CORRELATION STUDIES WITH FWD, DYNAFLECT AND BENKELMAN BEAM . 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 compares the results of using three different types of equipment to measure the bearing capacity of roads in Sor-Trondelag County, Norway. The equipment compared was: (1) a Dynaflect dynamic power aggregate mounted on a two-wheel trailer; (2) Dynatest 8000 and Phoenix falling weight deflectomers (FWDs); (3) a Lacroix deflectograph, using an automated Benkelman beam mounted under a truck. In the tests, 28 separate road sections at 19 different pavement constructions and subgrades were measured; 18 of the sections were corresponding left and right sections on the same roads. Measurements were taken at intervals of 5, 10 and 50 metres. The following results were obtained: (1) the Dynatest FWD showed consistently lower bearing capacity than the other measuring equipment; (2) the average bearing capacity of the Dynatest FWD was 2.7, 1.1 and 0.5 tonnes below that of the Dynaflect, Phoenix FWD and Lacroix, respectively; (3) the FWDs could register weaknesses in the base and surface better than Dynaflect. To obtain the best possible agreement with Dynaflect, which is the standard equipment for bearing capacity measurements in Norway, its formula was changed. The paper finally indicates some areas for further research. (TRRL)

  • Availability:
  • Corporate Authors:

    Tapir

    Trondheim University, Gloeshaugen
    Trondheim-NTH,   Norway 
  • Authors:
    • Horvli, I
    • Faksdal, I
  • Publication Date: 1990

Language

  • English

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Filing Info

  • Accession Number: 00612253
  • 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