Variability analysis of the bulk resistivity measured using concrete cylinders.

Details

• Creators:
  Spragg, Robert P. ; Castro, J. ; Nantung, Tommy Edward ; Paredes, Mario A ; Weiss, W. Jason
• Corporate Creators:
  Joint Transportation Research Program (Ind.)
• Corporate Contributors:
  Indiana. Dept. of Transportation
• Subject/TRT Terms:
  Analysis Of Variance Concrete Concrete Structures Electrical Resistivity Electrodes Resistivity Method Variance
• Publication/ Report Number:
  FHWA/IN/JTRP-2011/21
• Resource Type:
  Tech Report
• Geographical Coverage:
  Indiana
• Corporate Publisher:
  Indiana. Dept. of Transportation
• Abstract:
  "Many agencies are interested in using a rapid test method for measuring the electrical properties of concrete (i.e., the
  
  resistivity or conductivity) since the electrical properties can be related to fluid transport (e.g., ion diffusion). The advantage
  
  of electrical testing is that it is relatively easy to perform and the test method is relatively fast (less than a minute). Over the
  
  last century, many studies have investigated different approaches for measuring electrical properties. This paper describes
  
  the variability associated with measuring the bulk resistivity along the longitudinal axis of a cylinder after placing electrodes
  
  on either end. A multi-laboratory evaluation was performed using ten laboratories. Data from this evaluation provided
  
  variability data for twelve concrete mixtures at testing ages of 28, 56, and 91 days. Information on the variability is important
  
  in the development of precision and bias statements for standard test methods. In addition, this work discusses how the
  
  resistivity results obtained from this test can be correlated with surface resistivity measurements made using the Wenner
  
  probe. A linear agreement was noticed between the Wenner test and the measurement through the cylinder, but with a factor
  
  confirmed by previous research by Morris et al. (1996). Additionally, the effect of electrode resistance was discussed and for
  
  high resistivity concrete such as that used in much of the transportation infrastructure, this effect appears to be negligible;
  
  however, it can be accounted for easily."
  
  
• Format:
  PDF
• Funding:
  SPR-3509
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:ab99dd522a9a94af697af35fa57a97c0fc045d0f7969c6789bd7422929be40100315ef892c9241e631eed9631f2dec5ee3e6338e8c5d1ed23e823f2f2b4e8e32
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/23799/dot_23799_DS1.pdf
• File Type:
  [PDF - 3.13 MB ]