This report discusses the major principles which can be used to categorize the various nondestructive testing techniques: static deflections, steady state deflections, impact load resistance, and wave propagation. Due to their simplicity and ease of testing, static deflection devices are widely used. Through use of limiting deflection criteria, static deflections are commonly used to rate existing load capacities and to predict overlay requirements. As steady state deflections correlate well with static measurements, they are often used as a rapid means of obtaining data for use in static based procedures. They have also been used to corrleate directly with allowable loadings determined by conventional thickness design procedures. The impact testing technique offers an extremely rapid technique for dtermining the dynamic load response characteristics of pavement structures. The wave propagation technique offers promise of providing elastic moduli values for all of the pavement layers. New techniques such as laser devices, light emitting diodes, and photography offer a potential for rapid deflection measurements using full-scale moving loads.

Media Info

  • Features: Figures; References; Tables;
  • Pagination: 33 p.
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00170819
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Mar 29 1978 12:00AM