THE DETERMINATION OF CHEMICAL ENGINEERING DATA ON TAR AND TAR PRODUCTS. 15 - AN IMPACT TEST FOR ROAD BINDERS

A study has been made of the energy absorbed in rupturing a tar film in a pendulum impact machine. The behaviour has been explained in terms of three regions of temperature. At high temperatures the energy is absorbed by viscous traction, at low temperatures by elastic strain energy and in the intermediate visco-elastic region the energy rises to a marked maximum, and provides optimum conditions for stone retention by a binder. The addition of pvc is shown to be beneficial in that it widens the visco-elastic peak to cover a greater temperature range. A standard test at -10 deg C is shown to be suitable for comparing tars of known evt and assessing the effects of modification.(a) /TRRL/

  • Corporate Authors:

    Coal Tar Research Association

    Chemical Engineering Section
    Cleckheaton, West Yorkshire,   England 
  • Authors:
    • Briggs, DKH
  • Publication Date: 1968

Media Info

  • Features: Figures; References; Tables;
  • Pagination: 30 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00184297
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Report/Paper Numbers: Report 0401 Monograph
  • Files: ITRD, TRIS
  • Created Date: Jan 13 1979 12:00AM