IN SITU DETERMINATION OF THE BEARING CAPACITY OF GRANULAR ROAD BASES . 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 describes the second phase of the development of a dynamic version of the plate test for estimating the elastic stiffness of granular layers in a road base. The new test is similar to the static version of the test, but uses impact loading rather than static loading. This has the advantages of not requiring a heavy truck to provide the reaction load, and reducing the testing time per measuring point to a few minutes. The experiments described here used a test pavement, containing ten test sections with bases containing a wide range of granular materials from sand-cement to sand. The dynamic plate bearing test appears to be a quick and accurate method for fundamentally and statistically sound proof testing of granular layers, and its result expresses the support to the asphalt layers in one easily interpreted parameter. After compaction of the granular layer, the test can be used to check the design assumptions about elastic stiffness. As the test uses rather complicated and expensive falling weight deflectometer (FWD) equipment, a much simpler empirical device, the Clegg impact tester was also tested; it appears to be usable as a contractor's tool for estimating the uniformity of granular layers on site. (TRRL)

  • Availability:
  • Corporate Authors:

    Tapir

    Trondheim University, Gloeshaugen
    Trondheim-NTH,   Norway 
  • Authors:
    • SWEERE, GTH
    • GALJAARD, P J
  • Publication Date: 1990

Language

  • English

Media Info

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Filing Info

  • Accession Number: 00612255
  • 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