A PRELIMINARY STUDY OF THE INDIRECT TENSILES AND COMPRESSIVE STRENGTHS OF VARIOUS CONCRETES

THE EXISTING COMPRESSIVE STRENGTH SPECIFICATION FOR PAVEMENT QUALITY CONCRETE IS BEING REPLACED BY A TENSILE STRENGTH SPECIFICATION IN THE CURRENT REVISION OF THE M.O.T. 'SPECIFICATION FOR ROAD AND BRIDGE WORKS'. SOME EXPERIMENTS HAVE THEREFORE BEEN CARRIED OUT ON GRAVEL AND CRUSHED ROCK CONCRETES TO DETERMINE THE MOST APPROPRIATE TENSILE STRENGTH CORRESPONDING TO THE EXISTING COMPRESSIVE STRENGTH SPECIFICATION. THERE WAS NO UNIQUE RELATION BETWEEN TENSILE AND COMPRESSIVE STRENGTH, THE CRUSHED ROCK CONCRETES HAVING HIGHER TENSILE STRENGTHS THAN THE GRAVEL CONCRETES FOR A GIVEN COMPRESSIVE STRENGTH. AFTER SEVEN DAYS, THE RATE OF GAIN OF TENSILE STRENGTH DECREASED WITH RESPECT TO THAT OF COMPRESSIVE STRENGTH. THE COEFFICIENT OF VARIATION OF THE TENSILE STRENGTHS MEASURED IN THE LABORATORY WAS ABOUT DOUBLE THAT OF THE COMPRESSIVE STRENGTHS. A 28-DAY TENSILE STRENGTH OF 325 LBS PER SQUARE INCH IS SUGGESTED AS AN INTERIM SPECIFICATION FOR ROAD CONCRETES. /RRL/A/

  • Supplemental Notes:
    • Tech Note 217, PP 1-17, 5 FIG, 3 TAB, 2 PHOT, 16 REF
  • Authors:
    • CORNELIUS, D F
    • Franklin, R E
  • Publication Date: 1967-9

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Filing Info

  • Accession Number: 00212821
  • Record Type: Publication
  • Source Agency: Road Research Laboratory /UK
  • Files: TRIS
  • Created Date: Aug 28 1994 12:00AM