A PILOT STUDY OF THE PERFORMANCE OF POROUS ASPHALT IN STATIC CREEP AND REPEATED LOADING

The ability of a new porous asphalt product to resist rutting and fatigue is of special interest when it is being used for the first time. Accordingly, a pilot study was undertaken, in cooperation with industry, to develop laboratory procedures for measuring the performance of a range of experimental products in static creep, at 40 degrees C, and in repeated sinusoidal loading, at 10Hz and 16 degrees C. Cylindrical test specimens were compacted in a sliding mould to produce voids contents between 20 and 25%. The resulting specimens were approximately 220 mm high. For the creep tests, the specimens were sawn into 60 mm high discs and polished: for the fatigue tests, the specimens were glued to end plates and tested whole with transducers mounted over the middle third to eliminate end effects. The performance of porous asphalt in fatigue was better than that for roadbase materials and less than that for surfacing materials. The restraining effect of the bearing plates during the static creep test was best overcome using a pharmaceutical jelly. After 1 hour of loading, the strains in porous asphalts with a modified binder and pure bitumen were not significantly different. The respective total elastic recoveries, and the residual viscous strains after 2 hours were significantly better with the modified binder. (A) For the covering abstract see IRRD 885061.

• Corporate Authors:

  European Asphalt Pavement Association

  P.O. Box 175
  3620 AD Breukelen,   Netherlands 

  EUROBITUME (EUROPEAN BITUMEN ASSOCIATION)

  PLACE MADOU 1, TOUR MADOU, 25TH FLOOR
  BRUSSELS,   Belgium  1030
• Authors:
  • BRENNAN, M J
  • Meade, J
  • HYNES, M
  • Murphy, D J
  • Lycett, C
• Conference:
  • EURASPHALT & EUROBITUME CONGRESS, STRASBOURG, 7-10 MAY 1996. VOLUME 2. PAPER E&E.4.065
• Publication Date: 1996

Language

• English

Media Info

• Features: References;
• Pagination: 9 p.

Subject/Index Terms

• TRT Terms: Asphalt; Conferences; Creep; Fatigue (Mechanics); Loads; Measurement; Porous materials; Properties of materials; Rutting
• ITRD Terms: 8525: Conference; 4732: Creep (mater); 5579: Fatigue (mater); 5567: Load; 6136: Measurement; 4946: Porous asphalt; 5925: Properties; 3081: Rutting (wheel)
• Subject Areas: Data and Information Technology; Materials;

Filing Info

• Accession Number: 00736223
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• Files: ITRD
• Created Date: May 30 1997 12:00AM