Parametric Study of Soil Drying in the Field of Compaction Quality Assurance Using Lightweight Deflectometer

Moving towards modulus-based methods of soil compaction quality assurance using lightweight deflectometers (LWD) requires evaluation of the LWD measured modulus in the field. The resilient modulus of geomaterials is not only influenced by the moisture content (MC) at the time of compaction, but also by the MC at the time of testing, which may be up to few hours after compaction. A parametric study was performed using SoilVision’s SVFlux analysis package to model the variation of soil moisture profile with depth versus time as a function of environmental factors (air temperature, relative humidity, and wind speed) for three different soil properties (soil type, soil water characteristic curve, and saturated hydraulic conductivity). Then LWD modulus values in the field were captured immediately and a few hours after compaction to exhibit the variation of modulus with time and to identify the significance of stiffness gain due to drying.

  • Supplemental Notes:
    • This paper was sponsored by TRB committee AFP60 Standing Committee on Engineering Behavior of Unsaturated Geomaterials.
  • Corporate Authors:

    Transportation Research Board

    ,    
  • Authors:
    • Afsharikia, Zahra
    • Schwartz, Charles W
  • Conference:
  • Date: 2019

Language

  • English

Media Info

  • Media Type: Digital/other
  • Features: Figures; References; Tables;
  • Pagination: 9p

Subject/Index Terms

Filing Info

  • Accession Number: 01697718
  • Record Type: Publication
  • Report/Paper Numbers: 19-01578
  • Files: TRIS, TRB, ATRI
  • Created Date: Dec 7 2018 9:35AM