ELECTRICAL RESISTANCE TOMOGRAPHY IMAGING OF MOISTURE DISTRIBUTION IN PAVEMENT SECTIONS

The California Transportation Department (Caltrans) has sought a method to measure the spatial distribution of moisture in a pavement system and to determine moisture movement through the pavement structure. To measure the spatial moisture distribution in pavement structures, a collaborative study with the Lawrence Livermore National Laboratory (LLNL) was conducted. Electrical resistance tomography (ERT) was considered to be suitable for this purpose. ERT technology produces images of the spatial resistivity distribution in pavement structures and subgrade soils. The resistivity distribution correlates with the moisture distribution in pavement structures: high resistivity is interpreted as low moisture content and low resitivity is interpreted as high moisture content. This paper presents a brief description of ERT technology and the results of Caltrans' experiments on ERT.

Language

  • English

Media Info

  • Features: Figures; References; Tables;
  • Pagination: p. 783-805
  • Serial:
    • Volume: 1

Subject/Index Terms

Filing Info

  • Accession Number: 00730089
  • Record Type: Publication
  • Files: TRIS, STATEDOT
  • Created Date: Nov 27 1997 12:00AM