CONTINUOUS MEASUREMENT OF THE ADHESION BETWEEN TYRE AND PAVEMENT. THE SCRIM APPARATUS (SIDEWAYS FORCE COEFFICIENT ROUTINE INVESTIGATION MACHINE)

MESURE EN CONTINU DE L'ADHERENCE PNEUMATIQUE-CHAUSSEE - APPAREIL SCRIM.

IN ORDER TO SATISFY CERTAIN CRITERIA, THE LABORATOIRES DES PONTS ET CHAUSSEES HAVE ACQUIRED AN APPARATUS FOR THE MEASUREMENT OF THE CONTINUOUS TRANSVERSE COEFFICIENT, WHICH HAS ALREADY BEEN INTRODUCED IN THE UNITED KINGDOM: THE SCRIM (SIDEWAYS FORCE COEFFICIENT ROUTINE INVESTIGATION MACHINE). THE CRITERIA TO BE SATISFIED INCLUDED THE FACILITY TO USE THE MEASURING DEVICE IN A FLOW OF TRAFFIC, SIMULATION OF WET CONDITIONS, CONTINUOUS OPERATIONS. FOLLOWING A DESCRIPTION OF THE APPARATUS (WATERING ARRANGEMENTS, HYDRAULIC PLANT, MEASUREMENT WHEEL, RECORDING OF DATA, CONTROL DESK) THE INFLUENCE OF THE SPEED AND DEPTH OF WATER ON THE MEASUREMENTS CARRIED OUT ON FOUR EMBANKMENTS WAS DEMONSTRATED. THESE EMBANKMENTS PRESENT ALL POSSIBLE COMBINATIONS BETWEEN GOOD AND BAD MICROROUGHNESS AND MACROROUGHNESS, AND GIVE SOME INDICATIONS REGARDING THE DISPERSION OF THE RESULTS WITH TEMPERATURE, TYRE WEAR, RADIUS OF CURVATURE OF A BEND. CORRELATIONS HAVE BEEN MADE BETWEEN THE SCRIM APPARATUS AND THE LPC TOWING APPARATUS WHICH MEASURES THE COEFFICIENT OF LONGITUDINAL FRICTION OF A BLOCKED WHEEL; THESE HAVE PROVED VERY SATISFACTORY, AND FROM THE MEASUREMENT PROVIDED BY ONE APPARATUS IT IS POSSIBLE TO ESTIMATE THE RESULT OBTAINED BY THE OTHER. THE SCRIM APPARATUS APPEARS SUITABLE FOR THE DETERMINATION OF THE CHARACTER OF A ROAD NETWORK AND FOR DETECTING THE HETEROGENEITY OF THE SURFACE ADHESION OF A ROAD SECTION. IT CANNOT CLAIM THE PRECISION OF THE LPC TOWING APPARATUS OR OF THE STRATOGRAPH, BUT IT CAN TEST APPROXIMATELY 100 KM PER DAY, GIVING A MEAN VALUE EVERY 20 M.

Language

  • French

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Filing Info

  • Accession Number: 01296710
  • Record Type: Publication
  • Source Agency: Institut Francais des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)
  • Files: ITRD
  • Created Date: Nov 21 2010 6:02AM