THE SAMPLING AND TESTING OF BITUMINOUS MATERIALS

The general attitudes to, and the purpose of sampling and testing are discussed briefly. Acceptable methods of sampling at the mixing plant, on delivery of the material to the laying site, and after laying are described. Reasons are given for keeping the mass of the bulk sample to about eight times the mass of the test sample. The need for great care in reducing the bulk sample to a size that is suitable for analysis is emphasised. Suggestions are made for some checks that should be made to determine whether analysis is worthwhile. The various possibilities in the preparatory treatment of the bulk sample to obtain the test sample are covered. The benefits in keeping the mass of the test sample within strictly prescribed limits are stated. The main problems associated with the procedures for binder content and grading are identified, and the particular difficulties that have arisen when analysing dense-tar-slag mixtures are discussed. The development of grading methods and the present illogicality of using "wet" sieving and 'dry' specifications for filler is exposed. It is suggested that routine duplicate testing is of less value than testing two different samples, but duplicate testing is of great value when training testers. The proper use of precision data is discussed. A brief statement of the practical problems that can occur during the recovery of bitumen from mixed materials is included. (a) (TRRL)

  • Corporate Authors:

    INSTITUTE OF ASPHALT TECHNOLOGY

    PAPER MEWS PLACE, 290 HIGH STREET
    DORKING, SURREY  United Kingdom  RH4 1QT

    INSTITUTE OF ASPHALT TECHNOLOGY

    PAPER MEWS PLACE, 290 HIGH STREET
    DORKING, SURREY  United Kingdom  RH4 1QT

    INSTITUTE OF ASPHALT TECHNOLOGY

    PAPER MEWS PLACE, 290 HIGH STREET
    DORKING, SURREY  United Kingdom  RH4 1QT
  • Authors:
    • Goodsall, G D
  • Publication Date: 1980-6

Media Info

  • Features: References; Tables;
  • Pagination: p. 10-15
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00324837
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Files: ITRD, TRIS
  • Created Date: Jun 12 1981 12:00AM