Effects of aggregates to the electrical resistivities of concrete

Tsung Chin Hou, Van Kien Nguyen

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

Abstract

In this study, the influences of coarse aggregate to the electrical resistivities of concrete were investigated. Specifically, types and sizes of the aggregates were targeted as the studied parameters. Commercially available granites and marbles with various sizes were used in the concrete mixtures, and resistivities of the specimens at the age of 28 days were investigated. Polarization induced resistivity growth during the electrical measurement were considered and experimentally nullified, such that the real bulk resistivities of concrete can then be obtained for comparison. Concrete specimens were prepared with various amounts of coarse aggregate contents and sizes; with a unique size used in a single specimen. Cement mortars were mixed with a water/cement ratio of 0.4, and the cement/sand ratio of 1. In addition to electrical measurements, microstructures of certain specimens were also investigated by Scanning Electron Microscopy (SEM) so as to estimate the porosity of the cement matrices, which is considered as the primary conductive portion of cementitious materials. The results show that the electrical resistivities of concrete composed of granites were very close to those made of marbles. The particle size of aggregates also seems to have no significant influences to concrete resistivities while it is to the strengths. As a partial study of nondestructive testing (NDT) to the performance estimations of concrete, we have drawn a few comments for future studies.

Original languageEnglish
Title of host publicationISEC 2013 - 7th International Structural Engineering and Construction Conference
Subtitle of host publicationNew Developments in Structural Engineering and Construction
EditorsSiamak Yazdani, Amarjit Singh
PublisherResearch Publishing Services
Pages1073-1078
Number of pages6
ISBN (Electronic)9810753551, 9789810753559
DOIs
Publication statusPublished - 2013 Jan 1
Event7th International Structural Engineering and Construction Conference: New Developments in Structural Engineering and Construction, ISEC 2013 - Honolulu, United States
Duration: 2013 Jun 182013 Jun 23

Publication series

NameISEC 2013 - 7th International Structural Engineering and Construction Conference: New Developments in Structural Engineering and Construction

Other

Other7th International Structural Engineering and Construction Conference: New Developments in Structural Engineering and Construction, ISEC 2013
CountryUnited States
CityHonolulu
Period13-06-1813-06-23

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Building and Construction

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