SURFACING COURSES - NORWAY

THIN WEARING COURSES ARE DISCUSSED AND DIVIDED INTO THREE GROUPS: (1) VERY THIN WEARING COURSES ACTING AS A KIND OF IMPROVED DUST-LAYER, (2) PERMANENT OR SEMI-PERMANENT WEARING COURSES, AND (3) TEMPORARY WEARING COURSES ON HEAVILY TRAFFICKED ROADS. MANY KINDS OF DUST-PREVENTING PROCEDURES WERE TRIED. ONE COMMON METHOD IS TO SPREAD A BITUMINOUS BINDER WITH THE AIM OF PENETRATING THE SURFACE AND BINDING THE DUST. THIS METHOD HAS OFTEN FAILED BECAUSE THE BINDER HAS NOT CREATED A CRUST STRONG ENOUGH TO STAND THE TRAFFIC. IT IS RECOMMENDED THAT THE BINDER CONTAIN AMINE AND THE GRAVEL MUST HAVE A SUITABLE GRADING CURVE INCLUDING A WANTED AMOUNT OF FILLER, RESULTING IN A DENSE, DURABLE CRUST OR CARPET. AN EXPERIMENTAL ROAD WAS CONSTRUCTED TO ATTEMPT TO DETERMINE A CONSTRUCTION METHOD TO SECURE THE CONSTANT, PROJECTED QUANTITY OF BINDER AND MINERAL AGGREGATES ON EACH SQUARE FEET. THE PERMANENT WEARING COURSES COMPRISED SURFACE COURSES OF A THICKNESS FROM ABOUT 2.5 TO 4 CM. THE BASE MUST HAVE SUFFICIENT BEARING CAPACITY AND CONSIST OF EITHER GRAVEL OR CRUSHED ROCK, MECHANICALLY STABILIZED. TEMPORARY WEARING COURSES ARE THIN - AROUND 3.5 CM THICKNESS. THIS WAS PLACED ON A BASE WHOSE UPPER LAYER CONSISTED OF ASPHALT STABILIZED CRUSHED ROCK, EITHER PENETRATED OR CENTRAL MIXED, AND A THIN LAYER OF LEAN ASPHALT CONCRETE. STAGE CONSTRUCTION IS DISCUSSED BECAUSE OF THE NECESSITY CAUSED BY INCREASING TRAFFIC AND AXLE-LOADS.

  • Supplemental Notes:
    • No Iii-15, PP 2-17, 7 FIG
  • Authors:
    • Brudal, H
  • Publication Date: 1967

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  • Accession Number: 00205536
  • Record Type: Publication
  • Files: TRIS
  • Created Date: May 24 1994 12:00AM