THE DETERMINATION OF NON-EVAPORABLE WATER IN HARDENED PORTLAND CEMENT PASTE

THE DEVELOPMENT IS REPORTED OF A REVISED METHOD FOR THE ESTIMATION OF NON-EVAPORABLE WATER. THE SAMPLE IS DRIED IN A VACUUM DESICCATOR AT THE TEMPERATURE OF DRY ICE (-79 C) FOR A PERIOD OF 5 TO 7 DAYS. THE SAMPLE IS REMOVED FROM THE DESICCATOR AND IGNITED AT 1050 C. THE WEIGHT LOSS ON IGNITION IS DUE TO VOLATILIZATION OF THE NON-EVAPORABLE WATER AND OTHER VOLATILE MATERIALS PRESENT IN THE ORIGINAL CEMENT. THE NEW METHOD IS QUICKER, EASIER, AND HAS SLIGHTLY GREATER PRECISION THAN THE OLDER METHOD REQUIRING THE USE OF MAGNESIUM PERCHLORATE. THE AMOUNT OF NON-EVAPORABLE WATER CAN SERVE AS A MEASURE OF THE DEGREE OF HYDRATION OF THE CEMENT. /PCA/

• Authors:
  • Copeland, L E
  • Hayes, J C
• Publication Date: 0

Media Info

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

Subject/Index Terms

• TRT Terms: Desiccation; Estimates; Hardness; Hydration; Pastes; Portland cement; Test procedures
• Subject Areas: Highways; Hydraulics and Hydrology; Materials;

Filing Info

• Accession Number: 00213496
• Record Type: Publication
• Source Agency: Portland Cement Association
• Report/Paper Numbers: No 47
• Files: TRIS
• Created Date: May 25 1970 12:00AM