STUDIES OF THE ACCELERATED CURING OF CONCRETE TEST SPECIMENS

AN ACCELERATED CURING METHOD HAS BEEN PROPOSED AND DISCUSSED BY THE INSTITUTION OF CIVIL ENGINEERS AND IS GENERALLY ACCEPTED, BUT THERE ARE SOME DOUBTS AS TO WHETHER THE RIGID TIME LIMITS SPECIFIED WOULD BE OPERABLE UNDER THE VARIETY OF CONDITIONS THAT OBTAIN ON DIFFERENT CONSTRUCTION SITES. THIS TEST HAS THERFORE BEEN STUDIED IN DETAIL WITH A VIEW TO MODIFYING THE TIME-SCALE OF THE CURING REGIME SO THAT IT IS ACCEPTABLE UNDER ALL SITE CONDITIONS. PROPOSALS ARE MADE FOR ALLOWING THE SPECIMENS TO STAND FOR 1 - 3 HOURS BEFORE COMMENCING THE ACCELERATED CURING CYCLE, AND AFTERWARDS TO COOL IN WATER FOR A PERIOD OF 1 - 2 HOURS BEFORE TEST. THE CURING PERIOD IS REDUCED TO 20 HOURS IN ORDER TO ACCOMMODATE THESE PRE-CURING AND POST-CURING PERIODS WITHIN A CYCLE OF NOMINALLY 24 HOURS. IT IS SHOWN THAT FOR A WIDE RANGE OF AGGREGATES AND ORDINARY PORTLAND CEMENTS THE DIFFERENCE IN CONCRETE STRENGTHS CAUSED BY USING THE EXTREMES OF THE TIME TOLERANCES BEFORE AND AFTER ACCELERATED CURING IS LESS THAN THAT OBTAINED FOR THE EXTREMES OF THE TIME TOLERANCES OF THE ICE TEST. /AUTHOR/

  • Supplemental Notes:
    • Rrl Rept Lr 364, 16 PP, 5 FIG, 1 PHOT
  • Corporate Authors:

    Road Research Laboratory /UK

    ,    
  • Authors:
    • CORNELIUS, D F
    • Franklin, R E
  • Publication Date: 0

Subject/Index Terms

Filing Info

  • Accession Number: 00213856
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Feb 12 1971 12:00AM