Acceptance control is used by the client to determine whether a product manufactured for him by the contractor, conforms to specifications. As the quantity of concrete produced for road pavements is normally high a large amount of concrete is judged each day. The acceptance plan or criteria used should therefore be fair and accurate. The acceptance plan currently used requires a large amount of engineering judgement in its application. In the draft TRH5 publication (March 1977) a general acceptance model, based on stochastic principles, is described. This model reduces the amount of engineering judgement required. In this paper these two methods are compared from the point of view of implementation and theoretical accuracy. It is concluded that the present method of acceptance control is theoretically rigid. In view of the amount of money involved, the need for the use of engineering judgement is unsatisfactorily high. It is also concluded that the TRH5 method is sound, but that its accuracy is impaired by incorrect statistical assumptions made in the derivation of the acceptance limits. Furthermore if present sampling and testing methods are followed the plan will be very expensive, if not impractical to implement. An alternative acceptance plan is therefore proposed. It is based on the TRH5 method, but does not involve the statistical inaccuracies. An alternative sampling and testing plan is also suggested for use with this method to make it practicable. /Author/TRRL/

  • Availability:
  • Corporate Authors:

    South African Institute of Civil Engineers

    P.O. Box 1187, 75 Marshall Street
    Johannesburg,   South Africa 
  • Authors:
    • PRINS, V
  • Publication Date: 0

Media Info

  • Features: Figures; Tables;
  • Pagination: p. 283-289
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00193926
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Files: ITRD, TRIS
  • Created Date: Jun 13 1979 12:00AM