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Advances in Civil Engineering
Volume 2010 (2010), Article ID 239651, 10 pages
http://dx.doi.org/10.1155/2010/239651
Research Article

Comparison Study of Three Common Technologies for Freezing-Thawing Measurement

1Department of Civil Engineering, Case Western Reserve University, 10900 Euclid Avenue, Bingham 203C, Cleveland, OH 44106-7201, USA
2Department of Civil Engineering, Case Western Reserve University, 10900 Euclid Avenue, Bingham 212A, Cleveland, OH 44106-7201, USA
3Department of Geological Engineering, Chang'an University, Xi'an 710054, China
4Department of Civil Engineering, Case Western Reserve University, 10900 Euclid Avenue, Bingham 210, Cleveland, OH 44106-7201, USA

Received 9 December 2009; Revised 11 March 2010; Accepted 2 April 2010

Academic Editor: Jean-Fran├žois Lataste

Copyright © 2010 Xinbao Yu et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

This paper describes a comparison study on three different technologies (i.e., thermocouple, electrical resistivity probe and Time Domain Reflectometry (TDR)) that are commonly used for frost measurement. Specially, the paper developed an analyses procedure to estimate the freezing-thawing status based on the dielectric properties of freezing soil. Experiments were conducted where the data of temperature, electrical resistivity, and dielectric constant were simultaneously monitored during the freezing/thawing process. The comparison uncovered the advantages and limitations of these technologies for frost measurement. The experimental results indicated that TDR measured soil dielectric constant clearly indicates the different stages of the freezing/thawing process. Analyses method was developed to determine not only the onset of freezing or thawing, but also the extent of their development. This is a major advantage of TDR over other technologies.