CYLINDER SPLITTING AND MACHINE ERROR?

This article gives a brief account of research into the possible effects that the testing machine may have on the recorded results of the cylinder splitting test for concrete. The author first refers to research that has been carried out by the ready mix concrete and the cement and concrete research association into the way the machine can influence the results of cube tests. Work carried out by rmc concurrently with their routine 6-month verifications of their 20 machines is described. Tests were made on each machine using 12 of a batch of 24 concrete cylinders, the other 12 being tested on the machine at their central laboratory. 12 of the 20 machines were found to comply with grade a and 5 with grade b requirements: and 60% of the machines gave mean results significantly different from the reference machine. The author reports three modes of abnormal failure of the cylinder, and that the ability of A machine to produce accurate cube results does not necessarily indicate a similar accuracy with cylinders. It is concluded that a specially designed machine should be used for cylinder splitting, not the one currently used for cubes. It is also reported that, with the exception of the reference machine, all machines gave results that were influenced by the length of the cylinder, and that a slight tilt of the upper-platen significantly influenced results. /TRRL/

  • Availability:
  • Corporate Authors:

    Cement and Concrete Association

    52 Grosvenor Gardens
    London SW1W 0AQ,   England 
  • Authors:
    • RYLE, R
  • Publication Date: 1975-2

Media Info

  • Features: Photos;
  • Pagination: p. 36-37
  • Serial:
    • CONCRETE
    • Volume: 9
    • Issue Number: 2
    • Publisher: THE CONCRETE SOCIETY
    • ISSN: 0010-5317

Subject/Index Terms

Filing Info

  • Accession Number: 00125576
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS
  • Created Date: Apr 7 1976 12:00AM