RESISTANCE TO PLASTIC FLOW OF BITUMINOUS BASECOURSES MADE WITH GRAVEL AGGREGATES

AN INVESTIGATION INTO THE PERFORMANCE OF COATED GRAVEL BASE-COURSES IS DESCRIBED. IT WAS FOUND THAT MANY OF THE MIXTURES PERFORMED SATISFACTORILY ON HEAVILY TRAFFICKED ROADS, BUT ONE CLASS OF MIXTURE, NOTABLY THAT MADE WITH TAR OF 50 DEGREES E.V.T. OR LESS, WAS PARTICULARLY SUSCEPTIBLE TO PLASTIC DEFORMATION. THE LABORATORY WORK SHOWED THAT PETROLOGICAL NATURE OF THE GRAVEL HAS A VERY IMPORTANT INFLUENCE ON STABILITY. THE DIFFERENCES IN PERFORMANCE DO NOT APPEAR TO BE RELATED TO PARTICLE SHAPE OF GRAVEL USED. THE RESISTANCE TO DEFORMATION OF COATED GRAVEL MIXTURES DEPENDS STRONGLY ON THE CONTENT OF FINE AGGREGATE AND ON THE POROSITY OF THE BINDER. IN THE COURSE OF TAKING SAMPLES FROM FULL SCALE WORK IT WAS OBSERVED THAT SOME FLINT-GRAVEL ASPHALT BASECOURSES HAD STRIPPED. A SIMPLE PRECAUTION OF ADDING 2 PERCENT OF PORTLAND CEMENT TO FLINT-GRAVEL MIXTURES MAY BE ADVISABLE PARTICULARLY FOR HEAVILY TRAFFICKED NEW CONSTRUCTION. /RRLY/

  • Availability:
  • Supplemental Notes:
    • No 37, pp 1238-1245, 4 FIG, 4 TAB, 1 PHOT, 6 REF
  • Corporate Authors:

    SOCIETY OF CHEMICAL INDUSTRY

    14 BELGRAVE SQUARE
    LONDON,   United Kingdom  SW1X 8PS
  • Authors:
    • PLEASE, A
    • Mayer, F E
  • Publication Date: 1968-9

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Filing Info

  • Accession Number: 00211202
  • Record Type: Publication
  • Source Agency: Road Research Laboratory /UK
  • Files: TRIS
  • Created Date: Jul 6 1970 12:00AM