EFFECT OF COARSE AGGREGATE CONTENT ON DIFFERENT ASPHALTIC CONCRETE SURFACINGS

INVERKAN AV HALTEN GROVRE STEN PA NAGRA OLIKA TYPER AV ASFALTSBELAGGNINGAR

The wear of bituminous pavements having a great expected wear resistance was studied on two places (in central and western Sweden) with different climate and with different aggregate petrography. The pavement types selected were made of different types of mixes with rolled in coated chippings, one dense-graded asphaltic concrete with high coarse aggregate content and one modified type of open-graded asphaltic concrete. Comparative measurements were made of surfacings of conventional dense-graded asphaltic concrete. The wear and the number of vehicles with studded tyres were recorded during each winter seasons. The friction (BFC) was measured during spring, summer and autumn each year. The wear on the road in western Sweden was found to be 1,8 times the wear on the road in central Sweden. The results indicate that an increase in maximum particle size and in the content of coarse aggregates reduct the wear. The friction proved to vary with the season, the highest value appearing in spring and the lowest in summer. Considering the type of surfacing the friction shows an irregular dependence. /Author/

  • Availability:
  • Corporate Authors:

    Swedish National Road and Transport Research Institute (VTI)

    Olaus Magnus vaeg 35
    Linkoeping,   Sweden  SE-581 95
  • Authors:
    • Lilja, B
  • Publication Date: 1978

Language

  • Swedish

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00189319
  • Record Type: Publication
  • Source Agency: Swedish National Road and Traffic Research Institute
  • Report/Paper Numbers: VTI Report 161 Monograph
  • Files: ITRD, TRIS
  • Created Date: Apr 12 1979 12:00AM