THE QUANTITATIVE ASSESSMENT OF THE ROUGHNESS OF ROAD SURFACES IN RELATION TO THE WET FRICTIONAL RESISTANCE /IN GERMAN/

THE PAPER ATTEMPTS TO DESCRIBE QUANTITATIVELY THE FORMS OF ROUGHNESS DESIRABLE IN THE INTEREST OF SKID- RESISTANCE. TO ASSESS THE SURFACE TEXTURE, THE VOLUME OF THE DRAINAGE CAVITIES, WHICH PROVIDE THE COARSE ROUGHNESS OF THE CARRIAGEWAY SURFACE FOR VEHICLE GRIP, IS COMBINED WITH THE CLOSENESS OF SUCCESSION OF THE CAVITIES TO FORM A CHARACTERISTIC COEFFICIENT. THE TWO QUANTITIES ARE OBTAINED FROM STATISTICAL DISTRIBUTIONS. TO CHARACTERIZE THE DEGREE OF SHARPNESS OF THE BEARING PORTION OF THE SURFACE, VALUES OF FRICTION ARE DETERMINED AT SPEEDS OF A FEW MILLIMETERS A SECOND. BY COMPARATIVE MEASUREMENTS ON CORES TAKEN FROM ROAD PAVINGS AND ON MODEL SURFACES IT IS SHOWN THAT THERE IS A CORRELATION BETWEEN A COMBINATION OF THESE SURFACE DIMENSIONS AND THE SKID RESISTANCE MEASURED WITH THE LOCKED SKID WHEEL. THE SKID RESISTANCE CAN ALSO BE DETERMINED WITH A LABORATORY INSTRUMENT WHICH SIMULATES THE MEASUREMENT WITH THE LOCKED SKID WHEEL. /TRRL/

  • Authors:
    • Schulze, K H
  • Publication Date: 1970

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Filing Info

  • Accession Number: 00206889
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: TRIS
  • Created Date: Jun 12 1973 12:00AM