SOME NSW EXPERIENCES IN SPECIFYING RUBBER MODIFIED AND HIGH NON -VOLATILE EMULSIFIED BITUMINOUS BINDERS . 15TH ARRB CONFERENCE, DARWIN, NORTHERN TERRITORY, 26-31 AUGUST 1990; PROCEEDINGS PARTS 1 TO 7

The NSW Road and Traffic Authority uses both scrap rubber and SBS modified bitumens in asphalt and for sprayed sealing works. Performance based specifications are in use for most of these binders and comparison of binder specifications gives some insight into differences between the generic types of binder. The binder specifications are written in terms of both the ARRB elastometer and established techniques such as softening point and penetration. The relationship between these techniques and the results obtained is discussed. Some data is presented relating to the changes in quality received by the Authority since introducing the specification. Increased interest in bituminous emulsions due to the advantage of lengthening the sealing season, minimising the environmental effects of cutter and the ease of placing modified binders have caused a proliferation of emulsion types on the market. The shear thinning behaviour of high solids emulsions is described. The advisability of testing at high shear rates and at application temperatures is also discussed. Simple tests to characterise the special properties of modified emulsions and to predict the settling of all emulsions are described. Some observations on the application properties of the new emulsions are presented, in particular those relating to green strength. (Author/TRRL)

  • Availability:
  • Corporate Authors:

    ARRB

    Melbourne, Victoria  Australia 
  • Authors:
    • CUNNINGHAM, J
    • GAUGHAN, R L
  • Publication Date: 1990

Language

  • English

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00609305
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS
  • Created Date: Jun 30 1991 12:00AM