THE USE OF GRAVEL TARMACADAM BASES IN HEAVILY TRAFFICKED ROADS

AS A RESULT OF THE EARLY PERFORMANCE OF A FULL SCALE ROAD EXPERIMENT LAID ON A4091, NEAR TAMWORTH, IN 1960, THE MINISTRY OF TRANSPORT PLACED RESTRICTIONS ON THE USE OF GRAVEL TARMACADAMS FOR ROAD BASES AND BASECOURSES IN ROADS DESIGNED TO CHARTS 1 OR 2 OF ROAD NOTE 29. THE RESTRICTIONS HAVE BEEN EXAMINED IN THE LIGHT OF: - (1) A STUDY OF THE ATMOSPHERIC TEMPERATURES AT TAMWORTH, (2) A THEORETICAL STUDY OF THE EFFECTS OF SURFACING THICKNESS ON THE STRESSES IN THE BASECOURSE AND BASE, (3) TESTS WITH THE RRL WHEEL TRACKING MACHINE, AND (4) RESULTS FROM OTHER FULL SCALE ROAD EXPERIMENTS WITH HIGHER VISCOSITY TARS IN GRAVEL TARMACADAM. ON THE BASIS OF THIS EXAMINATION IT IS RECOMMENDED THAT GRAVEL TARMACADAMS SHOULD BE PERMITTED FOR USE AS BASE MATERIALS ON ROADS, WITH CERTAIN RESTRICTIONS RELATING TO THE VISCOSITY OF THE TAR USED. /RRL/A/

  • Supplemental Notes:
    • Rept Lr, No 275, 27 PP, 10 FIG, 5 TAB, 16 REF
  • Corporate Authors:

    MINISTRY OF TRANSPORT, LONDON (UK)

    ,    
  • Authors:
    • Addis, R R
  • Publication Date: 1969

Subject/Index Terms

Filing Info

  • Accession Number: 00211233
  • Record Type: Publication
  • Source Agency: Road Research Laboratory /UK
  • Files: TRIS, ATRI
  • Created Date: Jan 26 1971 12:00AM