The Seismic Pavement Analyzer (SPA, patent pending) is an instrument designed and constructed to monitor conditions associated with pavement deterioration. It measures such conditions as voids or loss of support under a rigid pavement, moisture infiltration in asphalt concrete pavement, and delamination of overlays. The SPA detects these types of pavement conditions by estimating Young's and shear moduli in the pavement, base, and subgrade from the following wave propagation measurements: (a) impact echo, (b) impulse response, (c) spectral-analysis-of-surface-waves, (d) ultrasonic-surface-wave-velocity, and (e) ultrasonic-body-wave-velocity. The SPA records the pavement response produced by high- and low-frequency pneumatic hammers on five accelerometers and three geophones. A computer controls data acquisition, instrument control, and interpretation; measurements and interpretations are reported in both screen and data base formats. This paper briefly describes the device and summarizes the usefulness of the equipment in pavement evaluation. The results from several field tests are also discussed. The tests conducted so far have produced very promising results. The device is simple to use, and results have been reliable and repeatable.


  • English

Media Info

  • Features: Figures; References; Tables;
  • Pagination: p. 1-8
  • Monograph Title: Pavement monitoring and evaluation issues
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00715550
  • Record Type: Publication
  • ISBN: 0309061660
  • Files: TRIS, TRB, ATRI
  • Created Date: Jan 4 1996 12:00AM