TESTS TO IMPROVE THE LOS ANGELES TEST

VERSUCHE ZUR VERBESSERUNG DES LOS-ANGELES-TESTS

Studies to improve the Los Angeles test were concentrated in 3 areas - sample material, test conditions and type of stress. The sample material affects test values because of the specific characteristics of the rock and the particle dimensions. In the work described the effects of particle shape on the Los Angeles value were examined and a marked dependence was established. Studies of the effect of the test conditions showed that it is possible to reduce the dispersion in repeated tests by using sliding metal plates and catch basins. The relation between the Los Angeles value and number of spheres, inclination, total number of revolutions and revolution speed was determined. The greatest effect on standard deviation was produced by the number of revolutions of the drums. It was shown that each tolerance of the revolution speed leads to great errors. An analysis of the stressing process during the Los Angeles test showed that there is no direct impact by the spheres. However, the spheres rolling through the sample material may exert a stress similar to an impact stress. /TRRL/

  • Corporate Authors:

    Ministry of Building and Technology, Austria

    Stuberring 1
    A-1010 Vienna,   Austria 
  • Authors:
    • Wieden, P
    • AUGUSTIN, H
    • Zieger, M
  • Publication Date: 1977

Language

  • German

Media Info

  • Features: Figures; Photos; References; Tables;
  • Pagination: 36 p.
  • Monograph Title: VERSUCHE ZUR VERBESSERUNG DES LOS-ANGELES-TESTS
  • Serial:
    • Strassenforschung
    • Issue Number: 86
    • Publisher: Ministry of Building and Technology, Austria

Subject/Index Terms

Filing Info

  • Accession Number: 00194063
  • Record Type: Publication
  • Source Agency: Bundesanstalt für Straßenwesen (BASt)
  • Report/Paper Numbers: Monograph
  • Files: ITRD, TRIS
  • Created Date: Jun 13 1979 12:00AM