Applications of electrical impedance methods in linking structure of micro- and macro-porous concretes to their transport properties

Narayanan Neithalath, Jitendra Jain

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

Electrical impedance based methods are frequently used to monitor the microstructural development in cement-based materials due to their non-invasive nature and the ability to make continuous measurements. This paper discusses two other applications of electrical impedance for two different classes of concretes - micro-porous conventional concretes and macro-porous pervious concretes. The effectiveness of a microstructural parameter derived from electrical impedance data to relate to the rapid chloride transport parameters of conventional concretes is described. The influence of the non-steady state migration test in changing the microstructure of concretes due to formation of new solid products through chloride binding of cement hydrates is also evaluated in detail through a combination of measured electrical impedance parameters and an equivalent electrical circuit model. The values of the components of the model determined before and after the migration test provide confirmation of the formation of binding products along the pore walls in concrete. Electrical impedance observations along with a modified Bergman equation are used to predict the porosity of pervious concretes. The experimentally determined and predicted porosities match adequately. The effective electrical conductivity can also be used in well known permeability prediction equations such as the Kozeny-Carman or Katz-Thompson equations for performance prediction of pervious concretes.

Original languageEnglish (US)
Title of host publicationAdvances in the Material Science of Concrete - Session at the ACI Spring 2010 Convention
Pages33-50
Number of pages18
Edition270 SP
StatePublished - Dec 1 2010
Externally publishedYes
EventACI Spring 2010 Convention - Chicago, IL, United States
Duration: Mar 21 2010Mar 25 2010

Publication series

NameAmerican Concrete Institute, ACI Special Publication
Number270 SP
ISSN (Print)0193-2527

Other

OtherACI Spring 2010 Convention
CountryUnited States
CityChicago, IL
Period3/21/103/25/10

Keywords

  • Chloride transport
  • Electrical impedance spectroscopy
  • Permeability
  • Pervious concrete
  • Pore connectivity
  • Pore structure
  • Porosity

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • Materials Science(all)

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  • Cite this

    Neithalath, N., & Jain, J. (2010). Applications of electrical impedance methods in linking structure of micro- and macro-porous concretes to their transport properties. In Advances in the Material Science of Concrete - Session at the ACI Spring 2010 Convention (270 SP ed., pp. 33-50). (American Concrete Institute, ACI Special Publication; No. 270 SP).