The evolution of the quality assurance system for liquid asphaltic materials used in paving mixures is traced, and the system currently implemented in West Virginia is outlined. From the earliest system which consisted of an acceptance sampling and testing scheme involving the sampling of liquid asphalt materials upon receipt at the job site, there evolved the presampling pretesting system. In this system, the liquid asphalt was sampled at the source of manufacture, the samples were submitted to the central laboratory, and on completion of testing (and provided that the material met specifications), the stock of material was approved for shipment. The stock of material which had been sampled was identified by numbered tags and the quantity represented was documented and auditable. This system has provided the input for the evolution of a new generation acceptance system which is optimizing costs, optimizing the effectiveness of resources available for the assuarance program, and causing no significant change in risk levels. The system consists of 3 basic phases: manufacturing, shipping and delivery. Phase I provides for the supplier to submit (to the Department) quality control data which are entered into the computer data bank. Monitor samples are then takne by the Department for the suppliers facility. Data from the latter testing are compared with the data supplied by the supplier (a description of the specific criteria are detailed in a flow diagram). The Second Phase provides assurance that materials characteristics have not changed due to storage prior to shipment. Phase III criteria are designed to evaluate monitor the effect of shipping material from manufacturing site to the point of delivery. Successful completion of the 3 phases leads to certification as "Level One: which involves reduced testing. Failure to meet the criteria leads to certification as "Level Two" wherein procedures of Presampling Pretesting are employed.

  • Corporate Authors:

    University of Minnesota, Minneapolis

    155 Experimental Engineering Building
    Minneapolis, MN  United States  55455
  • Authors:
    • Steele, G W
    • O'Leary, J R
    • Miller, C L
  • Conference:
  • Publication Date: 1974

Media Info

  • Features: Figures; References;
  • Pagination: p. 178-190
  • Serial:
    • Volume: 43

Subject/Index Terms

Filing Info

  • Accession Number: 00125402
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Oct 18 1975 12:00AM