Measurement of Soil Air Suction Change during Freezing-Thawing Process

This paper introduces a new instrument and experimental procedure that estimates the change of air suction in soils during the freeze-thaw process. The experimental procedures include a nondestructive measurement by Time Domain Reflectometry (TDR) sensor, which captures the freezing-thawing status. The change of air suction causes change of soil volume, which is estimated from the volume change and soil deformation modulus. The experimental data indicates there is a graduated decrease in the magnitude of the negative air suction, which resulted in volume expansion in soils. The observed bulk volume change is the combined effects of the volume contraction due to ice melting and the volume expansion due to the reduction in the negative air suction. The magnitude of air suction reduction estimated is achieved by fusion of the information from both mechanical and electromagnetic measurement.

Language

  • English

Media Info

  • Media Type: Print
  • Features: Figures; Photos; References; Tables;
  • Pagination: pp 36-43
  • Monograph Title: Soils and Rock Instrumentation, Behavior, and Modeling: Selected Papers From the 2009 GeoHunan International Conference

Subject/Index Terms

Filing Info

  • Accession Number: 01142801
  • Record Type: Publication
  • ISBN: 9780784410462
  • Files: TRIS
  • Created Date: Oct 23 2009 4:22PM