TEST PROCEDURE FOR RIGID PAVEMENTS USING FALLING WEIGHT DEFLECTOMETER . THIRD INTERNATIONAL CONFERENCE ON BEARING CAPACITY OF ROADS AND AIRFIELDS. PROCEEDINGS, NORWEGIAN INSTITUTE OF TECHNOLOGY, TRONDHEIM, NORWAY, JULY 3-5 1990. VOLUMES 1-2

This paper discusses the factors influencing pavement deflection response and deflection measurements, and outlines a normalised test procedure for rigid pavements. Its discussion applies specifically to the falling weight deflectometer (FWD), but it can also be applied to other measuring equipment used to sense pavement deflection due to load. The amount of deflection of a pavement subjected to a given load is influenced by: (1) load position; (2) joint efficiency; (3) curling caused by temperature gradient; (4) cavities and voids under the pavement slab. To enable deflection data to be mutually compatible and treated similarly, it is assumed that: (1) the pavement system is homogeneous; (2) the load intensity is constant; (3) load positions correspond in all cases; (4) load transfer at a joint is specific and representative for each pavement slab, and influenced by ambient temperature and temperature gradient; (5) curl and warp are caused by temperature and moisture gradients. For uniform test data from a common set of conditions, (1) ambient test temperature should be between 7 and 20 degrees Centigrade; (2) the variation in ambient temperature should not exceed 3 degrees; (3) the temperature gradient should not exceed 0.028 degrees per millimetre; (4) the observations are best performed at night (TRRL)

  • Availability:
  • Corporate Authors:

    Tapir

    Trondheim University, Gloeshaugen
    Trondheim-NTH,   Norway 
  • Authors:
    • Larsen, T J
  • Publication Date: 1990

Language

  • English

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Filing Info

  • Accession Number: 00612252
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • ISBN: 82-519-1033-1
  • Files: ITRD, TRIS
  • Created Date: Aug 31 1991 12:00AM