INTERMITTENT CURING OF CONCRETE

THE INITIAL WET CURING PERIOD NECESSARY FOR CONCRETE PAVEMENT WAS SOUGHT FROM STUDIES OF THE EFFECTS UPON STRENGTH OF THE INITIAL MOIST CURING PERIOD, OF VARIOUS PERIODS OF ALTERNATE DRY AND WET CURING, OF INCREASED AIR TEMPERATURES, AND OF COMBINED WATER. INTERPRETING THE RESULTS THE FOLLOWING CONCLUSIONS WERE MADE: (1) AN INITIAL CURING LONGER THAN 7 DAYS WAS SELDOM JUSTIFIED, (2) IF ADEQUATE INTERMITTENT CURING WAS ASSURED, A 3 DAY INITIAL CURING SEEMED ADEQUATE, (3) FOR HIGH EARLY STRENGTH OR FOR LOCALITIES WHERE ADEQUATE INTERMITTENT CURING WAS NOT ASSURED, A SEVEN DAY INITIAL CURING WAS ADVISABLE, (4) A ONE DAY INITIAL CURING FOLLOWING BY AVERAGE INTERMITTENT CURING PRODUCED A STRENGTH AT 320 DAYS OF ABOUT 88.2 PERCENT OF THE MAXIMUM, AND (5) A 21 DAY PERIOD FOLLOWING THE 3 DAY INITIAL CURING PERIOD REDUCED THE STRENGTH ONLY 6.4 PERCENT AT AGE 320 DAYS. THE FOLLOWING FACTS WERE DISCLOSED: (1) MOST METHODS OF INTERMITTENT CURING RESULTED IN COMBINING ABOUT 45 PERCENT OF THE TOTAL ORIGINAL WATER AT AN AGE OF 320 DAYS, (2) CURING CONTINUOUSLY IN AIR OR UNDER WATER RESULTED IN A LOWER PERCENTAGE OF COMBINED WATER, (3) THE PERCENTAGE OF COMBINED WATER INCREASED WITH THE AGE AS DID THE STRENGTH, AND (4) MOST ALL OF THE SPECIMENS HAVING 21 DAYS OF INITIAL CURING HAD LOWER PERCENTAGES OF COMBINED WATER THAN SPECIMENS CURED INITIALLY FOR THREE OR SEVEN DAYS.

• Record URL:
  https://onlinepubs.trb.org/Onlinepubs/hrbproceedings/13/13part2-006.pdf
• Supplemental Notes:
  • Vol 13, ParT II, PP 66-82, FIG, TABS. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved.
• Authors:
  • Lang, F C
• Publication Date: 1934

Media Info

• Media Type: Digital/other
• Monograph Title: Proceedings of the Thirteenth Annual Meeting of the Highway Research Board Held at Washington, D.C. December 7-8, 1933. Part II: Report of Investigation Curing of Concrete Pavement Slabs
• Serial:
  • Highway Research Board Proceedings
  • Volume: 13
  • Publisher: Highway Research Board

Subject/Index Terms

• TRT Terms: Air; Concrete curing; Concrete pavements; Moisture content; Strength of materials; Temperature; Wetting
• Subject Areas: Highways; Materials;

Filing Info

• Accession Number: 00213769
• Record Type: Publication
• Files: TRIS, TRB
• Created Date: Aug 23 1971 12:00AM