INITIAL ROUGHNESS OF ASPHALT WEARING COURSES - POSSIBILITIES OF CONTROL THROUGH MIXTURE COMPOSITION

ANFANGSGRIFFIGKEIT VON ASPHALTBETONDECKSCHICHTEN - MOEGLICHKEITEN DER EINFLUSSNAHME UEBER DIE MISCHGUTZUSAMMENSETZUNG

In order to produce initial roughness and grip of asphalt pavements crushed stone sand or fine grit can be sprinkled onto the surface while it is still hot and immediately rolled in, or one can achieve the required grip by adjusting the mixture composition, if enrichment with binder can be avoided. The second alternative was tried out by laying five stretches of experimental roads using various mix compositions. Measurements of skidding resistance were undertaken by the University of Berlin, institute for roads using the locked wheel trailer, and wear and deformation measurements by the bast, Cologne. The test roads which were constructed in 1975 showed the following trends: mixtures with high voids content in general had adequate initial roughness - high contents of crushed stone grit are advantageous - dense mixtures do not always have adequate initial roughness because of factors associated with the method of production. In these cases the sprinkling method is recommended. Measures to produce improvements in the initial grip have a favourable influence on the deformation resistance. The latitude available for such measures is not large if the durability of the pavement is not to be impaired. The sections of test road are still under observation. (TRRL)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/oclc/7286414
• Corporate Authors:

  Kirschbaum Verlag

  Siegfriedstrasse 28
  Bonn,   Germany  D-53179
• Authors:
  • DAMES, J
  • Lindner, J
  • SULTEN, P
• Publication Date: 1978-7

Language

• German

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 276-82
• Serial:
  • Straße Und Autobahn
  • Volume: 29
  • Issue Number: 7
  • Publisher: Kirschbaum Verlag
  • ISSN: 0039-2162

Subject/Index Terms

• TRT Terms: Asphalt pavements; Bituminous mixtures; Coefficient of friction; Crushed rock; Durability; Experimental roads; Grits; Improvements; Measurement; Mix design; Pavements; Rolled asphalt; Roughness; Sand; Skid resistance; Wearing course (Pavements)
• Old TRIS Terms: Cloutage; Crushed or manufactured sand
• Subject Areas: Construction; Highways; Materials; Pavements; I31: Bituminous Binders and Materials; I52: Construction of Pavements and Surfacings;

Filing Info

• Accession Number: 00317270
• Record Type: Publication
• Source Agency: Forschungsgesellschaft für Straßen- und Verkehrswesen (FGSV)
• Files: ITRD, TRIS
• Created Date: Feb 6 1981 12:00AM