AN ASSESSMENT OF THE OUTFLOW METER FOR MEASURING THE DAMAGE CAPABILITY AND MACROTEXTURE CHANNEL SIZE OF OPEN GRADED RUNWAY SURFACES

This memorandum reports the results of tests made with an outflow meter on three open graded runway surfaces. Two of these surfaces, namely the Rae and Doe friction courses, are laid on runways 18-36 and 11-29 respectively at Rae, Farnborough, and use a bituminous binder. The third surface is experimental and uses an epoxy resin binder; it is only available in specimen form and has not been laid as a runway surface. The tests indicate that all three surfaces have similar drainage times to those measured by caa on five other open graded runways elsewhere in the UK. The rae friction course is shown to have slightly better drainage capability than the doe friction course, which in turn has superior drainage to the experimental surface. It is concluded that the outflow meter, in its present form, may be used to rate the macrotexture channel sizes of the surfaces, but, since it does not represent adequately the pressure conditions experienced in a typical aircraft tyre footprint region, development of the device is required. (A) /TRRL/

  • Corporate Authors:

    Royal Aircraft Establishment

    Structures Department
    Farnborough, Hampshire,   England 
  • Authors:
    • Smith, T R
  • Publication Date: 1975-1

Media Info

  • Features: Figures; Photos; References; Tables;
  • Pagination: 16 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00139104
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Report/Paper Numbers: Technical Memo EP579Monograph
  • Files: ITRD, TRIS
  • Created Date: Nov 9 1977 12:00AM