• Concrete Diffusion Coefficients and Existing Chloride Exposure in North Carolina

    NCDOT Research Project Number: 2004-12

Executive Summary

  • During this project, an investigation will be performed to determine a correlation between the Rapid Chloride Permeability Test (RCPT) results and the diffusion coefficients of the same concrete samples. This correlation will be performed on 15 concrete mix designs specified by the NCDOT engineers. The results of this work will support a mathematical model to be used in predicting the service life of bridges across North Carolina. The project will also include the evaluation of core samples taken from 25 reinforced concrete bridges located in various geographical locations. The data generated in this phase will provide comprehensive chloride profiles and chloride loading data for regions of North Carolina and for typical bridge structural components.​

    Among these 25 bridges, special attention will be given to the US264 structure over the Croatan Sound (Manteo Bypass), by performing a thorough analysis of the RCPT values obtained throughout the structure.


  
Researchers
  
Janos Gergely
  
Greg Perfetti
  
Mrinmay "Moy" Biswas

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Report Period

  • July 2003 - June 2005

Status

  • Complete

Category

  • Structures, Construction and Geotechnical

Sub Category

  • Durability and Corrosion Resistance

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