Hydroplaning is a condition in which the vehicle tires are separated from the pavement by a layer of water. Thus, steering and braking capabilities are greatly reduced. Various methods are employed to control hydroplaning; pavement grooving and providing coarse texture finish are two examples. Their primary purpose is to provide an escape path for water under the tire. The measurement of hydroplaning potential of pavements, that is, of the inability of the accumulated water to escape from the tire-pavement contact area, affords a useful criterion for ranking the performance of the pavements. The results show that very low values of Brake Force Coefficient are obtained when an ASTM Standard E 524 tire is tested at 24 psi (1.66 bar) inflation pressure and 650-lb (295-kg) vertical load. These results enabled the selection of the test parameters for testing at speeds which were easily attainable at the test facility. An important finding was that delivering the water approximately 6.5 ft (2m) ahead of the tire provided thick waterfilm thicknesses required for hydroplaning. By simple modification to the existing friction tester, the hydroplaning potential of four different pavements was measured in terms of the speed above which hydroplaning will occur.


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    Titel :

    Measurement of Hydroplaning Potential


    Beteiligte:
    S. K. Agrawal (Autor:in) / W. E. Meyer (Autor:in) / J. J. Henry (Autor:in)

    Erscheinungsdatum :

    1977


    Format / Umfang :

    102 pages


    Medientyp :

    Report


    Format :

    Keine Angabe


    Sprache :

    Englisch




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