ACCELERATED FULL-SCALE LOAD TESTING OF RECYCLED HEAVY DUTY MACADAM ROADBASE MATERIAL

This report describes a trial carried out in the Pavement Test Facility at TRL to assess the performance, under repeated loadings of a moving wheel, of off-site recycled Heavy Duty Macadam (HDM) roadbase incorporating 50 per cent of reclaimed material in the mix. The trial also included a section of conventionally produced HDM, laid at the same time as the recycled material, to act as a control against which the performacne of the recycled material could be evaluated. In-situ measurements were made, on the subgrade, subbase, roadbase and wearing course to assess the variability in the structural strength of each pavement layer and that of the finished structure. During trafficking the rate of formation of permanent deformation and rutting caused by repeated applications of a loaded moving wheel were recorded together with measurements of dynamic strain generated in the subgrade. Periodic measurements were taken with the Falling Weight Deflectometer to monitor pavement deflection and modulus. Samples of both materials were taken from the compacted pavement for laboratory determination of elastic stiffness, resistance to permanent deformation and composition analysis. (A)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/09684107
• Corporate Authors:

  TRL

  Crowthorne House, Nine Mile Ride
  Wokingham, Berkshire  United Kingdom  RG40 3GA
• Authors:
  • BLACKMAN, D I
  • EARLAND, M G
  • Halliday, A R
• Publication Date: 1996

Language

• English

Media Info

• Features: References;
• Pagination: 18 p.
• Serial:
  • TRL REPORT 193
  • Publisher: TRL
  • ISSN: 0968-4107

Subject/Index Terms

• TRT Terms: Base course (Pavements); Bituminous macadam; Bituminous mixtures; Deflection; Deformation; Elasticity (Mechanics); Loads; Pavement design; Recycling; Rutting; Stiffness; Tests; Wearing course (Pavements)
• ITRD Terms: 4967: Bituminous mixture; 5586: Deflection; 5595: Deformation; 5912: Elasticity; 5567: Load; 3055: Pavement design; 4573: Recycling (mater); 2961: Roadbase; 3081: Rutting (wheel); 5931: Stiffness; 4932: Tarmacadam; 6255: Test; 2980: Wearing course
• Subject Areas: Highways; Pavements;

Filing Info

• Accession Number: 00737307
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• Files: ITRD, ATRI
• Created Date: Jun 27 1997 12:00AM