Electrical resistance to monitor carbonation and chloride ingress

Yaocheng Wang, Sreejith Nanukuttan, Yun Bai, Kai Yang, P. A. Muhammed Basheer

Research output: Contribution to journalMeeting abstractpeer-review

Abstract

Electrical resistance (R) of concrete is sensitive to changes in the chemical phases and physical structure of hydrated cement paste, moisture content, and the physical structure of concrete. Therefore, R is influenced by both carbonation and chloride ingress. However, in a structure subjected to a combination of carbonation and chlorides, in which there are complex changes to both physical and chemical characteristics of hydration products, the use of electrical resistance measurements to assess the durability of concrete is still limited. In this investigation, four different combinations of carbon dioxide and chloride exposure regimes were used to examine the relationship between the electrical resistance, degree of carbonation, and quantity of chlorides (or chloride content). It has been found that for concretes with a stabilized relative humidity, the electrical resistance is sensitive to cement hydration and variations in chloride content in both independent chloride exposure regime and combined chloride and carbonation regime. However, the relationship between electrical resistance and the degree of carbonation is not that pronounced for accelerated carbonation test regime for 3 months.
Original languageEnglish
Pages (from-to)129-138
Number of pages10
JournalACI Materials Journal
Volume116
Issue number5
DOIs
Publication statusPublished - 09 Jan 2019

Keywords

  • Carbonation
  • Chloride ingress
  • Combined carbonation and chloride ingress
  • Electrical resistance
  • Relative humidity

Fingerprint Dive into the research topics of 'Electrical resistance to monitor carbonation and chloride ingress'. Together they form a unique fingerprint.

Cite this