THE EFFECTS OF NATURAL RUBBER ON ROAD BINDERS AND THEIR CONTRIBUTION TO IMPROVEMENTS IN ROAD SURFACINGS

THE ADDITION OF A FEW PER CENT OF NATURAL RUBBER PRODUCES MARKED CHANGES IN THE PHYSICAL PROPERTIES OF BITUMINOUS ROAD BINDERS. PRONOUNCED ELASTICITY, REDUCED TEMPERATURE SUSCEPTIBILITY, MARKED DEVIATION FROM NEWTONIAN FLOW AND INCREASED RESISTANCE TO FRACTURE UNDER IMPACT ARE THE MAIN CHANGES. IT HAS BEEN FOUND THAT THE EXTENT OF THESE CHANGES DEPENDS ON THE FORM IN WHICH THE RUBBER IS USED. RECENTLY, METHODS OF ANALYSIS HAVE BEEN DEVELOPED BY WHICH THE EFFECTIVENESS OF THE RUBBER, WHICH IS RELATED TO ITS CHEMICAL STATE, CAN BE ASSESSED. THESE METHODS HAVE BEEN USED TO GIVE AN ESTIMATE OF THE TIME ALLOWABLE FOR STORAGE OF RUBBERISED MATERIALS AT ELEVATED TEMPERATURE AS THE STATE OF RUBBER AND HENCE ITS EFFECTIVENESS IS AFFECTED BY SEVERE HEATING. FULL-SCALE EXPERIMENTS HAVE BEEN CARRIED OUT AND HAVE SHOWN DEFINITE ADVANTAGES FOR THE USE OF NATURAL RUBBER BLENDED INTO THE BINDER OF MASTIC ASPHALT, ROLLED ASPHALT, BITUMEN MACADAM AND SURFACE DRESSING. REFERENCES' ROAD INTERNATIONAL, /55/, 30-8, 1964.

  • Supplemental Notes:
    • Vol 16, No 8, PP 334-336, 348-349, 4 FIG, 3 TAB, 6 REF
  • Corporate Authors:

    Bitumen Division, Shell Co /Germany

    ,    
  • Authors:
    • Thompson, P D
  • Publication Date: 1965-8

Subject/Index Terms

Filing Info

  • Accession Number: 00210554
  • Record Type: Publication
  • Source Agency: Road Research Laboratory /UK
  • Files: TRIS
  • Created Date: Mar 20 1972 12:00AM