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

Subject/Index Terms

• TRT Terms: Capillarity; Cement; Pastes; Permeability; Water; Water cement ratio
• Subject Areas: Highways; Materials;

Filing Info

• Accession Number: 00213552
• Record Type: Publication
• Source Agency: Portland Cement Association
• Report/Paper Numbers: No 110
• Files: TRIS
• Created Date: Jun 1 1970 12:00AM