IN SITU MATERIAL CHARACTERIZATION FOR PAVEMENT EVALUATION USING SURFACE WAVE TECHNIQUES . THIRD INTERNATIONAL CONFERENCE ON BEARING CAPACITY OF ROADS AND AIRFIELDS. PROCEEDINGS, NORWEGIAN INSTITUTE OF TECHNOLOGY, TRONDHEIM, NORWAY, JULY 3-5 1990. VOLUMES 1-2

Spectral-analysis-of-surface-waves (SASW) is a method of nondestructive testing (NDT) for material characterization of pavement systems. The SASW method is based on the theory of stress waves propagating in elastic media with the key elements being the generation and measurement of Rayleigh waves. From these measurements made at strain levels below 0.001 percent, shear wave velocity and modulus profiles can be obtained for multilayered elastic systems. SASW field testing procedures were utilized to collect data on three airfield pavement sites. Pavement types included flexible, rigid, and composite structures over fine-grained and course-grained subgrades. Young's modulus profiles were determined for each pavement system using SASW data reduction and analysis techniques. SASW modulus values were compared with layer moduli backcalculated using elastic layer theory and surface deflections obtained with a falling weight deflectometer (FWD). Based on these results, it is concluded that SASW is a viable method for in situ characterization of pavement materials. Additional research is, however, needed to evaluate low strain effects on the SASW moduli of pavement materials and to develop a means of adjusting these values such that pavement response can be estimated for anticipated loading conditions. Further development and automation of field testing and data analyses techniques would increase the desirability of SASW from a practical standpoint. (Author/TRRL)

  • Availability:
  • Corporate Authors:

    Tapir

    Trondheim University, Gloeshaugen
    Trondheim-NTH,   Norway 
  • Authors:
    • Alexander, D R
  • Publication Date: 1990

Language

  • English

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Subject/Index Terms

Filing Info

  • Accession Number: 00612260
  • 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