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Evaluation of Infiltration in Layered Pavements Using Surface GPR Reflection Techniques
Journal of Applied Geophysics
  • Katherine R. Grote, Missouri University of Science and Technology
  • Susan Sharpless Hubbard
  • John T. Harvey
  • Yoram N. Rubin

The bearing capacity of sub-asphalt soils, which is a critical parameter for assessing pavement conditions and guiding pavement maintenance, is greatly influenced by soil water content. In this study, ground-coupled ground penetrating radar (GPR) techniques were used to non-destructively monitor the volumetric water content in sub-asphalt aggregate layers during an extended infiltration experiment. Water was injected over a period of several months into two differently layered pavement test sections, one of which contained a sub-asphalt drainage layer. GPR travel time data were used to estimate the water content in each aggregate layer and the variations in water content with time, and GPR amplitude data were used to indicate areas of high water content immediately beneath the asphalt layer. The GPR data revealed significant variations in the water content of the aggregate layers in both the horizontal and vertical directions and over time. Comparison of the water content estimates from GPR travel time data and from gravimetric water content measurements showed that the difference between the two techniques was approximately 0.02 cm3/cm3. These results suggest that GPR techniques can be used for accurate, non-invasive water content estimation in sub-asphalt aggregate layers and for assessing the efficacy of pavement drainage layers.

Geosciences and Geological and Petroleum Engineering
Keywords and Phrases
  • Ground penetrating radar,
  • Pavement aggregates,
  • Reflection,
  • Water content,
  • Asphalt,
  • Data acquisition,
  • Drainage,
  • Gravimetric analysis,
  • Infiltration,
  • Soils,
  • Volumetric analysis,
  • GPR amplitude data,
  • GPR travel time data,
  • Sub-asphalt soils
Document Type
Article - Journal
Document Version
File Type
© 2005 Elsevier, All rights reserved.
Publication Date
Publication Date
01 Feb 2005
Citation Information
Katherine R. Grote, Susan Sharpless Hubbard, John T. Harvey and Yoram N. Rubin. "Evaluation of Infiltration in Layered Pavements Using Surface GPR Reflection Techniques" Journal of Applied Geophysics Vol. 57 Iss. 2 (2005) p. 129 - 153 ISSN: 0926-9851
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