In 2000, TRL were commission by Defence Estates, UK to produce an updated Guidance Note on the use of the falling weight deflectometer (FWD) and ground penetrating radar (GPR) on the use of these devices on UK airfields. It was found that there were no systematic differences between the FWD and the heavy weight deflectometer (HWD). The HWD was advantageous only on exceptionally stiff subgrades where errors in deflections could give misleading results, and testing load transfer efficiencies of very strong pavements where a FWD may not mobilise the joint. A software comparison showed that using non-linear models for the subgrade produced markedly different results for all layers, and that reasonable consistency was obtained using four of the six programs tested. For the covering abstract for this conference see ITRD E124961.

  • Corporate Authors:


    Crowthorne House, Nine Mile Ride
    Wokingham, Berkshire  United Kingdom  RG40 3GA
  • Authors:
  • Publication Date: 2002


  • English

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  • Accession Number: 00988440
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Files: ITRD
  • Created Date: Apr 4 2005 12:00AM