IS ANYONE FOR CYLINDER SPLITTING?

THE ARTICLE PUTS FORWARD ARGUMENTS IN FAVOUR OF RETAINING CUBE CRUSHING FOR CONCRETE TESTING, RATHER THAN CHANGING TO CYLINDER SPLITTING AS REQUIRED IN THE 1972 AMENDMENTS TO THE 1969 DOE SPECIFICATION FOR ROAD AND BRIDGEWORKS. IT IS ARGUED THAT THE CYLINDER TEST IS INAPPROPRIATE TO MEASURE FLEXURAL TENSILE STRESSES SUCH AS THOSE PRODUCED BY TRAFFIC LOADING. CYLINDER SPLITTING EXPERIMENTS ARE DESCRIBED WHICH INDICATE THAT GREATER LOAD CARRYING CAPACITY MAY NOT IMPLY INCREASED TENSILE STRENGTH. AS CONCRETE IS A VARIABLE MATERIAL, A TEST WHICH IS SENSITIVE TO VARIATIONS IN QUALITY IS DESIRABLE. CUBE CRUSHING HAS BEEN SHOWN TO BE MORE SENSITIVE THAN CYLINDER SPLITTING IN THIS RESPECT, AND THE VARIABILITY OF CUBE TESTING HAS BEEN THOROUGHLY DOCUMENTED. TWO REPORTS FROM READY MIXED CONCRETE TECHNICAL SERVICES ARE SUMMARISED. THE FIRST INDICATES THAT THE COMPRESSIVE TESTING MACHINES USED AT PRESENT MAY NOT BE SUITABLE FOR CYLINDER SPLITTING TESTS. THE SECOND SUGGESTS THAT 4 TIMES AS MANY CYLINDER SPECIMENS MUST BE TESTED TO ACHIEVE THE SAME PRECISION, AS THE COEFFICIENT OF VARIATION DUE TO TESTING FOR CYLINDERS IS TWICE THAT FOR CUBES.

Media Info

  • Features: Figures; Photos;
  • Pagination: 3 p.
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00081710
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS
  • Created Date: Feb 27 1975 12:00AM