THE VARIABILITY OF THE STRENGTH OF CONCRETE AND ITS TREATMENT IN CODES OF PROCTICE

WAYS IN WHICH THE VARIABILITY OF CONCRETE CAN BE REPRESENTED AND THE EFFECT THIS HAS ON THE MARGIN BETWEEN THE SPECIFIED AND THE DESIGN MEAN STRENGTH OF CONCRETE ARE DISCUSSED. NEW EVIDENCE IS PRESENTED SUPPORTING THE ARGUMENT THAT THIS MARGIN SHOULD BE CONSTANT IRRESPECTIVE OF THE MEAN STRENGTH OF THE CONCRETE. DIFFERENCES IN THE REQUIREMENTS OF VARIOUS BRITISH CODES OF PRACTICE ARE NOTED AND THE PHILOSOPHY OF CONCRETE QUALITY CONTROL IMPLICIT IN THE LATEST CODES IS DISCUSSED IN DETAIL. A CASE IS MADE FOR THE SPECIFIED STRENGTH BEING SO CHOSEN THAT IT PERMITS A REASONABLE PERCENTAGE OF DEFECTIVES, FOR THE ABANDONMENT OF THE NOMINAL MIXES, FOR MORE FREQUENT TRULY RANDOM SAMPLING AND TESTING OF CONCRETE AND FOR BETTER USE OF ALL THE TEST RESULTS. CUBE TEST RESULTS SHOULD BE USED AS INDICATORS TO CHANGE THE MIX PROPORTIONS AND NOT TO REJECT CONCRETE IN THE STRUCTURE. THE PAPER CONCLUDES WITH SUGGESTIONS FOR FUTURE PRACTICAL DEVELOPMENTS AND FURTHER RESEARCH. /AUTHOR/

  • Supplemental Notes:
    • Vol 3, No 1, PP 30-47, 1 FIG, 4 TAB, 24 REF
  • Authors:
    • Teynnchee, D C
  • Publication Date: 1966-1

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  • Accession Number: 00212488
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Dec 15 1994 12:00AM