INFLUENCE OF BITUMEN HARDNESS ON THE FATIGUE BEHAVIOUR OF ASPHALT PAVEMENTS OF DIFFERENT THICKNESS DUE TO BEARING CAPACITY OF SUBBASE, TRAFFIC LOADING AND TEMPERATURE. SIXTH INTERNATIONAL CONFERENCE, STRUCTURAL DESIGN OF ASPHALT PAVEMENTS, VOLUME I, PROCEEDINGS, UNIVERSITY OF MICHIGAN, JULY 13-17, 1987, ANN ARBOR, MICHIGAN

The most well known and world wide used fatigue laws are based on the results of bending tests on specimens of bituminous materials. Using one of these fatigue laws it can be demonstrated that the number of applicable load alternations increases with decreasing temperatures. Asphalt pavements however show increasing tensile stresses with drop of temperature because of the restrained thermal constraction within a range of adequate low temperatures. Superposition of these thermal induced tensile stresses to the bending stresses will result in a smaller number of applicable load alternations until a first cumulative damage will occur, if the pavement is kept below a certain temperature limit. The use of a harder bitumen type - par example of a bitumen pen 20 instead of a bitumen pen 80 - entails a shifting of the critical temperature of about 15 deg C in the direction of higher temperature. Therefore the conclusion can be drawn that the use of harder bitumen types at lower temperatures involves a significant smaller number of applicable load alternations until fatigue occurs.

• Corporate Authors:

  University of Michigan, Ann Arbor

  Department of Civil Engineering
  Ann Arbor, MI  United States  48109
• Authors:
  • ARAND, W
• Publication Date: 1987

Media Info

• Features: Figures; Photos; References; Tables;
• Pagination: p. 65-71
• Serial:
  • Publication of: Michigan University, Ann Arbor
  • Publisher: University of Michigan, Ann Arbor

Subject/Index Terms

• TRT Terms: Asphalt pavements; Bearing capacity; Bitumen; Conferences; Fatigue (Mechanics); Hardness; Pavements; Subbase (Pavements); Temperature; Tension; Thickness; Traffic loads
• Uncontrolled Terms: Pavement thickness; Subbase; Tensile stress
• Subject Areas: Design; Freight Transportation; Highways; Pavements; I22: Design of Pavements, Railways and Guideways;

Filing Info

• Accession Number: 00485476
• Record Type: Publication
• Files: TRIS
• Created Date: Jul 31 1989 12:00AM