The long term skid resistance performance of three artificial aggregates used in chipseal surfaces in New Zealand

Recent research has demonstrated that many natural aggregates from New Zealand (with supposedly high quality properties) do not perform well or predictably over an economic asset life in areas of high demand for friction. These areas require better and less variable (in terms of long term performance) skid resistant aggregates. This paper discusses and compares the skid resistance performance of three artificial aggregates (melter slag, electric arc furnace slag and calcined bauxite) with a natural greywacke aggregate used in New Zealand as road surfacing chip. The comparison includes surface friction test results of the accelerated polishing of laboratory prepared samples and the coefficient of friction as measured by the dynamic friction tester and in-field tests with the griptester. Furthermore, the paper shows what occurs to the microtexture of the aggregate surface by the use of scanning electron microscope (SEM) photographs and how the performance in terms of 'polishing' and measured skid resistance relates to the aggregate mineralogy, grain size and the textural relationship between the minerals in the aggregate chips themselves.


  • English

Media Info

  • Pagination: 18p
  • Monograph Title: 6th Symposium on Pavement Surface Characteristics, 20-23 October 2008, Potoroz, Slovenia: proceedings

Subject/Index Terms

Filing Info

  • Accession Number: 01383789
  • Record Type: Publication
  • Source Agency: ARRB
  • ISBN: 9789612389666
  • Files: ATRI
  • Created Date: Aug 22 2012 3:51PM