Journal Published Online: 19 April 2018
Volume 7, Issue 1

Comparison of Linear Temperature Corrections and Activation Energy Temperature Corrections for Electrical Resistivity Measurements of Concrete

CODEN: ACEMF9

Abstract

Electrical resistivity measurements are increasingly being used as measurements for concrete acceptance in practice. It has been shown that these measurements are sensitive to temperature. This paper examines the influence of temperature on electrical resistivity measurements in concrete. Two temperature correction approaches that are commonly used by researchers and practitioners were evaluated: a linear temperature correction approach (α) and an activation energy–based temperature correction approach (Ea-cond). These approaches were compared with each other and their predictive capabilities were assessed using measured data from various concrete mixtures. It was found that for cases of low temperature sensitivity (low values of α or Ea-cond), the predictions obtained with α and with Ea-cond were similar. However, the Ea-cond approach was found to provide more accurate corrections (lower error) than corrections using α for measurements conducted at lower temperatures and for systems with higher temperature sensitivities (high values of α or Ea-cond). For saturated concrete specimens, both the linear (α) and activation energy (Ea-cond) approaches are acceptable, whereas the use of the Ea-cond approach provides better predictive capabilities in sealed concrete specimens, especially at low temperatures. The average values for Ea-cond were found to be 29.8 kJ/mol for sealed specimens and 15.8 kJ/mol for saturated specimens, and corresponding average values of α are 3.25 %/°C and 2.00 %/°C, respectively. The values for Ea-cond for saturated specimens are closer to what is expected of a pore solution on its own.

Author Information

Coyle, Alex T.
School of Civil and Construction Engineering, Oregon State University, Corvallis, OR, USA
Spragg, Robert P.
SES Group & Associates LLC at Turner-Fairbank Highway Research Center, McLean, VA, USA
Suraneni, Prannoy
Department of Civil, Architectural and Environmental Engineering, University of Miami, Coral Gables, FL, USA
Amirkhanian, Armen N.
Department of Civil, Construction and Environmental Engineering, University of Alabama, Tuscaloosa, AL, USA
Weiss, William J.
School of Civil and Construction Engineering, Oregon State University, Corvallis, OR, USA
Pages: 14
Price: $25.00
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Stock #: ACEM20170135
ISSN: 2379-1357
DOI: 10.1520/ACEM20170135