Evaluation of pavement layer response at the Virginia smart road

Walid Nassar, Imad L. Al-Qadi, Gerardo W. Flintsch, Alexander Appea

Research output: Contribution to conferencePaper

Abstract

The heavily instrumented Virginia Smart Road project provided the opportunity to test various hypotheses on pavement nondestructive testing using falling weight deflectometer (FWD). This was achieved by analyzing the deflections obtained on top of each layer as the road was being constructed. Two loading plate sizes were used at the subgrade and aggregate subbase surfaces. Five different loadings were used in each testing. This allows an accurate backcalculation of insitu resilient modulus of each layer. Such results may be used to calibrate future FWD measurements. The study found that using the surface modulus to characterize the subgrade might sometimes be misleading. In addition, characterization of the deflection basin using deflections alone may not provide accurate results. Using the ratio between the deflection basin area centroid coordinates may provide a reasonable alternative. The distribution of pressure resulted from FWD loading was successfully measured by embedded pressure cells in the HMA base layer.

Original languageEnglish (US)
Pages104-118
Number of pages15
DOIs
StatePublished - Dec 1 2000
EventSessions of Geo-Denver 2000 - Pavement Subgrade, Unbound Materials, and Nondestructive Testing, GSP 98 - Denver, CO, United States
Duration: Aug 5 2000Aug 8 2000

Other

OtherSessions of Geo-Denver 2000 - Pavement Subgrade, Unbound Materials, and Nondestructive Testing, GSP 98
CountryUnited States
CityDenver, CO
Period8/5/008/8/00

Keywords

  • Deflection
  • Evaluation
  • Instrumentation
  • Nondestructive tests
  • Pavement condition

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology
  • Civil and Structural Engineering
  • Mechanics of Materials
  • Building and Construction

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  • Cite this

    Nassar, W., Al-Qadi, I. L., Flintsch, G. W., & Appea, A. (2000). Evaluation of pavement layer response at the Virginia smart road. 104-118. Paper presented at Sessions of Geo-Denver 2000 - Pavement Subgrade, Unbound Materials, and Nondestructive Testing, GSP 98, Denver, CO, United States. https://doi.org/10.1061/40509(286)7