THE OPERATING CHARACTERISTICS OF A.S. CA2, - 1963, 1968 & 1973 VERSIONS

The application of statistical principles is necessary to the writing of a rational code for the control of concrete quality. This paper complements previous papers by the author in which the statistical basis of the 1963, 1968 and 1973 version of Australian Standard CA2 was examined. The requirements for a satisfactory specification are considered, and the producer's and consumer's risks of the actual codes are compared by calculating the operating characteristics of the various requirements of the different codes; where necessary, the procedure required to calculate any particular operating characteristic is briefly explained. The advantages and disadvantages of each code can clearly be seen by examination of their respective operating characteristic curves. It is concluded that the 1973 version of CA2 contains an important advance on previous versions, the concept of plant control testing, which enables the actual standard deviation of concrete being produced by a concrete batching plant to be reasonably assessed. Nevertheless CA2-1973 contains a weakness that will be eliminated in the proposed metric version. The operating characteristics of the proposed metric version indicate that it will provide an excellent balance between the producer's and consumer's risks, both of which will be acceptably low. The appendix contains brief extracts of the relevant sections of the three codes. (A)./TRRL/

  • Supplemental Notes:
    • Presented at the 1st Australian Conference on Engineering Materials.
  • Corporate Authors:

    University of New South Wales

    School of Civil Engineering, Anzac Parade
    Kensington, New South Wales  Australia  2033
  • Authors:
    • Manton-Hall, A W
  • Publication Date: 0

Media Info

  • Features: Figures; References; Tables;
  • Pagination: 23 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00126545
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Report/Paper Numbers: Conf Paper
  • Files: ITRD, TRIS
  • Created Date: Apr 21 1976 12:00AM