SYNTHESIS ON CONCRETE ROUGHNESS /IN FRENCH/

RESEARCH ON THE ROUGHNESS OF A NUMBER OF EXPERIMENTAL SECTIONS OF ROAD IS OUTLINED AND FINDINGS ARE GIVEN CONCERNING THE FINISHING OF ROUGH CONCRETE SURFACINGS AND THEIR LONG TERM PERFORMANCE. RESULTS OF A SIX-YEAR INVESTIGATION INTO THE EFFECTS OF TRAFFIC ON SURFACINGS WITH DEEP TRANSVERSE GROOVES ARE PRESENTED. IN ORDER TO RETAIN A HIGH DEGREE OF ROUGHNESS, THE SURFACING MUST HAVE AN AVERAGE SURFACE TEXTURE DEPTH OF 2 MM AND NO SAND OR STONE ELEMENTS SUSCEPTIBLE TO POLISHING NEAR THE CONCRETE SURFACE. IT WAS POSSIBLE TO OBTAIN SIMILAR SURFACE TEXTURE DEPTHS USING THE ROUGHENING CURING COMPOUND SPRAYING MACHINE DEVELOPED BY THE CENTRE DE RECHERCHES ROUTIERES. ROUGHNESS MEASUREMENTS CARRIED OUT AT DIFFERENT SPEEDS (20 TO 80 KM/HOUR) SHOWED THAT THE COEFFICIENT OF TRANSVERSE FRICTION BETWEEN 20 AND 80 KM/HOUR DECREASES LINEARLY AS A FUNCTION OF THE AVERAGE SURFACE STRUCTURE DEPTH, AND IS INDEPENDENT OF THE DEGREE OF POLISHING OF THE SURFACING; BETWEEN 25 AND 30 KM/HOUR THE COEFFICIENT OF TRANSVERSE FRICTION IS INDEPENDENT OF THE AVERAGE SURFACE TEXTURE DEPTH, BUT ITS VALUE DEPENDS ON THE DEGREE OF POLISHING OF THE AGGREGATES ON THE SURFACE. THE DISPERSION OF COEFFICIENT OF TRANSVERSE FRICTION MEASUREMENTS IS DISCUSSED, AND AN ATTEMPT IS MADE TO RELATE INCREASES IN THE STANDARD DEVIATION OF THE COEFFICIENT OF TRANSVERSE FRICTION TO SPECIFIC CONSTRUCTION METHODS OR TRAFFIC CONDITIONS. /CRIC/FESR/LCPC/A/RRL/

  • Availability:
  • Supplemental Notes:
    • Vol 13, No 3, PP 1-16, 7 FIG, 2 TAB, 6 REF
  • Authors:
    • Leyder, J P
  • Publication Date: 1968-9

Media Info

  • Serial:
    • Technique Routiere
    • Publisher: Association Permanente des Congres Belges de Route
    • ISSN: 0040-1277

Subject/Index Terms

Filing Info

  • Accession Number: 00214947
  • Record Type: Publication
  • Source Agency: Road Research Laboratory /UK
  • Files: TRIS
  • Created Date: Apr 18 1971 12:00AM