NON-DESTRUCTIVE TESTING UTILIZING CONTROLLED VARIABLE RISE TIME

Non-destructive testing is commonly used for assessing fatigue and rutting characteristics in pavements. This paper discusses various studies that have been conducted. (1) A study by van Gurp and Dorsman comparing different Falling Weight Deflectometer (FWD) models showed a large discrepancy of deflection for the various machines. (2) Lukanen compared different buffers on the same type of machine and concluded that the shape of the buffer indeed affected the deflections and consequently the backcalculated moduli. In order to study the effects of load pulse, an experiment was conducted where the length of the load pulse was changed for the same machine. (3) Several pavements have been built in recent years with strain gauges for various research projects. One is operated by the Technical Research Centre in Finland (VTT) for studies of truck tires and wheel configurations. (4) Also included is pilot projects for the Minnesota Road Research Project, (Mn/ROAD). These include full-depth asphalt, and portland cement concrete pavements complementing the structures at the VTT-field.

Language

  • English

Media Info

  • Features: Figures; References; Tables;
  • Pagination: p. 467-490
  • Serial:
    • Volume: 1

Subject/Index Terms

Filing Info

  • Accession Number: 00730070
  • Record Type: Publication
  • Files: TRIS, STATEDOT
  • Created Date: Nov 27 1997 12:00AM